Commercial Upgraded Exterior Wall Cladding — WPC Fluted Wall Panel This Second Generation commercial-grade WPC board is engineered for exterior building walls, feature facades and commercial waterfront projects. As part of our second-generation (CO series) range, it is produced from wood plastic composite with its upgraded four-peak concave and convex three-dimensional profile. The snap tongue-and-groove design allows glue-free quick installation, which shortens on-site