Window Glossary

Window Glossary

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There are 5 names in this directory beginning with the letter L.
Lap
To overlap the ends of two siding panels or accessory pieces to allow for expansion and contraction of the vinyl product.

Lift Handle
for raising the lower sash in a double-hung window. Also called sash lift.

Lite
A unit of glass in a window.

Low E (Emissivity) Glass
Microscopically thin, virtually invisible, metal or metallic oxide layers deposited on a window or skylight glazing surface primarily to reduce the U-factor by suppressing radiative heat flow. A typical type of low-E coating is transparent to the solar spectrum (visible light and short-wave infrared radiation) and reflective of longwave infrared radiation.

Lug/Crimp
The raised “ears” or tabs on a siding panel, created by a snaplock punch, which can be used to lock a siding panel into place when the nailing hem has been removed.

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Michelle F. of Kensington, Montgomery County, MD 20895

(Found on CheckBook.org) Mr. Li is awesome. Professional, knowledgeable, thorough. Purchased a provia front door and love it. Replaced an old original, ill-fitting and inefficient wood door. The door is great quality and is tightly sealed against airleaks. His team is also tidy, courteous and effiecient. Can't say enough great things about working with Crystal Exteriors. Mr. Li took care of all the details including follow-up to see if we were satisfied. The best!

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