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Old 03-23-2012, 12:24 PM   #1
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seals leaking rain onto inside ceiling.

We live in a 98 Newmar Mt. Aire and it's hitting that "breakdown" point where a lot of little stuff is going wrong. During a recent heavy storm I noticed that a water stain began appearing around one of my ceiling speaker installations. Since it's not far from
the Fantastic, I suspected the seal was breaking down on the latter. I removed the speaker, took out a bunch of wet insulation and left some
paper towels while I continued to diagnose the problems. Then another stain began to appear around the rear fluorescent light. Since this is
right under the rear Duo-therm (low profile), my suspicions went to the
duotherm seal. Is there a gasket under the duotherm unit? Or does it go in and get sealed with regular sealant (which is?). Any info/ideas? I need
to nip this in the bud before we get into real trouble. Sounds like
my major roof units need to be cleaned and re-sealed.


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Old 03-23-2012, 12:28 PM   #2
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you can go to any RV dealer and pick up a tube of sealant. You can also go to any home store and pick up Permaseal from the paint dept. Personally, I prefer the permaseal.

14 years is a fairly long time for roof sealant unless it has been redone in the past. I just went over mine last summer. Go over every inch of sealant, clean out the old dried up stuff and redo it.

John, Joyce & Zoie the Terrier. - Fulltime since 2008

2017 Solitude 375-RES by Grand Design
2018 Ford F-450 King Ranch
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Old 03-23-2012, 12:45 PM   #3
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Hi, Your a/c does use a gasket under it. There are 4 nuts to tighten from inside. Do not over tighten. remove the filter to see two of them and I believe two are under a couple plugs.

2004 Monaco Monarch
Blueox, SMI, 1990 Wrangler YJ
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