Joints shall be level and smooth. C. Thickness of plywood and spans shall meet the following minimums except where local building codes require greater thickness. When drainage is to the edge of the deck, a metal drip edge is recommended to avoid water running down the fascia. Gacoflex coating cannot be used to provide slope that is a function of the structural design. Lack of adequate slope may lead to leaks at thresholds, puddles and surface staining for which the coating applicator does not assume responsibility.
Good design requires that adequate ventilation be provided for all enclosed space.
Insulation shall have a vapor barrier installed on the warm side of the insulation. Ventilation the full length of the soffits will help reduce sound transmission. Plywood and insulation board joints shall not coincide. Use non-rusting screws with countersunk heads, hot dipped galvanized nails, or deformed shank nails only. Drive nails flush without indenting the plywood.