Catherine Brooks from Eco-Strip, the exclusive US distributor of the Speedheater Paint Removal System, joined the Practical Preservation podcast to discuss her company which allowed her to bring together her passion for the environment and public health.  

The Speedheater is different from other heat-based paint removal systems because it heats the paint using  InfraRed allowing the paint to heat and lift from the wood, but not hot enough to release lead fumes into the air.  Here’s a video of the newest Speedheater – The Cobra:

A longer version of our teaser for SH Cobrawww.speedheater.se

Posted by Speedheater System AB Sverige on Tuesday, June 7, 2016

Contact:

Eco-Strip – call 703-476-6222 or email [email protected] 

Website: https://eco-strip.com/

Offer: $30 off of a Cobra or Speedheater kit with tools using code KPS

 

Paint is probably on a lot of homeowner’s minds right now (and if you listened to last week’s podcast you have definitely thought about it). With the warmer weather allowing us to step outside and breathe fresh air, we’re also afforded the opportunity to see what the weather and time have done to the outside of our homes. Updating the paint on your home’s exterior might be an obvious need, and is a task best completed when temperatures are mild and not too humid. Spring is a good time to plan and prep for that, so read on for pointers on painting your historical home.

Photo by David Pisnoy on Unsplash

Painting a historical home can be quite a challenge. Proper preparation, risk of damage, quality and cost, safety, color choices, and maintaining it all must be considered. Read on for tips to navigate this process.

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TIPS FOR PAINTING YOUR HISTORICAL HOME

  • Preparation. One of the key elements to a successful, long-lasting project is the surface preparation. For the different types of paint that may already be on your building, each has its own preparation requirements. If you are not sure what type of paint is on your building, you can consult a qualified contractor  to obtain a paint analysis, providing you with both the chemical and color makeup of your existing paint. Determine if paint is failing, and possible causes – moisture is usually the reason paint is failing. Once you have addressed the underlying cause, you can move on to preparing the surface for the paint. Make sure that the surface is clean and free of loose paint (you can remove the paint completely, but this is not always necessary to get to a sound surface). Never use abrasive methods (see next bullet regarding damage avoidance below) to remove paint. Listen to one of our previous podcasts for tips on one option to safely strip paint. After the paint is removed and the surface is cleaned, make sure that the wood has a chance to dry out before the prime coat is added. If the wood is very dry (e.g., the paint has peeled off and it has been allowed to weather with no coating) you can pre-treat with 50% boiled linseed oil and 50% turpentine prior to the oil-based prime coat. Using good lead-safe habits is important for any building pre-1978 (we assume it has lead paint unless it has been abated)

 

Because paint removal is a difficult and painstaking process, a number of costly, regrettable experiences have occurred – and continue to occur – for both the historic building and the building owner. Historic buildings have been set on fire with blow torches; wood irreversibly scarred by sandblasting or by harsh mechanical devices, such as rotary sanders and rotary wire strippers; and layers of historic paint inadvertently and unnecessarily removed. In addition, property owners using techniques that substitute speed for safety have been injured by toxic lead vapors or dust from the paint they were trying to remove, or the misuse of the paint removers themselves.

Being too aggressive with paint removal can damage the historical materials. Never use abrasive methods, mostly because of the public safety and lead paint, but also the potential to damage the wood. Using heat can also be dangerous. Open flame torches and even heat guns can cause a fire to start. There are infrared systems that do not get as hot as heat guns, if you wanted an option beyond chemical strippers.

 

  • Quality and Cost. The temptation to save money by using cheap paint can be alluring. Many contractors, and even homeowners, mistakenly think that paint choices need only match historical colors, but this is not so. The old adage “you get what you pay for” is particularly true for your paint. Investing in quality paint will save you money in the long run. For a limited time, The Real Milk Paint Co. is offering a “3 FOR FREE” deal; Buy 3 samples of product of your choice for $3.50 each, and they get shipped to you for free.

 

  • Safety and Handling Lead Paint. The health risks of lead exposure are well known – brain and nervous system damage, hearing and vision loss, impaired development of children, etc. But, did you know that lead in dust – such as the dust created while sanding and prepping surfaces for new paint – is the most common route of exposure to lead? To avoid these risks, choose a contractor who is “Renovation, Repair, and Painting” certified by the EPA for lead paint handling. There is also general information from EPA for homeowners. 

 

 

  • Maintenance. The National Park Service’s Preservation Briefs No. 47 on Maintaining the Exterior of Small and Medium Size Historic Buildings indicates that exteriors of the home should be inspected at least annually to determine if paint should be repaired, otherwise corrected, or exteriors need re-painted. You can also view our video on general maintenance plans and paint maintenance. 

 

Ask yourself these questions before beginning any painting project:

  • Does my paint exhibit any peeling, crackling, chalking (powdering), crazing (small, interconnected cracks), mold, mildew, staining, blistering or wrinkling?
  • Does my building have an existing paint application that is inappropriate for its historic fabric?
  • Do I know what type of paint is currently on my building and what preparation is required before painting over that type of paint?
  • If I am using a contractor, are they “Renovation, Repair and Painting” certified by the EPA for lead paint handling?
  • Does that contractor understand which methods, tools, materials, and chemicals are appropriate for paint removal on my historical building?

FURTHER RESOURCES FOR PAINTING HISTORICAL BUILDINGS:

 

Winter may soon be coming to a close, but there’s still time during the tempestuous month of March for Spring to “come in like a lion,” as the old proverb goes. The uncertainty of weather related to climate change aggravates the issues we already see at the end of Winter as well, adding to the concerns of homeowners attempting to maintain the energy efficiency and temperature of their homes. With that in mind, we’re focusing on energy efficiency for historic buildings for today’s blog post. 


Photo by Alessandro Bianchi on Unsplash

First, let’s debunk a myth about old homes and energy efficiency. A common misconception about older buildings is that they are drafty, inefficient energy hogs. The truth is that the buildings with the worst energy efficiency were built between 1940-1970. Energy was cheap and there wasn’t a big push to conserve our resources during that time-period. Buildings constructed before 1940 were made with energy savings, thermal performance, and physical comfort in mind. By maximizing natural sources of heating, lighting, and ventilation, these buildings were comfortable in all seasons.

Still concerned about energy efficiency in your historic building or home? Read on for advice on improvements that will not sacrifice the historical integrity of your space.
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TIPS TO INCREASE ENERGY EFFICIENCY

ON YOUR OWN:

  • Change your Habits.  Install timers or motion detectors on lights, attach self-closing mechanisms on doors that might otherwise hang open, install fans and raise your thermostat temperature, use LEDs in your lights and turn off “vampire” devices that use electricity in standby mode or that use electricity in standby mode or whenever that are plugged into an outlet.
  • Remove focus from Siding. Remember our previous post on siding on historic homes. Walls themselves are not a significant source of energy loss, so replacing original siding with new synthetic siding really does not cut costs or improve energy efficiency.
  • Caulking or Weather-Stripping. The easiest tip for increasing the energy efficiency of your building is to reduce the air infiltration using caulking and/or weather-stripping. You can do a self-audit of the envelope of your building (roof; walls and wall penetrations including doors, windows; floor, and foundation) to determine if these methods are necessary. If there are places that you feel cold air coming in you can add additional weather-stripping or caulking to the area and seal the crack. In warmer months this will also stop your conditioned air from escaping to the outside.           2 points of caution:
    • Only use the spray foam against masonry penetrations – it will cause any wood it is against to rot
    • Do not make the building too tight – older buildings were built for air to move and if all air movement is stopped it will cause problems with moisture accumulation
  • Combat the Stack Effect. The method above is helpful, but it does not give you the highest return-on-investment for making your home energy efficient because of the Stack Effect. To combat the Stack Effect, insulate at the basement floor (where the air comes in) and at the attic (where the air goes out). It’s also important to determine the R-Value (measure of thermal resistance) for your area to ensure you are most effectively stopping air leaks.  You can find your recommended R-Value here.                                                                                                                                                                Options for insulation:
    • “Green” or environmentally-friendly options (natural materials like cellulose and wool)
    • Fiberglass
    • Spray foam
    • Foam board (purchases can be made at big-box stores or SIPS)

WITH PROFESSIONAL HELP:

  • Seek Professional Assistance. Review our post on hiring the best person for the job. 
  • Have a Maintenance Appraisal Performed.  If you are concerned about identifying air leaks on your own, a maintenance appraisal performed by a qualified contractor will locate any source of air leakage and provide you with a plan-of-attack to remedy the problem without damaging the historic aspects of your home.
  • Schedule an Energy Audit.  Both the maintenance appraisal and an energy audit are absolutely essential things that need to be done BEFORE you implement any energy improvement measures in a situation where you do not have enough knowledge to take care of things yourself.  The energy audit will evaluate your home’s current energy performance and identify any deficiencies in both the envelope of your home and/or mechanical systems.

