Archives: FAQs
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What is “Low E” and how does it work?
“Low E” is short for “low emissivity” and is a thin metallic coating that helps improve the thermal efficiency of windows. There are two main types of Low E coating: hard coat and soft coat. Hard coat Low E, also known as pyrolytic coating, is sprayed on during the float glass process and is easier…
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What are jamb extensions?
Originally indicating the vertical members of the frame, the term “jamb” has come to mean the frame in which a window or door sits. Jamb depth varies between window manufacturers — vinyl windows typically are 2 5/8” to 3 3/8” thick while wood windows range from 3 1/2” to 4 9/16”. In turn, jamb extensions…
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What is a “DP” rating? Is it like a “PG” rating?
A “DP” or “design pressure” rating is a numerical value given to a building component that represents its ability to withstand a given amount of wind load. DP ratings represent three performance elements — structural load, water resistance, and air infiltration resistance. A higher DP value indicates a window or door that can withstand more…
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Why is moisture forming on or in my window?
It depends on where the condensation is forming: Inside your window – When condensation forms between panes of glass in an insulated glass unit, the seals have most likely failed and the glass might need to be replaced. We can help you determine if replacement can be covered under the manufacturer’s warranty, and are happy…
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Even accounting for the difference between western and eastern windows manufacturers, many windows have odd sizes. Why is that?
The “rough opening” is the framed opening in your wall for the window to fit in. Rough openings are usually sized 1/2” larger than the height and width of the window’s frame size to allow room to shim the window in case the opening is not perfectly square. However, some manufacturers recommend a rough opening…
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Why do standard window sizes vary by manufacturer?
On the west coast, architects have a common practice of using “nominal” sizing for windows where the rough opening (the framed wall opening for the window fit into) is a standard size, such as 5’ wide by 4’ tall. Following World War II, there was a major building boom in west coast states and high…
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Can I have my windows replaced to take advantage of new energy-efficient technologies while maintaining my home’s historic appearance?
Absolutely! Many of the windows we sell keep the appearance of historic windows and have features such as: insulated glass units (some filled with inert noble gasses, such as argon), Low E coatings, tight-fitting components, and improved weather-stripping to seal out the weather. Simulated divided lites (SDLs) use applications to the exterior and interior of…
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What does it mean to have a “clad” wood window?
A wood window’s “cladding” is the material applied to the exterior of the window frame to improve its ability to resist corrosion and rot, and to provide a low maintenance exterior. Aluminum, vinyl, and fiberglass are all used as cladding, and each offers pros and cons that we are happy to discuss with you. As…
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How often do you recommend that I clean my windows?
Cleaning the glass of windows and doors is occasionally necessary for clarity and exceptional performance. When cleaning, avoid using abrasive materials that might scratch the glass. See your manufacturer’s website for specific details on cleaning methods.
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How do I care for my new windows?
We recommend that you follow the care and maintenance recommendations of your window manufacturer: Anderson windows Fleetwood windows JELD-WEN windows Marlin windows Marvin windows Milgard windows Ply Gem windows