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Old 11-16-2009, 08:24 PM   #1
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strange pattern on ceiling drywall


There are some strange looking marks on the ceiling drywall in a room we rarely use. Please see attached picture. At first glance, I thought, "oh no, water damage". (It's been raining a lot lately).

However, I went to the attic and directly above the marks, there seems to be no sign of water anywhere up there above these marks.

Any thoughts?
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strange pattern on ceiling drywall-ceiling-drywall2.jpg  

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Old 11-16-2009, 08:36 PM   #2
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strange pattern on ceiling drywall


Where are you located ?
Do you know the humidity in the house ?

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Old 11-16-2009, 09:57 PM   #3
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strange pattern on ceiling drywall


Kind of looks like termite damage. I couldn't find much in the line of pictures on the net but that was my first thought.
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Old 11-16-2009, 10:07 PM   #4
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strange pattern on ceiling drywall


Dust/dirt settling on condensation due to insufficient air circulation in that room. Blow-in insulation may not be level, that area is lacking or batt has a fold there, causing a temperature difference.
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Old 11-17-2009, 02:09 AM   #5
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Maybe it's time to call the Ghost Busters?
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Old 11-17-2009, 03:08 AM   #6
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strange pattern on ceiling drywall


My first thought was pattern staining, which is the problem described by GBR. It used to be quite common here before lofts were insulated. The dust used to collect in between the joists as the timber added some thermal qualities. You could see the lines of the joists where there was no dust.
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Old 11-17-2009, 06:14 PM   #7
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strange pattern on ceiling drywall


Witch on a broom with a vapor trail?
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Old 11-18-2009, 01:59 PM   #8
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strange pattern on ceiling drywall


Ron, in answer to your location question - I'm in Atlanta. So, moisture/humidity is not out of the question. Have you seen something that looks like that?
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Old 11-18-2009, 02:15 PM   #9
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strange pattern on ceiling drywall


Looks like it may be:







- Termite tubes
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Old 11-18-2009, 04:09 PM   #10
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You and me are the only ones that think that Michael. I hope Kelly does come back and enlighten us. I am curious.
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Old 11-18-2009, 06:16 PM   #11
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strange pattern on ceiling drywall


I hope not - if termites are in that ceiling, the colony is likely *very* well established.
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Last edited by Michael Thomas; 11-18-2009 at 09:47 PM.
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Old 11-18-2009, 07:42 PM   #12
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I live in Southern California and have termites. Anyone who tells you they don't have termites in this area is lying. I've never seen them go after drywall. If they liked drywall as much as wood I wouldn't have any ceilings.
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Old 11-19-2009, 05:14 PM   #13
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It sure looks like termite damage to me. If you take a putty knife or something similar, scrape the area, and the drywall falls apart I'd say call the exterminator. I'm in Atlanta too and I've done repairs, on occasion, where they've gotten into the ceiling (usually they stick to the walls). They eat the paper on the face and back of the drywall and leave "the tunnels/tracks you're seeing. Hard to say positively, sight-unseen.......
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Old 11-19-2009, 07:07 PM   #14
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Quote:
Originally Posted by sluggermike View Post
I've never seen them go after drywall.
They go after the paper layer in the drywall.
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Old 11-19-2009, 07:31 PM   #15
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Quote:
Originally Posted by zpm View Post
They go after the paper layer in the drywall.
As I said. The paper is the closest thing to "wood" in the composition of drywall.....

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