My bathroom fan leaks water during very heavy rains. It is on the first floor. The exhaust is also on the first floor on the side of the building, not the roof.
The fan is on the ceiling and there are no leaks during light rains.
What could be causing this? Any ideas on how to go about fixing this?
Thanks for your time! 🙂
Best Answer
I would suspect your flashing around the wall cap on the outside wall. Seal it with caulking and then see if it leaks next hard rain. There has to be a breach of some sort at the wall cap as that is the only portion of your system exposed to the elements.
When it does leak, is it just a hard rain, or one accompanied with high winds too? Could be the wind is forcing the rain into the wall cap
If it still leaks after caulking and you dont think high wind is a culprit, you could try replacing the the wall cap.