factory-glazed pyramid
pyramid-shaped skylights for commercial or residential use, offered in standard sizes ranging from 4'0" to 8'0", in a 7:12 roof pitch. Arrive assembled and factory glazed to the job site ready to set on a prepared curb eliminating on-site installation. Also known as the pre-glazed pyramid skylight.
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fin seal
a form of pile weatherstrip that has a plastic Mylar fin centered in the pile. This fin reduces air infiltration and ensures weatherstrip contact throughout the window's life.
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flange frame
a window frame with the head, jamb, and sill exterior perimeter leg longer than the interior perimeter leg.
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float glass
transparent glass with flat, parallel surfaces formed on the surface of a pool of molten tin. Float glass has virtually replaced sheet and plate glass because of its superior optical quality.
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folding glass wall
a folding stackable glass wall system capable of opening up to 92% of the original rough opening. Commonly used to separate rooms or to install around pool enclosures.
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