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Old 11-09-2011, 09:30 AM   #1
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Round Wet Spots on Ceiling


We've notice in one of our bathrooms upstairs that when it rains, there are a couple of places on the ceiling that cool and very slightly moist to the touch. These "wet spots" are round and about the size of a coffee cup in diameter. I've seen leaking roofs before but I've never seen it be so symmetrical.


Anybody have any idea what could be causing this?


Thanks!

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Old 11-09-2011, 10:07 AM   #2
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Round Wet Spots on Ceiling


Have you looked up in the attic yet?

Post some pictures of the roof above that area.

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Old 11-09-2011, 02:45 PM   #3
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Round Wet Spots on Ceiling


Not unusual at all. Sometimes a leak is a slow drip that finds its' way thru insulation and plaster/drywall. As it drips ever so slowly the water pools in a symmetrical fashion and as more drips are added to the area, the circular pattern can grow outward. Definitely sounds like a roof leak although I would check to see if there's any condensation coming from a bathroom fan.
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Old 11-10-2011, 08:39 AM   #4
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Round Wet Spots on Ceiling


Get in the attic as the other pros said. Where the leak shows itself is by no means where it might be coming from.
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Old 11-10-2011, 11:18 AM   #5
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Round Wet Spots on Ceiling


Also, consider causes other than a "roof leak", especially as the "leak" is evidencing itself in multiple locations.

Here's one I saw recently where several previous attempts to locate the source of the leak had failed.

In this case the watermarks on the ceiling were caused by condensation in a bathroom exhaust line in the attic above - the "clue" here, even before entering the attic, is the stain beside the bathroom exhaust fan housing and the linear nature of the water damage adjacent to the fan.
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Old 11-10-2011, 08:03 PM   #6
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Round Wet Spots on Ceiling


Good advice.

Drywall spots does not mean the roof is leaking by any stretch.

I have tracked back leaks that were related to central vacuum condensation as well as exhaust fan issues.

Poke you head up the attic and start from there.

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