Plywood rot – how is it possible with open cell?
This may be a silly question but if I have 6-8” of open cell foam against my plywood roof and let’s say that the plywood was wet when the foam was installed, but the roof is otherwise airtight to the outside (no leaks, shingles installed properly, etc)…can the wet plywood rot without air reaching it? I thought wood rot needs water, warmth, and oxygen. Would the plywood be wet but fine similar to wood from lake bottoms unexposed to oxygen?
I’m asking because I have some wet plywood from a leak, I solved the leak issue, removed the wet open cell foam, but the plywood is still a little wet. I’ll do my best to let it dry but if the open cell foam is reapplied too soon I just wanted to know if that can truly lead to wood rot.
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