Which way should roof sheathing be installed?
Which way should roof sheathing be installed? A: According to APA—The Engineered Wood Association, wood panel sheathing should be oriented with their strength axis or face-grain direction perpendicular to the roof framing. This provides maximum stiffness and load capacity. Does direction of plywood matter? Plywood with an odd number of plies starts with a central core ply with the grain oriented according to the total number of plies. As a point of fact, this plywood may actually be stronger across its face grain direction than with its face grain direction. And the reason has to do with the thickness of...