Therma-Tru fiberglass doors are 5 time more energy efficient than solid wood doors (R-Value of 7.7 vs. 1.2). Most Therma-Tru doors are Energy Star rated. While some brands of fiberglass doors utilize Styrofoam, Therma-Tru fiberglass doors save more energy due to using 100% polyurethane insulation.
Fiberglass doors offer better durability and lower maintenance than either wood or steel doors. They won’t dent, rot, or rust and withstand a wide range of temperature ranges. Fiberglass doors have the authentic, high-end look for real wood and offer far more rich detail compared to steel. They have the warm feel and touch of wood.
