Roof Plywood Rot

Generally plywood roof decking that has gotten wet and had the shingles applied over it if allowed to dry out will not be seriously damaged by wood rot fungus organisms.

Roof plywood rot.

Once all nails and screws are removed lift the rotted decking board up and off the roof. 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. One of the nice things about plywood is the variety of options you can buy. Plywood is made with an odd number of layers for optimal strength and performance.

What are different types of 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. 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. 2 why is rotted plywood decking an issue.

Lay felt paper onto the roof overlapping the existing paper to get good coverage. Once you repair the hole in the roof plywood you need to seal up the seams and recover the roof. Locate the rotted roof decking. Gain access to the attic to inspect the plywood or roof decking.

All roofs have a layer of plywood sheathing underneath them which provides a base for the shingle attachment. 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. Look up at the roof area.

Cover the seams between the old and new decking with bitumen tape. Rotted plywood is identifiable by sinking areas of the roof or visible leaks. Note bad areas for removal. Staple it to the roof decking or nail it with plastic capped roofing nails.

Although the plywood typically lasts longer than most shingles and roof coverings leaks can cause them to rot. Moisture causes wood to rot and rotten wood absorbs water even more readily than fresh wood. Rotted plywood can cause a number of issues.