Roof Plywood Rot

Osb is composed of intertwining wood strands bonded together by a.

Roof plywood rot. Once all nails and screws are removed lift the rotted decking board up and off the roof. Locate the rotted roof decking. And if a home s roof decking is rotting and unable to support the weight of the roof it can cause some very serious structural issues. Cover the seams between the old and new decking with bitumen tape.

Gain access to the attic to inspect the plywood or roof decking. Prime spots in the attic for wood rot are on the underside of the roof decking in the joints where the wood members connect at the peak of the roof and at the edges of the attic where the. Moisture causes wood to rot and rotten wood absorbs water even more readily than fresh wood. Look up at the roof area.

One of the nice things about plywood is the variety of options you can buy. What are different types of roof decking. Once you repair the hole in the roof plywood you need to seal up the seams and recover the roof. Note bad areas for removal.

Although the plywood typically lasts longer than most shingles and roof coverings leaks can cause them to rot. Staple it to the roof decking or nail it with plastic capped roofing nails. All roofs have a layer of plywood sheathing underneath them which provides a base for the shingle attachment. Rotted plywood can cause a number of issues.

Up until 2000 plywood held the majority of the market for wall roof and floor sheathing when it was surpassed by osb which as of 2018 held about 75 of the market share. Lay felt paper onto the roof overlapping the existing paper to get good coverage. Rotted plywood cannot support the weight of a roof the way healthy wood can nor can it safely grip the nails put into the roof and keep them held firm. 2 why is rotted plywood decking an issue.

In most instances it is plywood or particleboard. Most roof decking is made from plywood or a plywood composite known as oriented strand board osb. Your new board should be the same material.