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Author:
OL (NJ)
Hi,
My house is two story. It leaks twice recently when it rained heavily with strong wind. The leak was observed on the first floor ceiling. Roofer checked the vent boot and found no issue. We pump tape water continuously into the vent pipe at the roof for about an hour at 4-5 pm yesterday. The leak on the first floor ceiling was observed this morning at around 10 am. The leak was very slow. One drop in a few seconds. It took about 16 hours to show up the leak. It did not rain yesterday and today. When it rained heavily it took hours to see the leaks. When it rain lightly no leak was observed. THe ceiling was plaster. Could the water stay in the ceiling and leaks slowly?
Any ideas what happened? Where did the water go? How did it travel to the first floor ceiling?
Thank you!
Oscar
Edited 1 times.
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Author:
bam99 (SC)
One way or another, rain is getting into the vent because the cap us no good or the outside seal on the roof is bad. While you're figuring that out, tie an old towel around the vent pipe in your attic, just in case the water is dripping down the outside of said pipe.
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Author:
OL (NJ)
Thank you, Bam99!
Best regards,
Oscar
Edited 1 times.
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Author:
DaveMill (CA)
>We pump tape water continuously into the vent pipe at the roof for about an hour at 4-5 pm yesterday.
If you are pumping water INTO the vent, and the result is a water stain the next day, then that water stain was NOT caused by the vent seal or external flashing. You have a vent pipe leak. The most likely culprits are any joints in the pipe, or cracks in the pipe caused by brackets, fasteners, stress or age. If the water stain appears far from the vent pipe, then the water is flowing downhill along roof joists, rafters, or even the top surface of the ceiling drywall to a place where it puddles and then leaks through.
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