Patio roof cost using Alumawood 10′ x 20′ solid patio cover complete $2,200 includes 3- “H” posts, header beam, tongue & groove roof, rain gutters, downspouts, hanger, flashing with wrap kit and rafter tails. Materials only. Genuine Alumawood patio cover products by Amerimax. Complete quality with a limited lifetime warranty. Southern California residents only.