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Question DetailsAsked on 10/28/2017

Will the peel and stick roofing be dry enough to cover with shingles 2 days after a 10 hour day of rain?

Contractor tore existing roof off on Wednesday, and put peel and stick membrane on. They were supposed to come back Friday, and put shingles on. They did not. Came back Saturday morning(today) for a few hours, then it started raining. It has been raining for 10 hours now.
Will the membrane hold up, and remain waterproof for all this time.
It is not supposed to rain, for the next few days. We are assuming contractor will be back on Monday to finish job.

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1 Answer


Should be fine - most of these are rated for a month or two exposed (though of course the less exposure to the sun the better), and will normally surface dry about as fast as the street - a few sunny or breezy hours without rain.

Many contractors continue to apply shingles even with the roof water barrier damp from drizzle - maybe not best practice as it locks in wetness betweent he shingles and the membrane surface, but that is what it is there for - when ice damming or wind-blown rain or leakage through singles gets in under the shingles, so whjile not good practive if properly applied with correct top-over-bottom layer laps and end laps, should do fine.

In fact, if they started putting shingles on before the rain started, you will have water in under the courses they already put on at this time - would be best if those aired out for a rain-free day (to let the heat of the shingles evaporate the moisture underneath), but not mandatory.

I wouldnot worry - better to get the roof finished than worry about some trapped moisture, which should evaporate out through the shingles or at the ridge vent given a few dry days - especially if sunny, warm, and/or breezy.

Answered 2 years ago by LCD

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