Hi all,

Many of you gave me some good tech advice on an issue I am having re: a leak in a vent pipe on my roof. I finally went up there; I had remembered that the pipe was “recessed” (that was the drain pipe, duh….). The pic posted is the vent pipe. My idea of putting a “hat” on it was good, but it already has a hat.

So, my issue is more unclear. Why the hell is there slight leakage into two top floors???

I looked at the pipe and can’t find any cracks on the outside….

What to do???


What's Your Take? Leave a Comment

  1. Patching a roof is indeed trial and error. It’s helpful was to go around the roofe enough after it rains so there is very little residual water. Then go carefully over the area around the vent and sklight and see if you can find any spongey or oozy spots. I found this expecially effective where patching had previously been done with a goopy black all weather product. It looks like there’s already been a lot of patching on the vent, but you should carefully check where vertical and horizontal meet.

  2. What they said. Oftentimes the crack is hard to find and it may be a distance from where it seems to be entering from below,

  3. look for cracks in the roof membrane around the pipe. Roof is pitched so water will run down to the back of the roof. Pipe would make a dumb on the way of the water and if there is a crack around the pipe base, significant amount of water from the roof would leak bellow.

  4. Hard to be sure, but it may not be the pipe. That’s the really frustrating thing with water, it travels. Is that a skylight beside the pipe? The initial leak could be there and the water migrates over to the pipe and slides down that. It could be that you have a hairline crack that you really have to look to see, it doesn’t take much. Really look at the flashing around the pipe and seal anything that remotely looks like it might be an opening. Unfortunately, sometimes with leaks you have to start with what seems the most logical source of water and fix one thing at a time until you get lucky.

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