FURTHER READING:

Window repair, restoration, or replacement is an unavoidable topic of concern in historic buildings. Windows in your historic property are like the eyes of the home. They are an important piece of the historical fabric of the location, and also play an integral part in energy efficiency of the property. Simultaneously, they are one of the most vulnerable and “at-risk” elements of our architectural heritage. Replacement is not always the most cost-effective or energy-efficient answer. Determining the extent of disrepair in your windows is your first step in deciding whether to repair, restore, or replace them. 

Photo of our restoration work on windows at Franklin Street Station in Reading. 

Why are original windows important? They are considered a significant feature of a building, making up both exterior and interior architectural elements and usually 20-to-30 percent of the surface area of the building. The shape and materials, moldings, trim and window pane arrangements are all clues to the age of the building. To further illustrate these unique characteristics, here are examples of window styles and characteristics from the 18th, 19th, and early 20th century. The majority of the features that make original windows special are not replicable in replacement windows; you could replicate them in reproduction windows, but that is not what most people think of when they are discussing replacement windows. These elements include antique (wavy) glass, true divided light sashes, and traditional joinery.

Why are original windows endangered and at-risk? Several preservation organizations, including Maine, Virginia, and New York, have noted in recent years the endangered status of historic original windows. Even we have had first-hand experience talking with well-intentioned homeowners who’ve been convinced by saavy sales people to replace their original windows with modern ones under the guise that they are more cost-effective or energy efficient, only to regret the decision a few years later when the “superior” new windows are no longer functioning properly and are incurring more costs for energy, repair, and replacement. 

Are original windows energy efficient and cost-effective? Energy efficiency is a major concern when it comes to windows. We’ve noted in a previous post on Siding on Historic Homes that heating and cooling energy loss is associated most with windows, doors, and roofs, and this is often worse with modern replacements and materials. Meanwhile, original windows have a proven track record of durability that far exceeds that of new replacement windows, as long as they are properly maintained. In fact, most are 100+ years old. The National Park Service’s Preservation Brief No. 3 and their Testing Energy Performance of Wood Windows in Cold Climates both discuss energy efficiency in greater depth. The latter of the two aforementioned resources points out that replacing historic windows does not necessarily result in greater energy savings than upgrading that same window. If you’re short on time, you may instead choose to read one of our other brief articles on energy-efficiency and cost-effectiveness of original windows. On average, the energy savings after a replacement window is installed is less than $2/year. Restoring and repairing original windows can achieve almost the same energy efficiency, and is more cost-effective in the long-run because new windows will not last as long. 

Now that you understand the significance of original windows and the importance of saving them, how do you know if your original windows are repairable or restorable? First, consider that most materials and methods used to build the original windows are made to be repairable, so there is a higher likelihood that they are salvageable. Replacement pieces can be made rather than replacing the entire unit (consider our woodwork at the formerly abandoned Franklin Street Station in Reading, PA, whose windows were in a shocking state when we first encountered them; alternatively, you can see the results in-person while enjoying craft beer and a bite to eat at Franklin Street Brew Pub now in the station). Things to evaluate to see what repairs windows might need:

  • Loose frames and sash components
  • Slipped sills
  • Poor fitting sash and storm assemblies, and misaligned frames
  • Loose, open, or decayed joints at sash or frame corners
  • Loose hardware, broken sash cords/chains, worn sash pulleys, locking difficulties
  • Deteriorated weather-stripping
  • Broken/cracked glass, loose or missing glazing putty
  • Peeling paint
  • Window well debris accumulation

Some of these issues are easy to see and address. Others, including locking difficulties and window well debris accumulation might signal a misaligned sash and could necessitate the involvement of a skilled person to make those adjustments (or at least consult with you about what to do). All of these repairs will increase the energy-efficiency of your windows.

What do I do if a previous owner already replaced the original windows and updated replacement is necessary? There are several options to choose from:

  • Rebuild with antique glass
  • Rebuild with true divided lite and insulated glass
  • Replacement with modern replacement windows – The National Park Service’s Preservation Brief No. 9 has a list of what to look for in replacement windows, as well as ideas of where to find historically sensitive replacement windows

For more information and resources:

  • Visit our window post archives link
  • We typically recommend 2 Canadian manufacturers for modern replacement windows: Norwood Windows or Loewen
Age is not the only thing that makes a building historical. The traditional materials and craftsmanship in the original construction of your historical building are an essential part of its historical fabric. Preserving its architectural integrity can only be done by using the same traditional materials and craftsmanship that made your building what it is today – a picture of the past. Original or historically-accurate siding on a historic home or building is an overt example of a building’s era and unique characteristics. 


Photo by Pierre Châtel-Innocenti on Unsplash

 

Synthetic vs. Wood Siding: Life-span

  • Synthetic siding has a potential life of at least 50-60 years
  • Wood siding has a potential life of at least 200+ years

Wood was abundant in Early America (and continued to be so throughout our history), and thousands of historical buildings in the Northeast are adorned with wood siding. Often, owners of these buildings look to alternative siding methods to replace wood siding deteriorated beyond repair. Their rationale for such practices is that they want to reduce the cost and effort of its maintenance, or to save on energy costs; conventional building wisdom maintains that vinyl and other synthetic siding lasts longer, requires less maintenance, and wastes less energy. The truth is this: in almost every instance, installation of synthetic siding will not save energy and maintenance costs. It will last a very long time; there are buildings that still retain their original synthetic siding applications from when they first appeared 50-to-60 years ago. And while that sounds significantly durable, it rather pales in comparison to the fact that there are historical buildings from 200+ years ago that still retain their original wood siding (siding that doesn’t sit many, many years in landfills when it needs to be removed). Synthetic siding won’t only add to landfills, it will also compromise the building’s historical integrity, and can cause irreversible damage to the building. 

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Synthetic vs. Wood Siding: Energy efficiency

  • Since walls are not a significant source of energy loss, synthetic siding proves, at best, a nominal energy savings

The myth that synthetic siding is more energy efficient than wood siding is pervasive and persistent – perhaps because it is easy to fall into the habit of assuming newer is always better. Newer is not always better, and even newer-with-an-insulated-backing is only nominally, if at all, better. The National Park Service’s Preservation Brief No. 3 highlights the fallacy regarding the weight placed on siding for energy efficiency, noting that walls aren’t even where the most heating and cooling energy is lost in historical buildings – the roofing system is. Spending money to replace wood siding with synthetic siding will not usually return the investment in energy savings for this reason. A much more cost-effective focus for energy savings are the windows, doors, and roofs of historical buildings.

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Synthetic vs. Wood Siding: Maintenance

  • Synthetic siding materials require much maintenance and can even create additional maintenance for other parts of the building

Synthetic siding materials are not maintenance-free. Aluminum will dent, and if painted, requires the same amount of paint maintenance as wood siding. To properly maintain and preserve aluminum siding, it must be cleaned regularly. Vinyl is a plastic and vinyl siding is subject to the same pitfalls as any other plastic: it cracks and shatters if impacted, it deteriorates with exposure to the extreme temperature changes of summer-to-winter and back again, and it simply cannot be installed to maintain a tight fit in both summer and winter because of the amount of expansion and contraction those extreme temperature changes cause. Vinyl siding will even interfere with a building’s ability to “breathe” and result in excess moisture retention and airflow problems causing unhealthy air quality for the building’s occupants, actually creating additional maintenance needs for other materials, systems and areas of the building.

