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Old 09-07-2016, 05:56 AM   #1
Join Date: Mar 2012
Posts: 98
Leaking skylight over the shower

BOY, y'all have NO IDEA how much I hate putting this in here!

2012 Keystone Cougar High Country 246RL...

Last night, or actually about 2 a.m. this morning, my wife decided it would be a good idea to wake me up and tell me water was dripping in the shower... To which I said, OK, and went back to sleep 'cause
a: It was 2 AM and I'm not gonna go outside and do anything
b: It's raining like crazy, and has been for the last 6 hours AND I'M NOT GONNA GO OUTSIDE AND DO ANYTHING

Which, of course she REPEATED at 05:30 this morning just so I'd know it really was leaking. SO, I got up, and IT WAS LEAKING.
Took the inner cover off and it's dripping down the folded over rubber (EPDM?) that's in the opening. The skylight is on a slant (the roof slants toward the edge) and the leak is coming at one of the lower corners.

SO, taking it to the selling dealer is pointless - see my previous topic about the slide that didn't/doesn't work and the rear stabilizers that didn't/don't work...

I read several other discussions in other places that talked about using Eternabond tape, cleaning off some of the sealant, prepping, and sticking the tape on. I DON'T SEE any cracks, although it may be more useful to check when there's ACTUALLY DAYLIGHT.....

IF I can find a dealer SOMEWHERE here in southern MN that HAS the Eternabond tape, cleaner, and primer, I'll get it and try to fix the problem. We're, OF COURSE, in East Overshoe, a LONG way from anything resembling an RV dealer or repair place, so...

BUT, IF I CAN'T FIND ANY, is there a good reason why I can't do a little cleaning with lacquer thinner and seal it with silicone caulk?

I THINK this rain is supposed to continue through most of today, but tomorrow is supposed to be NOT raining, so I COULD hopefully get it sealed thoroughly... I"m most likely NOT going to have a lot of time to fiddle around with back-and-forth discussions in here, but hopefully I'll get some quick advice 'cause I KNOW y'all know a WHOLE lot more about what will work and what WON'T work than I do.


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Old 09-07-2016, 06:26 AM   #2
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Join Date: Mar 2011
Location: Bremerton, WA
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Don't use thinner or silicone caulking. The thinner may damage the roof and the caulking will not hold as well.

Get a tube of self-leveling dicor product. Follow the directions on the label and you should be good. Had the same issue with the vent in my kitchen. Took about 30 minutes to fix.

Good Luck

2017 Grand Design Reflection 303 RLS
1997 GMC Sierra 3500 Dually
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Old 09-07-2016, 07:50 AM   #3
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Location: outside Duluth Mn
Posts: 1,060
Mine did that a couple of years ago. The screws holding it down had stress cracks around them. I cleaned things up and looked at the problem and decided to use eternabond tape. That was probably four years ago (if not more) and it is still holding just fine.
1996 Dodge CTD auto, #100 fuel plate,advanced timing,upgraded turbo, 2006 Dutchmen 28' 5th wheel with a 12' slide out and 16' boat behind it all
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Old 09-07-2016, 08:05 AM   #4
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Join Date: Sep 2016
Posts: 113
Originally Posted by awarnes View Post
Don't use thinner or silicone caulking. The thinner may damage the roof and the caulking will not hold as well.

Get a tube of self-leveling dicor product. Follow the directions on the label and you should be good. Had the same issue with the vent in my kitchen. Took about 30 minutes to fix.

Good Luck
I'm with awarnes . I would look all over the top if you don't see any cracking around the skylite it might be coming in some where else just saying. your lucky it's in the shower.
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Old 09-07-2016, 03:00 PM   #5
Join Date: Mar 2012
Posts: 98
I got up on top and took a look this morning... Turns out at LEAST two of the screws in that corner were loose and the edge of the skylight had lifted and pulled apart slightly........

SO, I took at look around the roof at the OTHER things and all the onex I could see had cracked and peeling sealant... SO, I decided it was time to have a dealer (NOT the selling dealer) go over the roof, check everything and seal what needed it.

I'm not sure if they'll elect to take the skylight loose and reseal the whole thing under and over, but I wouldn't be surprised if there were more than just those two screws loose...

SO, to keep things sealed 'til we can take it in Monday, I picked up some ProFlex sealant, recommended by the dealer, tightened the screws and sealed the skylight so it won't leak in the torrential downpours we're expecting this week.

Thanks for the info - ESPECIALLY ON WHAT NOT TO DO!

BTW: In at LEAST two other discussions on the web they recommended using lacquer thinner on the roof to clean it and prep for sealing... Seems a little harsh to me, so I'm glad NOT to have made that mistake.
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leak, light, shower

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