Window Glossary

Window Glossary

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There are 2 names in this directory beginning with the letter V.
Visible Light
The portion of the electromagnetic spectrum that produces light that can be seen. Wavelengths range from 380 to 720 nanometers.

Visible transmittance (VT)
The percentage or fraction of the visible spectrum (380 to 720 nanometers) weighted by the sensitivity of the eye that is transmitted through the glazing.

TESTIMONIALS

Editha S. of Potomac, Montgomery County, MD 20854

(Found on CheckBook.org)

Apart from the quality work, Edgar Li puts no pressure on his clients, unlike many other firms who insist you sign on the dotted line immediately in return for some minute discount from a much higher price. Installation of a replacement for the front door went equally flawless, and we saved several thousand dollars. It’s a joy to work with Crystal Exteriors.”

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