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Synthetic vs. Wood Siding: Historical integrity

  • Synthetic siding does not preserve the many features of wood siding applications that contribute to the very fabric of a building that makes it historical

Synthetic siding will compromise the building’s historical integrity. The National Park Service’s Preservation Brief No. 8 explains that the materials of a historical building contribute to its historical fabric, noting that “Preservation of a building or district and its historical character is based on the assumption that the retention of historical materials and features and their craftsmanship are of primary importance.” There are many features that make wood siding of primary historical importance to your building. The tools used, geographically-specific craftsmanship techniques, types of clapboards and how they are manufactured and installed, the profiles, decorative edging, and patterns of application that make historical wood siding worthy of preservation are all lost when synthetic siding is used. For example, wood siding on Mid-Atlantic buildings from the early 1800’s to the early 1900’s had distinctly different looks, features, and craftsmanship techniques than those in New England during the same time frame. The stock synthetic siding options available today simply cannot achieve that same level of variation between historically significant architecture styles. 

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Synthetic vs. Wood Siding: Serious health problems

  • Synthetic siding not only masks the health of a historical building, it deteriorates it, endangering both the building and the people who live or work in it

Synthetic siding causes more serious problems. Wood siding on a historical building is also one of the most easily read indicators of the general health of the building. Paint peeling from wood siding can be an early warning signal that there are moisture problems threatening the building, and can sometimes even indicate where those problems are rooted (e.g., gutters or downspouts that aren’t working, improper flashing/weatherproofing, etc.). If wood siding is replaced by or covered with synthetic siding, it often masks any early signs or symptoms of moisture issues and results in more extensive moisture damage. Not only does synthetic siding mask the health of a building, it deteriorates that health. Since synthetic sidings to not allow a house to breathe the way wood siding does, it exacerbates any moisture problems that are present or develop in the future by essentially locking the moisture in the building. In doing so, synthetic siding encourages the growth of molds that turn the building’s air quality into a toxic environment that endangers the health of its occupants. Vinyl siding specifically also carries other health and safety concerns like the toxic fumes it emits when heated, and the cancer risks currently thought to be connected to the polyvinyl chloride plastic resin vinyl siding is made out of. 

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Synthetic vs. Wood Siding: Damage

  • Synthetic siding can result in permanent damage to the character-defining features of a historical building

Synthetic siding can cause irreversible damage to the building. An uneducated, and often heard argument claims that when need be, vinyl siding can simply be removed if it is applied over top of the original wooden siding. This is in part true, but it is in part reflective of a naïve understanding of what contributes to the historical fabric of a building, and how even seemingly simple changes can result in permanent damage to that fabric. Once again, Preservation Brief No. 8 from the National Park Service sets the record straight. It states, “there is frequently irreversible damage to historic building materials if decorative features or trim are permitted to be cut down or destroyed, or removed by applicators and discarded.” During the installation process of synthetic siding, even if it is only being applied over existing wood siding, the original wood siding can be permanently damaged by furring strips nailed onto the walls to create a flat surface to install the new siding on. Windows, door trim, cornice, decorative trim and molding, and other projecting details are sometimes permanently altered because the cost of custom-fitting the new synthetic siding to retain their character is too much.

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Evaluate your building’s siding:

  • Do any areas of my historical building have synthetic siding materials applied over wood siding?
  • If yes, do I have a plan for restoring the original wood siding?
  • Are there areas of my wood siding that have already been replaced because of deterioration?
  • Were they replaced with comparable wood materials and craftsmanship features?
  • Do they blend in with the original siding?
  • Is my wood siding evaluated regularly and properly maintained? Is it re-painted every 5-10 years?
  • Do I have a maintenance plan and agreement with a qualified and competent historical restoration company to ensure proper maintenance of my wood siding?

 

When most people think about the post-World War II era of the 1950’s, among the things they think about are iconic TV shows like “Howdy Doody” and “The Ed Sullivan Show,” presidents Truman and Eisenhower, Rock-n-Roll, the emergence of teen culture, James Dean and Marilyn Monroe movies, and the Cold War. But historical preservationists equate the ’50’s with Mid-Century Modern architecture.

taylor-simpson-ljhszooqvTI-unsplash.jpgPhoto by Taylor Simpson on Unsplash

WHAT INFLUENCED MID-CENTURY MODERN DESIGN PHILOSOPHIES?

Escaping Nazi oppression, founders of the 1920’s Bauhaus movement, such as Mies van der Roche and Walter Gropius, brought their concepts of clean lines, angular compositions, and simple forms with them to America. The basic tenets of the Bauhaus movement blended with American architectural traditions, particularly Arts and Crafts and Frank Lloyd Wright’s Prairie School designs, and evolved into what is called Mid-Century Modern Architecture, which extends beyond the contraction of houses to furniture and interior design and is characterized by the use of modern materials, horizontal composition, large expanses of plate glass (including sliding glass doors), open floor plans, and are typically one-story residential buildings. Often there are changes in elevation within the home design that make it distinctly different from ranch-style homes, creating a fresh new architecture that didn’t harken back to the past. 

MID-CENTURY MODERN DEFINING CHARACTERISTICS

GENERAL PROPORTIONS
Classic modern houses are one story, spread out, and horizontal

ROOF TYPES 
Flat, sometimes slight single pitch, often asymmetrical

FENESTRATION
Floor to ceiling glass in living sections, horizontal strips in less public areas of the house

STRUCTURAL & FACEWORK MATERIALS
No character defining material … stone, brick, wood siding (both vertical and horizontal clapboard) were all used … possible decoration: larger chimney made of brick or stone

SPATIAL DESIGNATION & FLOOR PLAN 
Very open plans, usually with kitchen, dining area, and living room as one continuous space … carports are common with the roofline acting as an extension of the main horizontal roof … basements and attics are rare

CHIMNEY PLACEMENT
Substantial and made of stone … often appears at the peak of the roof

ENTRANCEWAY
Somewhat formal main entrance with decoration limited to a floor to ceiling glass sidelight … often enters directly into the kitchen or utility room from the carport

COLOR
White initially, with warmer and natural colors introduced later in the period

PRESERVATION CHALLENGES: MID-CENTURY MODERN ARCHITECTURE

Mid-Century Modern Architecture is characterized by its progressive designs and minimalist aesthetics that became popular in the post-World War II era, and contrast with their ranch-style counterparts, due to the fact that the designs make no reference to earlier building styles, like the Colonial Revival. The goal of Mid-Century Modern designers was to create a look that broke with the past, which often lent itself to outlandish details and futuristic elements that might appear more at home in science fiction. 

The way things were built, including houses, changed after WWII. There was a demand for new construction for returning GI’s who needed housing for their families. Prior to the war, during the Great Depression (1929-1939), there wasn’t much new construction outside of public works projects that were created as part of the New Deal, and in the early 1940’s all resources were devoted to the war effort. Due to the housing demand, a system was developed to create housing fast and economically, as expansion into the suburbs, a phenomenon that began in early 1900’s, continued.

GI’s not only needed housing, but also jobs, which increased the existing labor force. Materials were made to be installed by less skilled labor. Manufacturers began making building materials that were meant to be replaced rather than repaired, which created a workforce of product installers rather than skilled craftsman (a trend that continues today). 

The modern construction techniques allowed architects to experiment with forms and materials. Steel framing, first used in Chicago skyscrapers at the turn of the century, was used in Mid-Century Modern buildings, and enabled architects to create the walls of glass and open floor plans that characterize the style. Open floor plans were designed to promote more casual and integrated living spaces that could accommodate a variety of uses. Large expanses of glass framed by thin structural elements allowed for more contact with nature.

So, you own a Mid-Century Modern house, how can you tell if it’s considered an historic structure?
A building older than 50 years (or newer building if a historically significant event took place there), is eligible for the National Historic Register. Of course, there are other criteria, which you can find by visiting the “Eligibility” page at: 

https://www.nps.gov/subjects/nationalhistoriclandmarks/eligibility.htm

and the “How to Apply the National Register Criteria for Evaluation” page at:

https://www.nps.gov/subjects/nationalregister/upload/NRB-15_web508.pdf

 

 

Historical buildings were built when neither advancements in technology nor construction technology was in abundant supply.  Early designers made the most of building materials and design options to construct buildings with a powerful combination of harnessed natural resources and innovative design that worked together to maximize energy efficiency.

Everything from exterior paint colors, locations of balconies, numbers and placement of windows, to physical placement of buildings on lots was carefully considered to maximize heating, lighting, and ventilation in traditional construction.

