Have been investigating leak on my 3 season room. Not certain it is related to this finding but discovered flashing around my chimney in an interesting state.
Big gap in corner and also the epoxy/sealant that the flashing was pushed against at the top of the flashing was not sealed/tight anymore (suspect water was getting under/behind it) – I caulked this up. Peeking inside of this gap I can see a varied state of wood.
- Should I install some sort of kickout flashing?
- Can/Should I gap fill this with caulk/foam – we had yellow jackets in
the wall on another side of the house we disposed of so I know
they'll be looking for a new home this year.
Apologize that the last few images are bad, they're from a 3rd party app to use the cheap amazon boroscope.
Inside the gap
Best Answer
You should caulk this with the best exterior caulk you can buy (doesn't have to be roofing, but do NOT use latex caulk for this). Don't use expanding foam, as it's not waterproof.
You might want to double check and make sure there's no lasting water damage (i.e. wood rot) before you do.