How Long Does Plywood Last On A Roof

The topic of plywood has come up and 2 have said we definitely need to replace the plywood even if it looks good.

How long does plywood last on a roof. We apply our own water proofing thompson s or california for untreated sheathing that has lengthy exposure periods during construction but there are some expensive poducts you can buy if. The protective layer keeping your home s air ventilated and protected against moisture. It determines how long your roof will last and how well it will protect the contents of your home. This guide will explain the different uses of plywood as well as popular plywood sheet sizes and its rating and grade system so that you can choose the best plywood for your project.

Now it s bad and the plywood there is rotted. Pt goes a long time don t know the end points. The many types of plywood can differ in materials number of layers rating and grade. Most roofing jobs includes a minimum of three sheets of plywood that are part of the backbone of the roof.

Roofing felt also known as tar paper serves as both an extra layer of protection between the shingles and the plywood and as a temporary moisture barrier until all the shingles are in place. When the roofing material dries quicker it can be used to make sure that the roof will stay firm for a longer time. You can get away with more using 3 4 t g roof or subfloors. Overall plywood is a little bit better for roofing.

Choosing plywood for the roof. Chances are the shingles on your roof were attached on top of a plywood base. We did a complete tear off replacement 12 years ago and saw the first ceiling leak about 4 years ago. As plywood lasts about 30 to 40 years and we run the risk of delamination and required replacement in a few years.

Should have fixed it then and a friend did try but for a long time it wasn t too bad. Untreated plywood maybe a few rains on the 5 8. This is why plywood is considered as the better option for roofing. Even though the wood is porous it is more natural and it can dry quickly.

Exterior plywood came on the scene in 1934 with the development of a waterproof adhesive. Cdx plywood a stock item at most lumberyards is a utility grade suitable for most outdoor. How long should the plywood on our roof be good before rotting. The structural component of the roof.

Soffit the underside of the eaves. We blame ourselves for not taking care of it. Choosing the right type of plywood for the roof is one of the most important construction decisions that you will have to make. Sometimes referred to as roof sheathing or a roof deck this plywood acts as a foundation for the layers of underlay and the shingles on your roof and connects the roof to the frame of the house.

The other two have stated that as long as the plywood is good and stays dry it can last forever. Plywood is a necessity in many diy and construction projects but not every type of plywood works for every project.