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Open Roads Forum  >  Travel Trailers  >  General Q&A

 > Best sealant for slight roof leak?

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jaycoman89

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Posted: 02/17/21 08:07am Link  |  Quote  |  Print  |  Notify Moderator

Have gotten a lot of rain lately and noticed a slight drip coming from the roof thats roughly right below the a/c unit... hoping to get down there Saturday to try and mitigate. Any advice on sealants/how best to attack this problem?

Lwiddis

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Posted: 02/17/21 08:11am Link  |  Quote  |  Print  |  Notify Moderator

I use Heng’s roof coating and Eternabond tape depending on the situation


Winnebago 2101DS TT & 2020 Chevy Silverado 1500 LTZ Z71, 300 watt solar-parallel & MPPT, Trojan T-125s. TALL flag pole. Prefer USFS, COE, BLM, NPS, TVA, state & county camps. Bicyclist! 14 year Army vet-11B40 then 11A - (MOS 1542 & 1560) IOBC & IOAC grad


GrandpaKip

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Posted: 02/17/21 08:21am Link  |  Quote  |  Print  |  Notify Moderator

First, check the a/c gasket by taking off the inside ceiling cover.
Self leveling caulk made for RV roofs should be used for roof maintenance.


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BarneyS

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Posted: 02/17/21 08:21am Link  |  Quote  |  Print  |  Notify Moderator

Probably just need to go inside, remove the AC ceiling cover, look up into the AC and find the 4 long bolts in the corners, and tighten them up a bit. It is quite common for the gasket that seals the AC opening to compress over time and start to leak. The cure, other than replacing the gasket which means removing the AC from the roof opening, is to tighten the bolts a bit.
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jaycoman89

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Posted: 02/17/21 08:41am Link  |  Quote  |  Print  |  Notify Moderator

GrandpaKip wrote:

First, check the a/c gasket by taking off the inside ceiling cover.
Self leveling caulk made for RV roofs should be used for roof maintenance.


Thanks!

jaycoman89

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Posted: 02/17/21 08:42am Link  |  Quote  |  Print  |  Notify Moderator

BarneyS wrote:

Probably just need to go inside, remove the AC ceiling cover, look up into the AC and find the 4 long bolts in the corners, and tighten them up a bit. It is quite common for the gasket that seals the AC opening to compress over time and start to leak. The cure, other than replacing the gasket which means removing the AC from the roof opening, is to tighten the bolts a bit.
Barney


Thanks, I'll see about getting down there this weekend and doing that. Anything I need to watch out for when removing the panel? Also, the a/c unit hasn't been running or anything for months. Not sure if that makes a difference in your diagnosis or not.

MFL

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Posted: 02/17/21 08:54am Link  |  Quote  |  Print  |  Notify Moderator

Non use should not matter. Barney is likely correct, but word of caution...snug up the 4 bolts, rather than tighten. A little tighter is all that should be needed.

Jerry





jaycoman89

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Posted: 02/17/21 09:00am Link  |  Quote  |  Print  |  Notify Moderator

MFL wrote:

Non use should not matter. Barney is likely correct, but word of caution...snug up the 4 bolts, rather than tighten. A little tighter is all that should be needed.

Jerry


Stupid question time... is removing the ceiling panel a matter of popping it out and back in or is there a lot more to it? I want to say the cabinets and everything were installed after the ceiling panel, so I'm ttrying to work out in my head what exactly "removing the panel" would entail.

kellem

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Posted: 02/17/21 09:20am Link  |  Quote  |  Print  |  Notify Moderator

You remove the AC panel from inside trailer to access the (4) long bolts, a quarter turn on each bolt should do it.

BarneyS

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Posted: 02/17/21 09:40am Link  |  Quote  |  Print  |  Notify Moderator

Sorry for the confusion. By ceiling panel, as explained above, I meant the cover over the AC on the ceiling of the RV and where the filter is located. It may require removing several screws which are now covered by a removable plastic or rubber plug cover. Just take a small screwdriver and work it under the edge of the cover and it will pop off.

The whole ceiling panel is made of plastic so it is light and should come right down after removing those screws. Then you need to use a flashlight and look up inside the opening of the AC if those four corner bolts are not immediately visible. Some AC's have them right under the cover and others have them up inside the AC, but all have them easily available to snug up.

That is how the AC is held on to the roof. The whole thing is a sandwich with the upper unit on the outside and the lower unit inside with the roof and gasket in between. Then the inside opening is covered up with the ceiling panel.[emoticon]
Barney

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