Is It Ok If Roof Felt Gets Wet

That s why planning is so important during a roof installation.

Is it ok if roof felt gets wet.

During clear 70 degree days we have more flexibility in our schedule. The felt can be damaged if exposed to moisture too long. This shortens the effective life of the shingles and can adversely affect the roof sheathing. But not for long periods of time.

Felt will often get wet with a cedar shake roof since this type of roof is designed to soak up then shed water. Doesn t matter at all. 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.

Waterproof roofing felt gives the roof temporary protection from rain while you apply shingles tiles or other roof coverings. The felt collects and then repels the water allowing the roof to breathe. Certainly it would have been better to have covered the roof with a tarp or roofing felt before it rained. I ve tried covering the roof to protect from rain with plastic or.

Any moisture trapped in the roof will flow down and out. The bubbled felt can cause a minor lump on the finished roof depending on what sort of roofing you re using. So yes roofing underlayment can get wet. 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.

Roof replacement is expensive. When the felt gets wet it will crinkle up and not lay flat which may not be noticed if you have a thick comp shingle 30 year. Roofing felt is not designed as a permanent exterior barrier against water. Osb like all other wood will expand when exposed to moisture and i assume the contractor spaced the panels the required 1 8 along the 4 edges and installed h clips along the 8.

Roofing felt should ideally be dry when shingles are installed to avoid ripping but it s still possible to install when wet. It is safe to walk on.