Roof Plywood Rot

Once you repair the hole in the roof plywood you need to seal up the seams and recover the roof.

Roof plywood rot.

Note bad areas for removal. Although the plywood typically lasts longer than most shingles and roof coverings leaks can cause them to rot. One of the nice things about plywood is the variety of options you can buy. Look up at the roof area.

In most instances it is plywood or particleboard. Cover the seams between the old and new decking with bitumen tape. All roofs have a layer of plywood sheathing underneath them which provides a base for the shingle attachment. 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.

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. 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. Most roof decking is made from plywood or a plywood composite known as oriented strand board osb. Moisture causes wood to rot and rotten wood absorbs water even more readily than fresh wood.

Once all nails and screws are removed lift the rotted decking board up and off the roof. Osb is composed of intertwining wood strands bonded together by a. Plywood is made with an odd number of layers for optimal strength and performance. Lay felt paper onto the roof overlapping the existing paper to get good coverage.

Your new board should be the same material. Rotted plywood is identifiable by sinking areas of the roof or visible leaks. Rotted plywood can cause a number of issues. 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. Locate the rotted roof decking. Gain access to the attic to inspect the plywood or roof decking.