Roof Plywood Rotting

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

Roof plywood rotting.

We discovered damage on this roof after we removed the underlayment. I am using a 7 16 osb sheathing that i got from lowe s. If you re a homeowner looking for a new deck you need to compare plywood vs osb. Your system is likely comprised of plywood and may be rotted due to moisture and delamination caused by rain and other forms of inclement weather.

Like the fascia a decaying soffit should be soft enough to pull out manually. Rotted plywood is identifiable by sinking areas of the roof or visible leaks. Gain access to the attic to inspect the plywood or roof decking. Lay felt paper onto the roof overlapping the existing paper to get good coverage.

In most instances it is plywood or particleboard. Note bad areas for removal. Most roof decking is made from plywood or a plywood composite known as oriented strand board osb. Remove the old soffit.

The soffit is the wide horizontal board that encloses the underside of the eaves. Cover the seams between the old and new decking with bitumen tape. Your new board should be the same material. Although the plywood typically lasts longer than most shingles and roof coverings leaks can cause them to rot.

Tools reviews materials. Look up at the roof area. Once all nails and screws are removed lift the rotted decking board up and off the roof. 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.

A slight water intrusion may compromise the roof deck creating wood rot. Keep a large waste bin or similar container nearby to dispose of all the rotten roofing materials together when you re finished with your project. Roof materials plywood vs osb debate. All roofs have a layer of plywood sheathing underneath them which provides a base for the shingle attachment.

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. In this video i show how to replace rotten plywood on your roof without breaking your back. Locate the rotted roof decking.