ENTRY DOORS The Learning Center A fiberglass door isn't entirely fiberglass. The durable surface of compression-molded fiberglass covers a framework of wooden or composite stiles and rails, including wood or composite edges. The framework's voids are filled with CFC-free polyurethane foam insulation. When fiberglass first appeared in the market, it looked and felt like plastic, the wood-grain an obvious cheap rendition of the real thing.  While some fiberglass doors are still distinguishable from wood, many are virtually identical in feel and appearance. Like most products, there is a range of prices for fiberglass doors, though the price differences are based mostly on aesthetics. Performance between these doors varies. Quality is huge in fiberglass doors (much like wood doors). Stay away from the cheap brands if possible. Cheap fiberglass may crack (especially in cold weather) and fall apart. Their finishes may deteriorate quickly and the inner cores could rot. If you're looking for a cheap door, consider an inexpensive steel one first. A very important thing to note in fiberglass doors is the quality of their wood grain. Better quality doors have deeper graining in combination with thicker, more detailed panels.   8. What is a fiberglass entry door? < back to list of questions about entry doors 3245 Miracle Drive Murrysville, PA 15668 724-387-2991 PA Contractor ID PA001856