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Home » Public Forums » GMCnet » [GMCnet] Roof leaks - any documentation?
[GMCnet] Roof leaks - any documentation? [message #302733] Mon, 27 June 2016 19:39 Go to next message
barbarab is currently offline  barbarab   United States
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Registered: February 2016
Location: Tucson, AZ
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Hi, just did a search on leaks and there's thousands of hits.... Where to start? What I was hoping to find is kind of a step by step on how to go about dealing with roof leaks, including taking off old sealants/caulks.

Anyone remember something along those lines?

Thanks

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Barbara Beiser Tucson 76 Glenbrook
Re: [GMCnet] Roof leaks - any documentation? [message #302735 is a reply to message #302733] Mon, 27 June 2016 20:11 Go to previous messageGo to next message
pjburt is currently offline  pjburt   United States
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This info should give you a good start. http://gmcmotorhome.info/list.html#body
In fact you might want to bookmark the site for a ton of info.


Jerry Burt Fresno, CA.
73 Gmc 26' Canyon Lands
Members: FMCA - GMCMI - GMCWS
A truly happy person is one who can enjoy the scenery on a detour.
Re: [GMCnet] Roof leaks - any documentation? [message #302736 is a reply to message #302733] Mon, 27 June 2016 20:21 Go to previous messageGo to next message
Jim Galbavy is currently offline  Jim Galbavy   
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Registered: August 2007
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Barbara,

There is not magic list, but after 40 years most sealants have dried out
and any penetration of the aluminum roof or the two plastic end are subject
to leaks. From personal experience, I can tell you that the only way to find
the leaks is to remove everything from the roof, seal all penetrations and seams
with the correct flexible materials. Check with Jim Bounds as to what to use.

jim galbavy
'73 x-CL ANNIE
Lake Mary, FL
Re: [GMCnet] Roof leaks - any documentation? [message #302749 is a reply to message #302733] Tue, 28 June 2016 09:02 Go to previous messageGo to next message
jhbridges is currently offline  jhbridges   United States
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If you take a look at Bounds' blog (Daily Pose) you can see how he does it.

--johnny


Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons. Braselton, Ga. I forgive them all, save those who hurt the dogs. They must answer to me in hell
Re: [GMCnet] Roof leaks - any documentation? [message #302750 is a reply to message #302733] Tue, 28 June 2016 09:07 Go to previous messageGo to next message
lqqkatjon is currently offline  lqqkatjon   United States
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Location: St. Cloud, MN
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here is the link:

http://www.gmccoop.com/gmc-motorhome-water-leaks-continued/


his bond and seal product is:
https://www.youtube.com/watch?v=gGbKW0l6p-k


Jon Roche 75 palm beach EBL EFI, manny headers, Micro Level, rebuilt most of coach now. St. Cloud, MN http://lqqkatjon.blogspot.com/
Re: [GMCnet] Roof leaks - any documentation? [message #302752 is a reply to message #302750] Tue, 28 June 2016 09:55 Go to previous messageGo to next message
Keith V is currently offline  Keith V   United States
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Registered: March 2008
Location: Mounds View,MN
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The big thing I'm figuring out is any crack is a water entry point.
I just sealed another leak that was a hairline crack in the ceiling vent. It barely looked like a crack, but when it rained it came right in.
I think it's capillary action that pulls the water in.

I notched the crack, filled it with 3M 5200 then I paint it with a rubberised white roof sealant / paint. I'm painting my whole roof with the stuff, cooler and sealed.

My AC covers were also cracked and it was like a waterfall, nothing worked until I fixed the cracks, then replaced the covers.

> here is the link:
>
> http://www.gmccoop.com/gmc-motorhome-water-leaks-continued/
>
>
> his bond and seal product is:
> https://www.youtube.com/watch?v=gGbKW0l6p-k
>
> --
> Jon Roche
> 75 palm beach
> St. Cloud, MN
> http://lqqkatjon.blogspot.com/
>
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Keith Vasilakes
Mounds View. MN
75 ex Royale GMC
ask me about MicroLevel
Cell, 763-732-3419
My427v8@hotmail.com
Re: [GMCnet] Roof leaks - any documentation? [message #302783 is a reply to message #302752] Tue, 28 June 2016 16:01 Go to previous messageGo to next message
barbarab is currently offline  barbarab   United States
Messages: 16
Registered: February 2016
Location: Tucson, AZ
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Junior Member
Thanks for the tips! I have someone lined up to work on the roof leaks since I don't trust myself up there and it's too damn hot anyway. It sounds like he understands what's needed although he thought he would be coming to work on a rubber roof. He usually uses Dicor poly, but he said it only comes in white. Not sure what I will do about that, since getting the whole thing repainted is not an option now. I have some of the 3M 5200 and butyl tape to try, too.

I do have a question about the mostly hated silicone. In the PPT presentation at https://docs.google.com/viewerng/viewer?url=http://gmcws.org/blog/wp-content/uploads/Caulking-and-Sealants-PPT.pdf silicone is recommended and it says it does not break down in UV light. So can anyone clarify?

And one more on this issue, and I promise I won't ask again - are the rails steel? Is that why the photos look like there's major degradation under those? And if I can't get the rails off (short of going to the Co-op), is it OK just to seal top and bottom?

thank you!!

Barbara


Barbara Beiser Tucson 76 Glenbrook
Re: [GMCnet] Roof leaks - any documentation? [message #302805 is a reply to message #302783] Wed, 29 June 2016 00:19 Go to previous message
Anonymous   United States
try 4200 at lest you can remove it unlike 5200 

From: Barbara Beiser
To: gmclist@list.gmcnet.org
Sent: Tuesday, June 28, 2016 2:01 PM
Subject: Re: [GMCnet] Roof leaks - any documentation?

Thanks for the tips! I have someone lined up to work on the roof leaks since I don't trust myself up there and it's too damn hot anyway.  It sounds
like he understands what's needed although he thought he would be coming to work on a rubber roof.  He usually uses Dicor poly, but he said it only
comes in white. Not sure what I will do about that, since getting the whole thing repainted is not an option now. I have some of the 3M 5200 and butyl
tape to try, too.

I do have a question about the mostly hated silicone. In the PPT presentation at
https://docs.google.com/viewerng/viewer?url=http://gmcws.org/blog/wp-content/uploads/Caulking-and-Sealants-PPT.pdf silicone is recommended and it says
it does not break down in UV light. So can anyone clarify?

And one more on this issue, and I promise I won't ask again - are the rails steel? Is that why the photos look like there's major degradation under
those? And if I can't get the rails off (short of going to the Co-op), is it OK just to seal top and bottom?

thank you!!

Barbara

--
Barbara Beiser
Denver
76 Glenbrook

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