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Grolier Encyclopedia 1993,
“PVC
(vinyl) softens and warps at 158˚ F.”
Window Review 1995
“Careful
consideration is necessary when choosing replacement windows.”
Builder Magazine, June 1998,
“Windows
and doors are the #1 source of dissatisfaction among new homeowners.”
Consumer Reports, October
1993,
“Vinyl sash tracks became distorted during durability tests. Parts of the frame
and sash bowed during durability tests. We experienced glass seal failure during
durability tests.”
Popular Science, June 1995,
“Although vinyl is more energy efficient than aluminum, vinyl, can warp and
fade.”
Reader’s digest New Do It
Yourself Manual,
“All vinyl becomes brittle in extreme cold. It expands and
softens in heat.”
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