When a roof deck is exposed to water and absorbs enough to swell it should be allowed to dry out before any roofing material is applied to avoid trapping moisture under the roof material that could cause the edges to swell or buckle.
Wet roof decking during construction.
Installing shingles over wet decking also will void any warranty you might have from the shingle manufacturer.
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Water can cause problems if the lumber is allowed to stay wet for weeks and weeks so do whatever is possible to get a roof on the house.
Is it okay for a house to get wet while.
1 all the exterior walls of the house along with house wrap or some other moisture barrier 2 the roof sheathing with an appropriate water proof roof covering and 3 coverings for any openings including window or doors openings.
A dried in house includes.
Remember dried in means that the building shell has been completed.
Osb like all other wood will expand.
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Shingle roofs are installed every day over wood decking that has been wet by rain.
My builder says this is normal and i still get my 10 year warranty.
Certainly it would have been better to have covered the roof with a tarp or roofing felt before it rained.
Our osb is rated exposure 1 and that means that it will withstand normal delays in construction.
Homeowners often worry that the wood is ruined if a house gets wet during construction.
Doing so goes against the building codes in most communities and the shingles won t adhere.
The roof is partially framed and every piece of lumber and all the flat osb is soaked.
Generally plywood roof decking that has gotten wet and had the shingles applied over it if allowed to dry.