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| DIY - Forum Do It Yourself for Non-Fishing Items |
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07-13-2015, 04:20 PM
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#1
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Registered User
Join Date: Nov 2003
Location: RI
Posts: 21,231
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Roof leak
Our master bathroom has developed a leak at the vent fan which is installed in the ceiling and vents straight up through the roof. It's a vaulted ceiling with a *very* gentle pitch. Asphalt shingle roof with a pretty standard steel roof cap tied into the shingles and secured with two roofing nails in the holes at the bottom. I did it myself 10+ years ago and no issues until now.
Upon inspection I noticed one of the nails was lose and the bottom edge of the roof cap had warped up a bit. I pushed it back down and sealed the bottom edge with black sealant.
Still leaking.
Granted, the water could always be coming in from somewhere else. But would there be harm in screwing the bottom edge down (gently) with a good dose of sealant underneath, or should I think about reinstalling a new cap? Other ideas?
Last edited by spence; 07-13-2015 at 04:25 PM..
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07-13-2015, 05:24 PM
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#2
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Seldom Seen
Join Date: May 2001
Posts: 10,505
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Does it happen during rain? Or just developed? I ask because if vent hose goes through unheated space, during the winter the moist warm air condenses when it hits the cold. The vent hose could be holding that water, until the hose springs a leak..... Consider pulling the fan down to gain access so you can see more.
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07-13-2015, 05:26 PM
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#3
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Registered User
Join Date: Nov 2003
Location: RI
Posts: 21,231
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No, definitely only happens when it rains and it's recent. It's a very short vent pipe as well, perhaps 12", just enough for the elbow and out the roof…
We have three sections of very shallow roof which constantly drive me nuts.
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07-13-2015, 05:38 PM
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#4
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Seldom Seen
Join Date: May 2001
Posts: 10,505
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I would still pull the fan down. Good luck
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07-13-2015, 06:39 PM
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#5
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Registered User
Join Date: Nov 2003
Location: RI
Posts: 21,231
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Quote:
Originally Posted by nightfighter
I would still pull the fan down. Good luck
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Agree, likely there's some staining that will indicate the source...
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07-13-2015, 06:40 PM
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#6
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Registered User
Join Date: Sep 2003
Location: Libtardia
Posts: 21,591
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Make sure Dana is standing in the yard telling orders at you when you are on the roof.
Posted from my iPhone/Mobile device
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07-13-2015, 08:29 PM
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#7
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...
Join Date: Jan 2004
Location: MA/RI
Posts: 2,411
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The leak could be located between the vent collar and outer diameter of the external vent pipe.
Also look for breaks in the sheet metal seams
Posted from my iPhone/Mobile device
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07-14-2015, 05:32 AM
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#8
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Super Moderator
Join Date: Aug 2000
Location: Middleboro MA
Posts: 17,123
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it's probably a leak somewhere above or higher than the vent and once it reaches that point it follows it. Either that or rain is driving up into the vent cap
go up with a hose and have someone inside
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07-14-2015, 06:54 AM
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#9
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........
Join Date: Apr 2002
Posts: 22,805
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when peering into a dark attic space
with just a small flashlight during a rain storm
it's easier to SEE the golden "raindrips" catching the light
than having it totally illuminated...
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