Salt air, humidity, 100° swings
Fiberglass does not warp in July humidity, does not shrink in January cold, does not rot when the south-shore salt spray hits it, and does not dent when a tool bag knocks it on the way in. It takes stain that reads as wood grain from six feet away. After 15 years, we have never had to warranty a Therma-Tru fiberglass door.
We carry the full Therma-Tru Classic-Craft (real wood-grain embossed) and Fiber-Classic (smoother mahogany or oak look) lines, plus the Smooth-Star paintable line for modern looks.
Factory-finished means warranty-backed
We strongly recommend the factory-stained finish (Therma-Tru calls it "AccuGrain + PrismaGuard"). Why: on-site stain work is weather-dependent, labor-intensive, and not covered under the manufacturer's 20-year finish warranty. Factory paint is similar — you can always repaint down the road, but the initial factory finish is bonded to the surface in ways brush-on paint cannot match.
