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Old 03-04-2011, 04:50 PM   #1
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Roof Leak during heavy rain

I have been trying to figure out why water comes down into my bed as well as runs down the walls into the lower body section of my trailer. I noticed that the shroud on the A/C unit is busted and has a large piece missing. Can the rain enter the trailer through the A/C unit? Also, I can't seem to figure out where to order a new shroud from. Obviously it needs to be replaced either way.

Any wisdom is appreciated.
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Old 03-04-2011, 05:20 PM   #2
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Maybe AC pan drain clogged?
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Old 03-04-2011, 06:57 PM   #3
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I might suggest to get the trailer bubble tested to possibly dramatically shorten the time it takes to find the source of the leaks and repair them all. My trailer is older, but I thought I had one leak in front of the door and it turned out I had 11 separate leaks.
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Old 03-04-2011, 07:23 PM   #4
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Original AC unit?? Camping World has a quality aftermarket shroud for the unit. Mine was about $100 and they gave me a military discount. It's a do-it-youself project.

Look at the oven side vent - that was where my leak was. Leaks on AS can be almost anywhere. After a few years, you almost have to have every outside seal redone and inspected. Good insurance.

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Old 03-04-2011, 07:37 PM   #5
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The airconditioner is most likely a Dometic Penguin. Shroud is commonly available. I got mine at camping world but google it. I see it on Amazon.

It would certainly be a good idea to replace it, perhaps it could solve the leakage.

Check the rear cabin vent, the bathroom exhaust fan, the sewer vent cap. If it were mine, I'd take a good look around on the roof.
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Old 03-04-2011, 07:48 PM   #6
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andyfuson -- is your bed a rear sideways queen? Or a rear corner?

I know that our front-bed had leaks over the front windows due to the afterthought about how the factory attached the rockguard (it was due to incomplete caulking ... easily repaired in my driveway).

After the first handful of years I feel that I'd benefit from leak testing if I have any questions. Search the forums on Sealtech.

A deteriorating AC shroud would not cause interior leaks IMO...
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Old 03-05-2011, 03:18 PM   #7
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Thanks, It is a rear corner bed. I had put a sealant tape product (tar with silver backing) around the roof vents last summer. I have never tried to put anything on any of the seams though. It sounds like that may be something that I need to do. I was wondering about all of the rivets as well. Not sure if I should coat them as well. I hate to do anything that is not attractractive. I thought about painting the roof with a sealer type product, but I wasn't sure if that would look tacky.
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Old 03-06-2011, 03:29 PM   #8
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Interesting

I'm in the metro Atlanta area, which received 2-3 inches of rain (generally steady or light) over the last day and a half. I went into the camper today, and I didn't see any signs of water inside.

This brings me back to my original idea. Is it possible, or likely, that with the A/C shroud badly broken and having a large hole in it, would light rain simply fall into the A/C pan and drain down the hose in comparison to a heavy rain that overflows the pan. In the case of water overflowing the pan, would it then enter the trailer?, or should it still not be able to get inside.

The unit is the original Dometic Penguin Duotherm, so I will begin looking online to get it ordered and replaced right away.
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Old 03-06-2011, 03:33 PM   #9
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Quote:
Originally Posted by andyfuson View Post
I'm in the metro Atlanta area, which received 2-3 inches of rain (generally steady or light) over the last day and a half. I went into the camper today, and I didn't see any signs of water inside.

This brings me back to my original idea. Is it possible, or likely, that with the A/C shroud badly broken and having a large hole in it, would light rain simply fall into the A/C pan and drain down the hose in comparison to a heavy rain that overflows the pan. In the case of water overflowing the pan, would it then enter the trailer?, or should it still not be able to get inside.

The unit is the original Dometic Penguin Duotherm, so I will begin looking online to get it ordered and replaced right away.
Water can travel once it's in the ceiling.

Check the sewer vent pipe cover gaskets. They only last 2 to 3 years, or so.

Andy
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Old 03-06-2011, 03:55 PM   #10
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Water can travel once it's in the ceiling.

Check the sewer vent pipe cover gaskets. They only last 2 to 3 years, or so.

Andy

Thanks Andy, I ordered the new cover from Camping World, and I will look at the vent pipe when I go up there to change the shroud.
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Old 03-06-2011, 05:06 PM   #11
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Seems like I read a forum post here or elsewhere recently about a leak cured by replacing the shroud. I recently had the top off mine, wish I had taken a picture. I doubt the pan is the source of the leak, but it could be from the sheet metal superstructure housing the fan, ductwork, and serving as blower motor attachment point. I'm not so sure all that is hermetically sealed.

Also check the little vent and fan in the bathroom.
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Old 03-21-2011, 01:26 PM   #12
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Question: When I scrape and clean the seams, what is a good product to clean and prep the surfaces. Mineral spirits? Windex? I don't want to aggravate the lacquer surface.

Where are you parked Andy? I am in Stone Mountain also, Stone Mountain Heights RV park. I am busy fixing my leaks to day and tomorrow.

John.
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Old 03-21-2011, 01:33 PM   #13
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This part got lost from the original post:

I have the same problem and I am working on the problem now. I flipped the AC unit over (Dometic Brisk Air) and it seems that I have to improve the blocks between the inner and outer skins. This should improve the compression on the AC seal. I am alos going to scrape and caulk all joints in the area. Using Vulkem 116.

Question: When I scrape and clean the seams, what is a good product to clean and prep the surfaces. Mineral spirits? Windex? I don't want to aggravate the lacquer surface.

Where are you parked Andy? I am in Stone Mountain also, Stone Mountain Heights RV park. I am busy fixing my leaks to day and tomorrow.

John.
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