This deck cover was designed by the owner who is also an architect. We built the deck and two cedar screens for him this summer and he was pleased with that so he had us back to do the deck roof as well. The wood is tight knot cedar, the bolts are stainless steel, and the roofing itself is galvanized corrugated steel. The next stage in his backyard remodel will be converting one of the windows to a door so he can walk directly out back without getting wet.