All panel edges should be supported on two inch lumber blocking or primary framing to insure no unsupported edges. Plywood should be continous across two or more spans with face grain across supports and long dimension perpendicular to supports. Joints should be level and smooth. The lack of proper slope leads to possible leaks at low thresholds, standing puddles and surface staining. Plywood should be glued and screwed with a heavy-duty exterior deck type screw at 6 inches on center at the edges and 8 to 12 inches on center in the field.
Plywood needs to be protected from the elements until it is coated.
It is not acceptable to leave the plywood exposed to the rain or sun. Keep plywood from being contaminated by foreign material. Front Page . Guided Tour . Product Information .