Roofing Over Wet Felt Paper

Is it ok to shingle over wet felt.

Roofing over wet felt paper.

Roofing felt or tar paper can be left out in the weather for weeks shedding rain water while the roof is in progress of being completed. 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. Bitumen or asphalt is distilled from petroleum and is what makes roofing felt waterproof. The felt as you know is designed as a last stand against water intrusion on to the roof sheathing and into the home.

Traditional roofing felt also called tar paper or underlayment is felt saturated with bitumen also called asphalt. The felt is actually what keeps your roof dry. 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. Roofing felt is made of compressed polyester or fiberglass fibers.

A protective water repellent coating such as asphalt is then applied. 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. The felt can get wet. 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.

Roofing felt applied over a wet roof deck or shingles applied over wet roofing felt traps a layer of moisture within the roof. The shingles are in place to protect the felt. How bad is it to shingle over wet tar paper. 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.

Felt is compressed fibers of wool. This moisture can lead to mold and mildew forming underneath the shingles. Materials used in roofing felt. When roof felt gets wet.

Roof replacement is expensive. The base is made from either natural materials such as wood cellulose or synthetic materials such as polyester.