Gaps In Plywood Roof

Plywood used as a subfloor wall underlayment or roof sheathing needs to have the seams sealed with caulk.

Gaps in plywood roof.

Roofer ripped all wood off to rafters installed new plywood some kind of felt or base and torched down a rubber roof. In one area there is a 1 1 2 gap in the plywood where it attaches to the wood extending from my house. The minimum plywood for roofing. Virtually every one recommends that you your carpenter or builder create a 1 8 inch gap around all edges when installing plywood.

Combining sheets of plywood makes the wood project more durable. Unsealed seams diminish the effectiveness of the cooling and heating systems of a home which can adversely affect utility costs. This gap will minimize or totally eliminate any puckering caused by swelling. Roofer says it is acceptable and the local building inspector.

Voids in plywood are simply large holes that occur naturally in the surface of the wood. Rafters run from the peak of the roof. By sealing these seams moisture insects dust and air can t permeate into a home. Use a 16d sinker nail for this purpose.

Will the rubber sag over time in this gap. If the flatness of sheathing or flooring panels is acceptable apa would generally recommend that any finish flooring siding or roofing be installed as planned regardless of whether gaps are present. Plywood manufacturers are aware of these problems. Gaps that were initially present may have closed due to normal moisture related expansion.

While it s best to fill any voids prior to attaching pieces of plywood together you can fill voids between plywood sheets with wood filler.