FSHV03 (Smooth)Fibreglass doors are designed to withstand the extreme weather conditions. Our most affordable door range, with the best insulation, supplied ready to paint or you could take advantage of our high quality painting service. 10 Year Warranty. Solid composite resin edges clean and tidy, which can be trimmed or rebated. LVL stiles and rails for superior stability reduces warping and bowing. Polyurethane core for high insulation. Better thermal r rating