Rain On Partially Shingle Roof

Shingles will not stick to a wet roof.

Rain on partially shingle roof.

If it starts to rain or drizzle the roofers should act quickly to cover your osb most likely with a tarp. Shingles and roofing materials may not adhere properly to slick surfaces with high humidity. A wet installation can also cause a new roof to fail. 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 in the rain not only means you or your roofing experts will be extremely wet uncomfortable and exposed to more risk but it also means that your new roof could have less integrity than if it were installed in dry conditions. When tar paper gets wet it buckles and ripples. The osb treatment that doesn t mean that an unexpected rain or drizzle as you indicated won t occur during the roof replacement. Unfortunately the organic elements of tar paper require a perfectly dry day to lay flat.

If the sheathing or wood is wet during the time of installation it can trap moisture inside of your roof leading to mold rot or other severe problems. When shingles are placed on top of rippled tar paper voids are created which act as little greenhouses that collect heat and break down the shingle from the underside.