As wood absorbs water it expands.
Roofing in the rain wet wood.
Know what to look for.
Wet or rain soaked framing lumber will not rot in a matter of days.
The above article mentions that the shingles won t adhere properly if the wood or water barrier is wet when the roofing is applied.
Not only does this violate building codes but your roof just won t last if installed atop a wet base layer.
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.
Make sure your roof is completely dry before reroofing.
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.
Homeowners often worry that the wood is ruined if a house gets wet during construction.