Fiberglass Door Finish Prevents Damage From Ultraviolet Light A recent research publication from Therma-Tru reports that engineers at the company’s Advanced Technology Center in Edgerton, OH, have developed specifically formulated fiberglass skins that solve weather-related door problems. Headquartered in Maumee, OH, Therma-Tru is a member of the National Council of the Housing Industry — the Supplier 100 of NAHB. In rigorous testing in environmental chambers, Therma-Tru exposed fiberglass materials and stains to extreme temperatures and moisture exposure and found that ultraviolet rays not only damaged coatings but also penetrated the topcoat and stain into the fiberglass material. To prevent the penetration of UV rays, light blockers were incorporated into the top coat and stain system. Together, they prohibit UV rays from breaking down the finish of Therma-Tru’s complete stain system. The manufacturer says that this system is unique to the industry and can withstand weathering over a long period of time. | 
