Roofing Over Wet Felt Paper

Having wet sheathing covered with tarpaper or membrane will trap the water in the sheathing very bad practice and contrary to industry standardss for roofing.

Roofing over wet felt paper.

When roof felt gets wet. The felt can get wet. Traditional roofing felt also called tar paper or underlayment is felt saturated with bitumen also called asphalt. This tar paper is rolled on a deck like paper and serves as an underlayment layer.

The base is made from either natural materials such as wood cellulose or synthetic materials such as polyester. Sometimes called roofing felt underlayment roofing tar paper or roll roofing this is a layer of protection installed between the roof deck and the roofing shingles. Felt is compressed fibers of wool. The paper has dew in the morning so ive been wiping it down with towels or old shirts and then waiting until it dries completely.

The only problem is that the house has trees on the east side so its like 9 o clock until i can shingle and even longer until the west facing side gets sun and dries. Is it ok to shingle over wet felt. A protective water repellent coating such as asphalt is then applied. Materials used in roofing felt.

This moisture can lead to mold and mildew forming underneath the shingles. How bad is it to shingle over wet tar paper. The felt is actually what keeps your roof dry. The felt as you know is designed as a last stand against water intrusion on to the roof sheathing and into the home.

Bitumen or asphalt is distilled from petroleum and is what makes roofing felt waterproof. The shingles are in place to protect the felt. Roofing felt that has gotten wet can be covered with shingles as long as it is allowed to dry out first the surface underneath did not get wet and it did not wrinkle bubble or rip. Roofing felt applied over a wet roof deck or shingles applied over wet roofing felt traps a layer of moisture within the roof.

The decking sheathing should have been tarped and work stopped as soon as it was evident enough rain was going to fall to wet the wood or water barrier felt. Roof replacement is expensive.