Our 15/16” decking is kiln dried and 5” wide. This product is typically used on timber frame carports, outdoor kitchens, and porches, and timber frame multiple story homes. This product eliminates the need for plywood decking. The back side of this decking is smooth. Applying this product on the timber frame structures as the ceiling provides a tongue and groove look from the bottom and a nice smooth top to nail shingles or to screw tin.