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HISTORIC WOODWINDOWS
Repair vs. Replace
Windows Need Work?
Assess overall condition Painted shut Weights dropped Ropes frayed/ stuck Broken glass Glazing chipped, broken Sash or frame rotted/
termite damaged
The Dilemma: Repair vs. Replace
Historic Wood Windows vs. Modern Replacement Windows: The Issues
Aesthetics/ Historic Integrity
Longevity/ Maintenance
Energy Savings
Environment
Economics
Historic Wood Windows: Aesthetics
Appropriate for home style Retain historic integrity/
original fabric of your home Custom shapes and styles
difficult/expensive to replace Appropriate historic profile
“Historic wood windows are an important part of what gives your older building
its character.”
Replacement Windows: Aesthetics
Style/ configuration/ shape/ size Inaccurate historic profile
(muntins, frame) Inappropriate installation details
(sills, mullions, casings) Bright white….
Historic Wood Windows: Longevity Your wood windows already have a
75+year track record of service Infinitely repairable with standard tools Made of old growth lumber
“If your wood windows are 60 years old or older, chances are that the wood they are made of is old growth—dense and durable wood that is now scarce. Even high-quality new wood windows, except for mahogany, won’t last as long as historic wood windows.”
Replacement Windows: Longevity
Replacement wood windows Poor quality of wood rots in Florida’s
climate Vinyl , metal, metal clad Generally a 20 year max. life for
replacement windows Not repairable (No Maintenance=Can’t be
Maintained) Springs give way, seals break, glass clouds Replacement windows are called
“replacement” for a reason. Manufacturers often offer lifetime warrantees for their windows. What they don’t make clear is that 30% of the time, a replacement window will be replaced within 10 years.
Historic Wood Windows vs. Replacement Windows: Energy Savings Studies have demonstrated that a historic wood window,
properly maintained, weather-stripped and with a storm window, can be just as energy efficient as a new window
Windows contribute only 10-12% of overall infiltration to the building envelope. Much more infiltration occurs at roof eaves, foundations and even through wall receptacles, dryer and plumbing vents and fireplaces.
According to studies, it can take 240 years to recoup enough money in energy savings to pay back the cost of installing replacement windows
Opening your windows during temperate months in Florida (and turning off your AC) provides better energy savings
More cost effective energy savings ideas include awnings, shutters, window treatments… plus insulation, caulk/seal, solar attic fans…
Historic Wood Windows: Environmental Issues
Embodied energy=energy to produce existing windows
Lead concerns with rehab of wood windows
Replacement Windows: Environmental Issues
Energy required to construct new windows Replacement windows that contain vinyl or PVC
are toxic to produce and create toxic by-products Each year, Americans demolish 200,000 buildings.
That is 124 million tons of debris, or enough waste to construct a wall 30 feet high and 30 feet thick around the entire U.S. coastline. Every window that goes into the dump is adding to this problem.
Aluminum, vinyl and glass are among the greediest materials in terms of energy consumption and resource depletion
Historic Wood Windows: Economics
Cost to replace vs. repair
Life cycle cost Maintenance vs.
future replacement Return on
investment Energy Resale value of
home
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