The results are astounding, and studies have shown that properly restored and maintained 18th-, 19th, and early 20th century buildings can be just as energy efficient as new construction, and in many cases even more efficient.

The historical wood windows in your building contribute to that energy efficiency, and, contrary to urban legends, new replacement windows are not more energy efficient than historical wood windows.  Typically, studies that conclude such a finding have compared new replacement windows with historical windows that have not been maintained or restored, are decaying, and have no complementary energy retrofits, such as weather-stripping and storm windows.

Studies on energy efficiency also usually fail to consider “embodied energy”. Embodied energy represents the energy it took to manufacture a product.  They say the greenest building is the one already built.  This is true when you consider the embodied energy – an existing energy investment that will never be able to be recaptured once you destroy the product it’s embodied in.

Historical wood windows have an embodied energy value that includes all the energy from harvesting and milling the wood to transporting and manufacturing the windows to installing them in your historical building.  Preserving existing windows conserves that embodied energy and eliminates the need of additional energy to manufacture replacement windows.  When you take all energy into consideration for defining the energy efficiency of windows, historical wood windows are far more energy efficient than replacement windows.

Tips For Improving Energy Efficiency

Here are some tips for improving the energy efficiency in your historic home.

  1. Have a maintenance appraisal performed.  When not properly maintained, there are many ways a historic home’s energy efficiency suffers – such as air leaks into and out of the home.  A maintenance appraisal performed by a qualified contractor will locate any source of air leakage and provide you with a plan-of-attack to remedy the problem without damaging the historic aspects of your home.
  2. Schedule an energy audit.  This could really be tied for the #1 spot; both the maintenance appraisal and an energy audit are absolutely essential things that need to be done BEFORE you implement any energy improvement measures.  The energy audit will evaulate your home’s current energy performance and identify any deficiencies in both the envelope of your home and/or mechanical systems.
  3. Implement these findings.  Hire a qualified contractor to eliminate any air infilitration, repair windows and perform the other maintenance affecting your home’s energy efficiency.  Hire a qualified energy contractor to replace any mechancial systems found to be deterimental to your home’s energy efficiecny.  Make sure both of these contractors have a proven track record of working with historic buildings in a way that does not damage the architecture and its features.
  4. Change your habits.  Install timeers or motion detectors on lights, attach self-closing mechanisms on doors that might otherwise hang open, install fans and raise your thermostat temperature, use LEDs in your lights and turn off “vampire” devices that use electricity in standby mode or that use electricity in standby mode or whenever that are plugged into an outlet.
  5. Install insulation. Ther is a lot of misinformation regarding the best ways to insulate your house, and some of them can even damage your home.  Have the historic contractor and energy consultant you hire work together to devise an insulation plan specifcially tailored to your home, so you won’t compromise its architectural integrity.
“We regret much of what we’ve built; we regret much of what we’ve torn down. But we’ve never regretted preserving anything.” -Daniel Sack

Original windows serve a dual purpose of providing ventilation and light while being an important part of the buildings architectural design. These windows are constantly under attack from the marketing forces of the replacement window companies.

Window Restoration

Window Restoration in Society Hill neighborhood in Philadelphia

 

Here’s a horrifying experience recently shared with us:

I was one of those stupid people who put new vinyl windows in my old 1883 farmhouse. I had already spent a winter fixing the old, broken, and cracked windows since no one had lived in my house for seven years. I did show significant saving (on) heating oil the first year since I had storm windows as well.

Fast forward ten years and I am already seeing the gas between the windows escaping. Some of the locks have stopped being cooperative as well. And the warranty? Well, the company no longer makes windows.

And ever since installing the windows, I have had peeling paint on my siding. I didn’t know about siding vents – the kind you stick up under the clapboards – until earlier this year.

This is one decision I wish I could make again – I’d never get rid of my old wooden windows!

Sadly, we hear these kinds of stories all the time (so much in fact we make traditional windows to replace modern replacement windows).

Traditional Wood Windows with Insulated Glass at the Petersen House in Washington, DC

Traditional Wood Windows with Insulated Glass at the Petersen

House in Washington, DC

However, we also know that your wood windows are the prime targets for replacement window companies.

The information homeowners are taught to believe, is that original wood windows are substandard and the only viable solution is to replace them with their very own superior product. Chances are you’ll probably even get a guarantee too!

The original windows are part of your home and integral to the historic fabric of it. Windows are one of the most significant architectural elements, and they serve as both an interior and exterior feature.

Windows that are not properly maintained can become more than an eye soar. The functionality of their original design begins to falter, chilly winter air seeps in and humidity becomes the deciding factor if the window will open this time or remain jammed shut for perpetuity.

Window Lead Magnet Ad

You can be assured that the trusted replacement window sales representative will make sure you are well educated on the seemingly endless array of benefits that can be attained by purchasing their product.

The sales pitch will include such ‘facts’ as your existing single-pane wood windows cannot perform as well as replacement windows!

This incomplete information continues to be perpetuated by the replacement window industry with the goal of you buying their window. Homeowners accepting this information are often being provided data comprised to affirm the idea that original and historic wood windows are inferior to their replacement counterparts.

Single-pane wood windows in disrepair and poorly maintained, cannot perform as well as intact replacement windows or any window in optimum condition.

Wood windows that are not adequately maintained, neglected and in poor condition are often used to base conclusive assessments of the efficiency of replacement windows verses original windows.

It should not be surprising that replacement windows fair better in this scenario.

These comparison studies and their findings are used to influence homeowners, but they do not tell the entire story. In fact, a properly maintained single-pane wood window, weatherized, in conjunction with a storm window (interior or exterior) is equal to a replacement window in energy usage according to numerous engineering studies.

A replacement window may save a few dollars in heating and cooling cost, but to recoup the cost in the investment of a whole home window replacement, it will take you fifty or more years at less than a $1.00 a year in heating and cooling savings according to the University of Vermont study.

Yes, replacement windows do offer double panes (sometimes triple), low U-Values and Low-E glass. The really cheap ones offer a low price point too.
It doesn’t make them better.

Restored windows Franklin and Marshall College Lancaster, PA

Restored windows Franklin and Marshall College Lancaster, PA

Another ‘fact’ that will be citied during the sales presentation is that replacement windows are “maintenance free”.

Maintenance free may imply a solution to a home’s rundown windows, but the solution is not found in mass produced and disposable windows.

Maintenance free means it cannot be maintained or repaired, with the average life span under twenty years, those very same replacement windows will find themselves in a land fill along with their nemesis, the original windows, they replaced. Every material and every part of a window wears, breaks down and needs some type of repair to continue proper functioning.

Fact is, that a replacement window cannot be repaired and cannot continue to work at the same level it was when installed. It is not comprised of the same individual components as traditional windows, it’s a single unit design and constructed as such to make it impossible to disassemble and repair.

When a replacement window fails, its maintenance free selling point becomes the reason you need another replacement window. It also becomes another opportunity for a replacement window company to sell you the latest and greatest ‘maintenance free’ window. The notion that replacing supposedly substandard wood windows with modern replacement worry-free windows, is certainly a misnomer. As in the case study above, homeowners are often disillusioned when the integrity of ten or twenty-year-old replacement windows deteriorate to level where they inevitably need to be replaced – again and again – welcome to the replacement cycle.

Original windows can be repaired and preserved because they predate the era of planned obsolescence. An era when buildings had to work with the environment to keep its inhabitants warm in the winter and cool in the summer. An era in which fixing things was preferred to replacement. An era before the skilled tradesman become product installers with an assembly line mentality of the building trades. The individual components of these windows can each be repaired, maintained or replaced in sections as need be. They were built for longevity, not for replacement.

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They can be preserved and their historical significance doesn’t need to be sacrificed for energy efficiency or functionality.

When an original wood window fails, it can be repaired and repaired again and it isn’t as daunting of a task as you just might think. Replacement window companies cannot make a profit if homeowners routinely maintain their historic windows. The replacement window industries’ goal is to sell as many windows as possible. Our goal is to help you understand there are options that preserve the integrity of your historic building and to arm you with information and facts.

