Renovating the bathroom and found these dark patches in the joists and roof lumber surrounding the old vent pipe. The PVC part is new.
Anything bad here? Anything we need to address?
this post was submitted on 02 May 2024
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That's signs of a water leak. The flashing around your vent is either non-existent, or is failing.
We had the roof replaced two years ago. I believe they redid all the flashing at that point. So there's a chance this could be old? If the leak is resolved, which I'll verify, do we have to do anything to the wood or are we good?
I'd call in a separate roofer for an opinion. There are some large gaps in your sheathing where you can see the weather wrap through, and boards that have obvious signs of water damage they left in place. I would want someone else to take a look at this and confirm it's done right.