Many customers have the same concern — will moisture on the day of an install, affect the job?
The answer is it depends on the materials that are being used for deck protection.

Organic Felt Paper after a rainfall
If your roofing company uses only inorganic roof deck protection, and installs it correctly, you won’t have a problem with rippling.
There are several good inorganic deck protections on the market ranging in price. Shingle mate is a very good product that is more than sufficient for most sloped roof applications. Tigerpaw is considered a premium product, and Deck Armor is a super premium deck protection that a professional company will recommend if you have a vaulted ceiling or decking which cannot be adequately ventilated.
Of course it goes without saying that you don’t want your roof installed during a rain storm because even the best deck protection will not keep running water from getting into your house and damaging your insulation and drywall. If it starts to rain, a good crew will have tarps handy to protect your home just in case.
Use the right deck protection, properly installed by a reputable roofing contractor who is certified in ventilation practices, you will have a long lasting, properly installed roof. If you hire a company that takes the right steps, you will be able to enjoy your roof for years to come.
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Jim McGuigan is a GAF Certified Contractor working in Wisconsin.