Roof Felt Rained On

Osb like all other wood will expand.

Roof felt rained on.

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 is comprised of a base made from natural materials such as wood cellulose or synthetic ones such as fiberglass or polyester and then coated or saturated with a protective coating such as bitumen asphalt which repels water but still allows the product to breathe. Certainly it would have been better to have covered the roof with a tarp or roofing felt before it rained. United roofing gator skin synthetic roof underlayment 42 in x 285 8 ft 1 000 sq ft synthetic roof underlayment.

Is it ok to install a new roof while it s raining i m having a new roof installed over 20 year old oriented strand board sheathing. It started raining during the install. Many of the inner components of your roof such as barriers osb boards and felt are also sensitive to water damage and should not be exposed to moisture. Installing a roof in the rain may void your warranty.

Good news is that they did a section at a time so the osb was exposed to fairly light rain drizzle for about a half hour before peel and stick membrane was installed. Normal delays and the rain you indicated will not affect the structural properties of the panels.