Having wet sheathing covered with tarpaper or membrane will trap the water in the sheathing very bad practice and contrary to industry standardss for roofing.
Roofing in the rain wet wood.
Note that you should never shingle over bare wood like a bird s feathers shingles shed the qwater but are not watertight especially in windblown rain or melting snow conditions.
Generally plywood roof decking that has gotten wet and had the shingles applied over it if allowed to dry.
But wood rot is a slow process where the fungi start to grow and feed on the cellulose in the wood.
The wood needs to remain damp and wet all the time for wood rot to advance.
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.
The decking sheathing should have been tarped and work stopped as soon as it was evident enough rain was going to fall to wet the wood or water barrier felt.
If the felt.
Shingle roofs are installed every day over wood decking that has been wet by rain.
If the felt or liner of your roof gets wet and shingles are installed on top of it then moisture will get.
A wet installation can also cause a new roof to fail.
Wet or rain soaked framing lumber will not rot in a matter of days.
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.
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.
The above article mentions that the shingles won t adhere properly if the wood or water barrier is wet when the roofing is applied.