Roof Plywood Buckling

Most underlayments have an adhesive side and a barrier side. Buckling roof plywood below asphalt shingles is a result of many things. Your roof decking is the plywood sheets that cover your home.

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Wood expands and contracts so there may not have been adequate planned spacing.

Roof plywood buckling.

Buckling can occur if the wrong type of nails were used to connect the sheathing to the rafters. The nails slip out of the sheathing and create small visible bumps on the surface of your roof. Check the buckling pattern for spacing at 4 or 8 ft intervals or a multiple of that. When these boards are not properly fastened and nailed to the framing they can.

If the adhesive side is not laid properly and not applied flat it will surely show its buckling through the roof shingles. But they must be installed correctly. They are easy to work with readily available and perform the job well. Improper installation of roof sheathing panels can result in warping or buckling of asphalt shingles.

Plywood and osb roof sheathing are the most popular roof sheathing materials in the u s. A roof over or re roof is not recommended because it will certainly lead to buckling. I agree that it looks as if the buckling is at sheathing butt joints at rafters. For a good reason.

Roofing problems can be tricky to diagnose and solve but the solution here should be pretty straightforward.

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