What will happen if it rains during my roof installation job? Because we can complete most residential roofing jobs in just one day, rain won't be a problem. If rain is in the forecast, we will protect you by delaying your job until the weather is optimal. If by some chance, we get "caught" by an unexpected rain, we are equipped to take all necessary precautions to protect your home by "tarping" the roof until the weather allows us to continue. This is very rare.