Maintenance measures can be taken to keep historic windows energy efficient, properly functioning and able to last another 100 years:
 Painting
 Caulking
 Weather stripping
 Re-glazing
 And more…

Replacement windows will however permanently alter your homes interior and exterior appearance. Losing the detail and elegance found in the workmanship of true divided lights, wavy single pane windows, rails, muntins, profiles, depths and sills will be lost and replaced with flat and shadowless details, meant to replicate what was once there. Understanding the materials and traditional joinery used to build your original windows are superior to any replacement window is an important factor in deciding whether to restore or replace.

Challenging conventional knowledge on what it takes to maintain historic windows isn’t as daunting as it may seem. However, it requires shifting the paradigm of thought – understanding that maintaining your original windows can be a simple task and the reason to replace your windows is not to save energy costs or have zero-maintenance. 

Watch the video below to learn more options for your original wood windows.

There are a variety of tasks that can be done on a regular basis to extend the life of a porch. In addition, a visual inspection of the porch should be made every spring and fall to determine if more in-depth repairs are necessary. Fortunately, ongoing maintenance significantly reduces both the need and cost for later repair work and represents good preservation practice. When properly maintained, a well-constructed porch can last for decades.

Routine Cleaning and Other Surface Work

Since many porches are essentially another living space, extending housekeeping to this space makes practical sense. Regular maintenance includes sweeping the wood porch decking, and, if needed, an occasional damp mopping. Removing dirt and leaves by sweeping is preferable to frequent hosing off the deck with water. The latter can saturate the woodwork, thereby promoting decay. Frequent sweeping will reduce the accumulation of abrasive materials, such as dirt and sand. While visually pleasing to some, vines and plants should be kept trimmed away and not be trained to grow onto or allowed to grow beneath porches. Plants and vines unfortunately reduce ventilation, promote a moist environment for insects and decay, accelerate open wood joints and impede cyclical maintenance. As an alternative, traditional freestanding trellises can be used to support plant growth away from the porch.

There are certain precautions that are recommended for wood floors. Rubber mats, rugs or indoor/outdoor carpeting can trap moisture and condensation on their underneath side and should not be used on a wooden porch floor. Keeping flower pots up off the wooden deck will help prevent moisture buildup and decayed spots – wood, clay or metal “trivets” that hold the pots an inch or more off the wooden deck are helpful, but the pots should be moved to different locations periodically. In colder climates, light snow can be swept off the porch. Snow shovels with a hard rubber leading edge or plastic shovels cause less damage to wood than metal, while paint in good condition helps ice to release more easily. Sand or clean kitty litter can be sprinkled on ice to prevent slipping; however, they should be later swept off the porch, as they are abrasive. Salt (sodium chloride) is not recommended for ice removal on older porches as it can promote corrosion and failure of nails and other fasteners. Magnesium chloride is an alternate de-icing salt that is less corrosive and less damaging to masonry and plants. If any de-icing salt is used, be sure to scrub and rinse off the porch deck in the spring. Boot scrapers and brush-mats at the bottom of the stairs are recommended for muddy areas.

Painting

45-painting-porch

Decay can start when wood is left exposed to the weather or where joints open up. An inexpensive way to extend the life of the existing porch paint without jeopardizing the historic material is spot paint and caulk where needed every year or two. This cost-effective procedure is particularly effective in maintaining wood porches where the exposure to weathering is high. Photo: John Leeke.

Spot painting and resealing of open joints should be undertaken at least every other year. Heavily used stair treads may require more frequent paint touchup. When peeling paint or bare wood is evident, inspect to ensure it is not signaling deeper problems, such as decay. With sound wood, scrape off the loose paint, sand, prime, and repaint the area. Where lead paint is present, appropriate lead hazard precautions and procedures apply. Only top-quality exterior primers and paints are recommended, selecting for the deck and stairs specially formulated paints. Where wood porch steps are exposed to moisture, grit added to the wet paint during application will help improve safety.

Repair

Many repairs may be successfully undertaken by property owners, while major projects often require the special knowledge and equipment of an experienced contractor. Repairs generally include patching and reinforcement of historic materials. The roof and foundation are particularly important to the preservation and the structure of a historic porch yet they often receive much less attention than ornamental features. Their neglect will usually lead to more costly work. Repairs to features such as a balustrade or flooring can encompass limited replacement in kind when the porch part is severely deteriorated or when a part of a repeated feature is missing altogether. Some common porch repairs are discussed in this section.

Filling Open Cracks or Joints

To seal open cracks or joints, start by scraping off the paint back a few inches from the opening and removing old caulk to expose bare wood. The opening should be examined for any signs of wood decay, and to determine if the joint is loose due to a loss of connection, such as rusted nails. After correcting any problems, apply a water-repellant wood preservative that can be painted. Such preservatives are either an oil-based or waterborne solution of oils or waxes with mildewcide, fungicide and pesticide added. Then apply a high quality exterior wood primer to the wood surfaces where a sealant or caulk is to be used. Most open cracks or joints then can be filled with a sealant or caulk, while larger ones may need the addition of a backer rod. In some cases, small metal flashing over the crack or open joint may be more effective and longer lasting but, when used, care should be taken with proper installation. The final step is painting.

Patching with a Dutchman Repair

end

The ends of porch roof rafters are often susceptible to moisture decay. When concealed by a soffit or ceiling, rafters can be repaired by adding new sister boards. Where roof rafter ends are exposed, splicing new wood onto the old (dutchman repair) and use of epoxy consolidants and fillers both preserve sound historic fabric while retaining the historic appearance. Photo: Paul Marlowe, Marlowe Restorations.

This traditional technique is often used to repair localized cases of decayed wood and, when undertaken with skill and care, will serve as a permanent repair. If the damaged area has a structural function, temporary bracing or other support will be necessary. Otherwise the first step after removing any paint around the damaged area is to chisel or mechanically remove the decayed wood. It is best to use the same type of wood being replaced and the new or recycled wood should be seasoned to avoid shrinkage. The repair procedure involves cutting a piece of wood, called a dutchman, slightly larger than the area of damage that has been cut out. The dutchman then is laid over the damaged area and an outline scribed into the original wood surface below. Next, a chisel or router is used to follow the scribed line to form an opening in the existing wood for the new piece. As a preventive measure, an appropriate fungicide should be applied to the surrounding old wood and allowed to dry. The dutchman is then glued into place with waterproof adhesive, such as an epoxy formulated for wood. The repair is finished by trimming or sanding the surface of the new wood down flush with the surrounding existing surfaces, priming and painting.

 

Patching with Epoxy or Wood Fillers

There are a variety of commercial wood fillers. Cellulose based fillers consist of wood fiber and a binder and have been available in stores for many years. Only those suitable for exterior applications should be used and they will require a protective finish. Epoxies are a more contemporary product, commonly used by experienced contractors and woodworkers. Epoxies are petroleum-based resins created by mixing two components in accurate proportions that result in a chemical reaction. The result is durable, moisture-resistant consolidants and fillers that bonds tenaciously with wood, and can be sawn, nailed or sanded. Epoxies are for use only in areas that will be painted, as they do not take stain and deteriorate under sunlight. Since epoxies are more difficult to work with than other wood fillers, experience working with epoxies is needed for successful repairs.

Repairing Railings and Balustrades

Balustrades and railings are not only practical and safety features, they typically are highly visible decorative elements. Unfortunately, balustrades and balusters are frequently altered, covered, removed or completely replaced even though in most cases they can be repaired in a cost-effective manner. To preserve historic fabric, the repair of old balustrades and railings is always the preferred approach. A broken baluster usually is one in need of repair, not replacement.

Loose railings and balustrades present unsafe conditions and need to be repaired as soon as possible. Start by examining the points of attachment to determine exactly why the railing or balustrade is loose. Common reasons include rusted fasteners, decayed wood, or physical stress that has broken the fasteners or split the wood. Paint and decayed wood must be removed. Where fasteners are broken yet the wood is sound, the balustrade can be re-fastened using hot-dipped galvanized or stainless steel nails or screws, setting the heads of the fasteners below the surface of the wood and using a wood filler to cover and seal. Next repair deteriorated wood by using a dutchman or wood-epoxy repair. The repaired joints then can be sealed and painted.

