The fire-rated fiberglass doors meet most national and local code ... ODL also produces uPVC Keystone-brand impact-rated frames. With a contemporary flat profile and no visible screw plugs ...

Fiberglass and steel doors are manufactured similarly. A wood perimeter frame is sandwiched between two thin skins of either fiberglass or steel. The void in the wood frame may be filled with ...

Unlike the classic solid wood door, both steel and fiberglass doors are constructed in layers. Both of them typically start with a core of either wood or polyurethane insulating foam, which helps ...