CertainTeed Restoration Millwork cellular PVC trim is a cost-effective, low maintenance alternative to exterior wood trim. The full line of styles includes trim boards, beadboard, full-size sheets, one-piece corners, brickmould, drip cap, and specialty restoration millwork. Restoration Millwork can also be heat formed into a variety of architectural shapes. Unlike wood, the dimensions of Restoration Millwork trim are consistent from piece to piece, and it does not warp, cup, or bow. Also, Restoration Millwork trim has superior nail-holding strength, which helps prevent fasteners from popping or backing out, particularly in new home construction.