Replacing Missing Balusters

The balusters help comprise a wood balustrade and come in three general styles: simple rectangular shape; flat, pattern-sawn (usually a board with some decorative edge or cutout); and turned. It may be necessary to replace certain balusters that are beyond repair or missing altogether. Some are easy to replace with new matching balusters while others can be more challenging in terms of both design and costs. Finding or affording replacement balusters may take time since they should match the historic baluster as closely as possible. In the meantime, unsafe balustrades can be temporarily stabilized, introducing temporary new material that soon will be replaced.

In replacing individual balusters, simple, rectangular balusters should not be replaced with pattern-sawn or turned ones unless physical or pictorial evidence survives which indicate they previously existed historically on that particular porch. Such an alteration can change the historic appearance of the porch or be incompatible with the character of the building.

Determine the size and shape of the missing balusters either by examining adjacent ones or temporarily removing an existing baluster as a sample. Heavy paint buildup should be removed so that the original dimension can be established. Scrape and clean the joint locations and make repairs to any deteriorated areas. A new baluster is then fabricated to match the original in design and material, either on site or by taking a drawing or sample to a local woodworking shop. The new baluster should be made one-half inch longer than needed on both ends. Measurements are taken from the bottom surface of the top rail to top surface of the bottom rail. Joints on the new baluster can be laid out with a pencil, using a sliding bevel to transfer any angles, and the new baluster trimmed to fit with a handsaw. After test fitting, the ends and any exposed end-grain of the baluster need to be sealed with a high-grade primer or epoxy. Next, apply a paintable water-repellant coating to all exposed wood surfaces, and apply a primer. The baluster can then be fastened in place with hot-dipped galvanized or stainless steel nails, and the nails set. Finally, seal joints and fastener holes and paint the baluster.

Repairing Column Plinths and Bases

column-both

This nineteenth century porch column is made of wood staves, similar to the way a wood barrel is put together. After replacing the torus and making dutchman repairs to the apophyge along the base, the column and pedestal are ready to be reinstalled on the porch. Photos: NPS files.

Columns not only enrich the historic character of the porch, they provide support for the roof structure above. Because of their detail and complex construction they can be costly to repair or replace, making maintenance and minor repairs important. Column plinths and bases tend to deteriorate because of their exposed location on the outer edge of a porch. Leaking gutters can result in water draining into the entablature and down into hollow columns, while clogged or capped gutters can allow water to pour down and splash back onto the column bases. Open joints and limited wood decay can be repaired using methods previously discussed. Column repairs usually are undertaken by an experienced carpenter, since it may involve structural support of the roof above.

Repairing Floorboards and Ceiling Boards

Floors should slope down toward the outer porch edge for proper drainage. If drainage is inadequate, moisture buildup will cause deterioration of the floorboards. Flooring can also deteriorate due to movement in the supporting structure below. If a floorboard is soft or broken, the extent of decayed or split wood can be determined by probing gently with an awl. The existing floorboard can then be removed, cutting the length if needed so that the end will center on the next nearest joist or girder. Once the board has been removed, the structural framing beneath should be examined for deterioration and to ensure it is sound. A new floorboard is then cut to length, and the outer edge shaped to match the adjacent boards. After priming the replacement board, nail it in place and repaint.

If a section of the ceiling is deteriorating, it is likely that there is a roof or gutter problem. To determine the cause of deterioration, inspect the ceiling, gutters and roof, including the internal roof structure. After making necessary repairs, the ceiling boards can be repaired in much the same manner as a deteriorated floorboard.

Repairing the Porch Roof and Gutters

With roof leaks, the entire porch is at risk. Leaks can promote decay in roof rafters, ceiling joists, and columns as well as in areas more easily to detect such as the ceiling and fascia. Inspect the roof covering, gutters and flashing for deterioration and improper performance. They can then be repaired or replaced, as needed, to keep water out of the structure. Avoid having the gutters and downspouts on the main roof drain onto a porch roof.

Repairing the Foundation

Unstable foundation supports can cause serious damage to a historic porch. There are numerous causes and solutions. If the posts supporting the porch deck rest on stones or brick set directly on the ground, there can be seasonal shifts due to the changing moisture content of the soil or freeze/thaw conditions that will require regular attention. Under certain conditions, it may be advisable to extend footings for the posts below the frost line. Where moisture problems exist, improved drainage may be necessary. It is not uncommon to find that masonry joints in the foundation wall or piers have deteriorated as a result of rising damp, where moisture from the soil percolates up through mortar joints. This condition may lead to the eventual breakdown of the mortar and even old brick and soft stone. In such cases, it will be necessary to replace the areas of damaged masonry and repoint the mortar joints.

With wooden posts, insect damage or rot may necessitate corrective measures to strengthen the foundation. Techniques can include one or more of the following: epoxy consolidation; dutchman repair; or the addition of supplemental supports to the foundation posts and joists. In some cases damage may be extensive enough that the only real solution is rebuilding the foundation.

Repairing a Porch Apron

The apron, skirt, or latticework is a highly visible and functional porch feature. An apron keeps animals out from under the porch, while at the same time allowing air to circulate, preventing unwanted moisture buildup. Aprons typically are made up of a wood frame, surrounding either a simple lattice or a repetitive pattern of decorative sawn boards. Because the frame is so close to the ground, decay is common. Other causes of decay include plantings around the house that are growing too close to the latticework and improper water drainage. An apron may require partial or complete disassembly for proper repair. One or more of the apron frames should either be hinged or secured with turn buttons for easy access to under a porch for inspection and maintenance.

Replacement

When individual porch parts are deteriorated beyond the point of repair or missing altogether, replacement is necessary. To retain the historic character of the porch, the replacement parts should match the historic component as closely as possible in material, design, color, texture, and other qualities. To achieve this, existing evidence of the historic design, such as a baluster or column detail, or a tongue and groove floor design, should serve as a pattern for the replacement part. When replacing an element, it may provide a good opportunity to upgrade the wood to another species that is more decay resistant, or to one with a vertical grain that is more resistant to cupping or splintering. In limited cases, it may be appropriate to use a substitute material for the replacement material as long as it conveys a close visual match. Before replacing a deteriorated historic porch component, it is important to understand how it was constructed and installed, and what lead to its deterioration. If the replacement part does not sufficiently match the historic part, the character of the porch may be diminished, or even lost. If the cause of material failure is not addressed, the replacement will also fail.

Replacing Porch Floorboards

If a large section of the porch floorboards is deteriorated, the framing beneath may also be damaged and should be assessed. Replacing floorboards can often expand into repairing the structural sills, girders, and joists beneath. Complete floor replacement will likely require the removal of floorboards that are under structural posts or columns. This may necessitate the careful stabilizing in place or the removal of the posts or columns and the installation of temporary support for the roof structure. If the floor failure was caused by inferior wood, the wood quality can be improved at this time. However, the new wood flooring should match the existing in thickness, width, shape and texture. The slope of the floor should be maintained, or a slope may need to be created if none exists. A slope of ¼ inch per foot or greater, away from the house, is needed for adequate drainage. Boards are usually laid in the direction of the slope, sloping down to the outer edge of the floor.

Replacing Steps

Porch stairs receive heavy usage and are close to the ground, making them predictable candidates for deterioration. Stairs should be repaired or, if necessary, replaced by an experienced carpenter who understands the safety codes and is experienced in fabricating custom stair parts to match original detailing without depending only on store-bought parts.

shaft

The lower shaft of the porch columns had decayed as water wicked up through the end grain (top). The column shafts were repaired in place by cutting out the deteriorated wood and making repairs using epoxy consolidants and fillers. (bottom). The column bases were replaced. Photos: Paul Marlowe, Marlowe Restorations.

Replacing Column Plinths and Bases or Entire Columns

When plinths and bases are deteriorated beyond repair, they can be replaced without replacing the column shaft, which may still be in good condition or require only minor repairs at the bottom. Such replacement will involve temporary shoring for the roof. One-story columns and shafts are often more easily removed during this work, while taller columns are sometimes supported in place. If only a few plinths or bases are deteriorated, it is often economical to have new ones made of wood to match. If numerous plinths and bases are deteriorated, replacing with bases made of rot-resistant materials can make economic sense; however, care must be taken to ensure that all the visual qualities including design, size, shape, color and texture of the historic part are matched.

