We have composite shingles and I’m assuming there are underlayment and decking underneath. I think the planks were just the chosen ceiling material. That said, all I can see with my own two eyes at this point are the shingles and the ceiling side of the planks. This roof was put on by flippers in 2010, and we’ve seen their handiwork elsewhere in the house. Not the *worst*, but not the best.
I’m concerned about the condition of the things we can’t see — the decking and the underlayment, which we know have been breached. The first leak was in September and small. Since then there has been a ton more rain, several more leaking spots in an area about 12×6 feet, and not much chance for drying out.
I’m worried about continued moisture contributing to mold and general weakness/decay, as well as termites. I don’t have a sense of how fast the moisture can start undermining the materials and to what degree — are they designed to be sturdy enough to get though a whole season of being consistently wet/damp?