This free standing wood deck is made of pressure treated pine and it has a pergola built into the rails of the end of the deck. The rails on this deck are lifestyle rails with black round aluminum pickets. There is no skirting on this deck which keeps it open underneath. The pergola is free standing on the rail of the deck and it has no lathing. The pattern of the boards on this deck is a diagonal pattern which we use to enforce a safe and sturdy top. This deck & pergola were built & designed by Glen Ellyn, IL designer Archadeck of Chicagoland.