Entire columns may need to be replaced, but an owner should first consider all repair alternatives. Some contractors routinely recommend complete replacement of one or all columns due to the challenge of a clean repair (particularly with stave-built columns), or because they see the potential for more profit in complete replacement. If a contractor recommends complete replacement, other opinions should be sought to ensure repair is truly not feasible. Preserving the historic appearance of old columns is not the same as preserving historic columns.

Where a replacement turned or staved column is needed, a local millwork may be able to match the profile or pattern. Alternatively, the Internet is helpful in identifying potential sources of replacement columns that can match the appearance of the remaining ones.

wood

Replacement Materials

Wood

When selective replacement is necessary, the key to success is the selection of suitable wood. Dimensional stability, decay resistance and paint holding ability are wood characteristics that effect durability. Wood that expands and shrinks too much can cause paint to crack. Substances found naturally in certain kinds of wood repel fungi and insects that destroy wood. Selecting wood that is relatively stable and naturally decay resistant helps avoid problems.

The wood from trees cut one and two centuries ago was much different than most wood available today. The mature trees in older forests grew very slowly and, as a result, the annual growth rings were very close together. Today, trees grown by commercial companies for their lumber are fast growing so they can be harvested sooner. As a result, commercially farmed trees have annual growth rings much further apart, resulting in the cut lumber being less strong and decay resistant than older timber. These differences in quality are one of the reasons it makes sense to save old wood when possible.

Wood Selection: When choosing wood for repair and replacement work, the species, grade, grain and environmental impacts should be taken into consideration. This is especially applicable to historic porches because of their high exposure to the weather and vulnerability to decay. The best species are those with good natural resistance to decay, such as redwood, cypress, cedar or fir. A clear (knot free) grade of wood is best; however, if clear wood is not readily available or too expensive, a grade with small or tight knots is acceptable. Finally, the use of more stable vertical grain lumber is preferable to flat grain boards. Vertical grain lumber expands and contracts less with changes in moisture content, resulting in reduce warping and checks. Paint thus will hold better. The downside to using vertical grain boards is the cost, which tends to be as much as two to three times the price of flat grain lumber in the same grade and species. However, this expense is typically recovered through lower maintenance costs over the years. Thus, a decay-resistant, high-grade, vertical grain lumber is the best choice for the replacement of deteriorated porch elements, particularly flooring, stairs and milled elements such as balusters and moldings.

The best species to choose will vary depending on the region the house is located. For example, in the South, cypress is more available, making it the selection of choice in the region. Because of this wood’s relative ease with which a carpenter can shape it, cypress is a good choice for replacing brackets and trim boards on a porch. In contrast, vertical grain Douglas fir is less workable, but is a very good choice for the replacement of porch floorboards in most climates. Although Douglas fir is from the Northwest, it is generally available throughout the country. For most protected trim boards on porches, white pine is a good choice as it is easy to work and is moderately decay resistant, especially if the wood is back-primed before installation. Availability of any specific wood will change annually based on market supply and demand.

Chemically Treated Wood: Chemical wood preservative treatments are available to resist insect and fungal attack, but care should be taken to avoid using ones that may cause environmental or health risks. Borate preservatives can be applied to surfaces or injected to penetrate and protect the entire volume of the wood. Preservatives with zinc napthenate can be applied to the wood surface, where necessary, especially to protect hidden joinery and the end grains of wood. Water-repellants can also be used to help seal out moisture. Finally, primers and paints should be applied to both protect the wood and to maintain the historic character of the porch. Note that these treatments are different than those used on most pressure-treated wood, which is typically a plantation-grown southern pine of lower quality that is impregnated with chemicals. Pressure-treated lumber can be effective when used for hidden structural members like posts, joists and sills. However, because typical pressure-treated wood is very susceptible to the deterioration of checks, warping and splitting, especially when left unpainted, it is not a good substitute for the better quality wood that is needed for visible finish porch parts.

 

Stock Components

For over a century, prefabricated architectural parts have been sold through catalogues or at home improvement stores. Some companies still make generic, stock architectural components in the same general sizes and designs as those that were first manufactured. These components can be available in both wood and substitute materials. Thus, it may be possible to replace a historic stock component, such as an architectural grade column, with a new prefabricated column that matches the original. Unfortunately, these replacement parts are not designed to match the historic parts of any particular porch. Because traditionally there were many different porch elements, a wide range of styles and considerable regional variations, stock replacement parts available today are not often found to match what is needed in a specific porch repair project. When faced with deterioration of a few porch parts, all the historic material should not be removed in favor of a readily available stock design that does not match the historic appearance. The expressed goal may be to create a porch with a “consistent look,” but this approach diminishes the building’s historic character and authenticity.

Plastic and Composites

A variety of modern materials are marketed today as a substitute for wood. They are usually composite materials typically in the form of plastic resins, including vinyl (PVC), fiber-reinforced polymers and polyester resin. There are other products on the market as well, including medium density wood fiberboard and composite fiber-cement boards. The market is ever changing with the introduction of new synthetic materials and the re-formulation of existing ones. The more costly synthetic products tend to offer the best potential for matching historic features while offering good durability. This means that potential cost savings over new wood tends to be more long term than immediate. Such products generally are not carried in local home improvement stores but rather are available from building supply companies or direct through catalog sales.

The historical significance of a particular property and its porch influences decisions regarding possible use of substitute materials. In general, greater emphasis is placed on authenticity and material integrity when maintaining and repairing individually significant historic properties. However, a front porch that is repeated on rowhouses may be one of the defining characteristics of the historic district and thus of importance to the entire streetscape. So, too, can the location and appearance of a porch influence material decisions, as with, for example, a prominent front porch with ornate detailing as opposed to a small porch over a rear door.

Thus, when the historic porch contributes to the historic character of a building, the particular substitute material that is being considered should accurately match the appearance of the wooden feature being replaced. Composite materials that can be routed or shaped in the field to match specific pieces being replaced have greater potential for use in repairing a historic porch. Materials that cannot be shaped to match the visual appearance of the historic pieces being replaced usually are not suitable for use on historic buildings.

Substitute materials need to be finished to match the appearance of the historic elements being replaced. In nearly all cases, this means that the material should be painted, or where historically appropriate, stained as with some porch ceilings. While there are substitute materials being marketed as pre-finished with either a plain flat surface or generic wood-grain texture, select those that can be painted or stained in the field.

When a substitute material is to be used in conjunction with existing or new wood material, it is important to consider the differences in expansion and contraction due to temperature and moisture changes. Before making a decision, it is also important to understand how a particular substitute material will age, what its maintenance requirements are, and how the material will deteriorate. For example, sunlight can break down exposed surfaces of plastic resins, so painting the surfaces is needed just as with wood. Low and medium density plastic foam parts are easily damaged by abrasion and physical damage, exposing the interior foam to weathering.

Wood porches are just that, porches made out of wood, just as a brick houses are made of brick and cast-iron porches are made of cast-iron. The type of materials used historically in the construction of a building helps define its character. Limited use of substitute materials that closely match missing or deteriorated features may not endanger this historic character, but wholesale replacement with substitute materials usually will.

 

Considerations for Contemporary Alterations

Enclosures

A porch

This old porch enclosure, located on the back side of a house, has acquired significance over time and is remarkable both in the appropriateness of its detailing for use by others today, as well as its high degree of maintenance. The enclosure is set behind the columns; the balustrade has been retained; and the light divisions and the size of the glass panes echo that of the windows above. Within each bay there are two well-crafted, inward swinging doors, providing for greater seasonal use of the porch. Photos: Charles Fisher.

Much of the character of a historic open porch is clearly its openness. Therefore, in most cases, a historic open porch should not be enclosed. If a porch enclosure is being considered, its significance and location—as well as the nature of the planned enclosure—play key roles in whether it can be done without changing the porch’s and building’s historic character. While it is almost never appropriate to enclose a front porch on a historic building to create interior space, enclosing a less prominent porch on a less visible elevation could have less impact. In addition, an enclosure should retain as many of the historic porch features as possible.

