Multicolor fiberglass doors. Fiberglass doors are superior insulators and are suited for many climates — hot or cold, wet or dry. Unlike steel doors in wet climates, they are not susceptible to rust. Unlike steel, fiberglass does not transfer heat, which makes it a better choice for areas with greater seasonal fluctuations in temperature.
Doors made of colored fiberglass. In both hot and cold areas, as well as rainy and dry ones, fiberglass doors perform admirably as insulators. They won’t rust like steel doors do in humid areas. When compared to steel, fiberglass is preferable in regions with wide temperature swings due to the material’s inability to conduct heat.