Insect Screening and Awnings

Traditionally, the seasonal use of porches was extended with screens and awnings. Screened porches have been popular since the advent of inexpensive and durable wire insect screening in late 1800s. Screens were often set unobtrusively behind railings and columns so the decorative components of the porch remained prominent and visible. Since screens can be damaged easily, the screening material was often set in slender, easy to repair, removable wood frames that could be installed during the warmer months, and stored in the winter. When screening a porch today, this historic precedent is recommended. Screened panels should have minimal wood framework painted either to match the porch or in a darker color to make the framing less visible. Decisions on whether screens should be installed inside the porch railings and posts, between the posts, or on the outside will depend on local traditions and on the design of the porch and trim. Screen doors on porches should be sized to fit proportionately with the porch, made of wood, and hung to swing out so insects are not brought inside with use.

Awnings, drop curtains, and valances were common porch accessories during the nineteenth and well into the twentieth centuries. Both functional and decorative, these canvas features helped shield porches from the sun’s direct rays, while their colorful stripes embellished and complemented the house’s exterior. Some awnings were fixed in place; others were of a roller assembly that allowed owners to easily lower or retract the awning, depending on weather conditions.

Today, modern solution-dyed acrylic fabrics—materials that resemble, but are more durable than canvas—are often used on porch awnings and drop curtains. When new awnings are installed on a historic porch, the selected awning should be appropriate in shape, material, size and color. Care should be used not to damage existing historic porch features such as columns or cornices.

Temporary Enclosures

Temporary enclosures allow a porch to be used in colder months while not permanently altering its appearance. In fact some have become historic features of buildings. Particularly in New England, there is a continuing tradition of installing relatively substantial glass and wood panels on porches during the winter, especially around an entrance door. These tended to have small divided lights. Sometimes porches were fully enclosed with a divided light glass door for entry, creating an enclosed vestibule that reduced the amount of cold air entering the house when the door was opened. Others consisted of simple sidewalls perpendicular to an existing entrance door, serving as a windbreak. Such enclosures were generally removed in the spring.

In recent years, some porches have been enclosed during the winter with plastic sheeting (polyvinyl) for perceived energy conservation or for creation of an enclosed space. Such a treatment generally diminishes a building’s historic character and is not recommended for highly visible porches.

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Particularly in New England, there is a cold weather tradition of installing temporary glass and wood panels at entrance doors, thereby creating an enclosed vestibule. These enclosures with their small divided lights were generally removed in the spring. Photo: John Leeke.

New Permanent Enclosures

Enclosure of a historic porch can result in significant changes in the appearance and character of the building. When considering the possible enclosure of a porch, a number of questions and concerns should be successfully addressed.

Is the porch on a significant elevation of the building? A porch on a prominent elevation was there to be seen and its open qualities are visually important. Enclosing such a space should be avoided.

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The enclosure of a prominent porch can dramatically change the historic character of a building. The L-shaped porch on this 1896 Shingle-style New England residence was later enclosed with aluminum windows and screens. Recent owners elected to reopen the historic porch. Among the other work, it was necessary to correct structural damage, as with this post, where beneath the wood casing carpenter ants had done serious damage. In reopening the porch, the historic character of the residence has been brought back and the traditional use of the porch is once again enjoyed. Photos: Mark Landry, Landmark Services.

Is the enclosure necessary?An enclosure will undoubtedly change the porch as a historic feature and may result in damage or loss of historic materials. Depending on the significance of the porch and the nature of the building, a new porch enclosure may also change the historic character of the building. Consideration should be given to alternate solutions such as recapturing underutilized space in an attic or basement .

Is the porch a highly distinctive feature of the building? Even porches on secondary and rear elevations can be distinctive, such as a two-story porch on the side ell of a farmhouse. Porches ornamented with decorative trim that embellishes the house can also be distinctive. Enclosing these features should also be avoided whenever possible.

Is the porch a feature repeated on a row of buildings in a historic district?Open front porches on a block of row houses can be not only important to an individual building but can also make up a significant feature of the streetscape. Enclosing such a porch usually is inappropriate even if a porch on an adjacent building already has been enclosed.

Will the proposed enclosure encompass the entire porch? History has shown that the enclosure of a portion of a porch on a secondary elevation does not always alter the character of a building. In the past as indoor plumbing was introduced to old buildings, the partial enclosure of a one or two-story porch on a secondary elevation was a convenient means of providing new bathroom space while limiting disruption to the building’s interior. Since early bathrooms were traditionally small in size, most of the existing porch could be retained as open space. It was common to create new walls set either between columns or behind them, since the columns usually served a structural as well as decorative purpose. Where sleeping porches with full-length louver shutters were present, the new wall could simply be set behind and the shutters retained and fixed in place. In both cases the resulting effect minimized the impact of the partial enclosure on the appearance of the building. This also provides us with an approach that may be appropriate for a particular project today.

Will the enclosure result in the loss of considerable historic fabric? Unless the historic porch is so deteriorated that it is beyond repair, any consideration of enclosing all or part of a porch should incorporate retention of historic fabric. This may mean that the existing structural system needs to be augmented but generally not replaced. Distinctive features such as columns, brackets and balustrades should be retained and the new wall set behind them.

Is the foundation adequate for the enclosure of the porch and the new use of the space? Porches were often built on simple posts or piers, some with only minimum footings. Such structural supports may be inadequate to carry the added load of the proposed changes and the typical low space beneath a first floor porch may make installing a new porch foundation difficult and expensive. Such installations may result also in an extensive loss of historic fabric.

How will the proposed enclosure be viewed from the outside once the interior space is furnished? One of the approaches to enclosing a porch is to utilize near full glazing set behind existing columns in an attempt to retain a feeling of transparency. Whether such a treatment is successful depends on how it will look once it is constructed and how will the appearance on the outside be impacted by interior lighting, mechanical systems and furnishings. The traditional use of plantings and porch awnings for shade also provided extended privacy. If historically appropriate, an existing or new awning and plantings may help to reduce the impact of a porch enclosure on a secondary but visible elevation.

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A traditional technique of porch enclosures still used today involves the insertion in each column bay of one or more glass enclosures set in wood frames . This enclosure is properly set back an entire porch bay from the front of the house and utilizes traditional light divisions and wood frames. The balustrade, added here for illustration purposes, shows the importance of retaining this linear feature within the enclosed bays. Photo: Charles Fisher.

Is the design of the proposed porch enclosure in keeping with the historic character of the building? Where the enclosure of all or part of a historic porch is appropriate, the selection of a compatible design and materials is important. Windows, doors, and wall material selection, along with how the new infill fits within the existing porch, are all factors to consider. A traditional technique of porch enclosures still used today involves the insertion in each column bay of one or more glass enclosures set in wood frames. The enclosures are located between or behind the columns, depending upon the nature of the porch, and mimic the pattern or size of glass panes found in historic windows on the building (Figure 15). An alternate treatment involves the use of much larger sheets of clear, non-reflective glass recessed behind the porch supports, balustrade and railing. This more contemporary treatment may be appropriate, depending upon the historic character of the building, location of the porch, and other factors. Windows, doors, and wall material selection, along with how the new infill fits within the existing porch, are all factors to consider.


 

Historically Sensitive Storm Windows

A Product Recommendation from Chuck

When storm windows first came into use to promote energy efficiency, they were installed on the outside of the house.  Not only did this take away from the architectural integrity of the house by impeding the view of major architectural features in windows, they also often created moisture on the outside of the window.

Fortunately for historic homeowners today, we have better options now.  And the option we recommend here at Historic Restorations are the interior storm windows by Allied Window.

historic preservation contractors, historic restorations contractors, historic building maintenance, historic building energy efficiency, storm windows for historic buildings, historically sensitive storm windowsAllied offers an “invisible” storm window installed on the inside of the window.  One of the major benefits of this storm window option is that it has a low profile that doesn’t limit visibility of a window’s historical architectural features.  Made from aluminum they can also be painted any color – send them a sample of the color of your trim and they’ll match it for a seamless integration into your window’s look.  They also have a good seal with an aluminum u-channel across the top, magnetic strips that the aluminum frame attaches too, and a rubber or brush seal that sits on the sill.

They do offer an exterior option with the same features of the interior.  Some people think this would be the better option, that an exterior storm window would help protect the wood in their window.  I don’t recommend this option – wood needs to breathe moisture and if there is a storm window installed on the exterior moisture will be trapped in the wood and promote rot.

We’ve had a good long-term experience with Allied.  We’ve tried other companies, much to our dismay, and Allied is the one that has provided a consistent service and product performance over time.

You can learn more about the products that Allied Windows offers by visiting their website at alliedwindows.com.