Forum Discussion

phishheadmi's avatar
phishheadmi
Explorer II
Jun 06, 2012

EPDM roof lifting

I have a question about the epdm roof on my 2001 Shasta Phoenix TT.

I purchased the TT about a year ago and one of the concerns I had was that the rubber roof was quite wrinkled and didn't seem taught. I didn't find any water damage inside, the rest of the TT was in great shape and the price was right, so I bought it.

All of the TT's in my price range were in that 10ish year old era, so I planned on any TT I bought to Eterna Bond all the seams and coat the whole thing with liquid rubber. A couple of weeks after my purchase, I found some water in a closet at the very front of the TT. I narrowed down the leak to one possible spot, where the rubber roof meets the aluminum siding at the front of the TT. I cleaned and sealed that seam with eternabond, tore apart the closet, dried everything out and repaired/rebuilt everything. I've not had any other leaks (and I've really been searching) and I've been resealing openings, etc with the eternabond. So far so good.

On our last trip though, I was able to see the rubber roof at the front of the TT actually lifting off the unit as I was driving. It's still completely connected, and we've been through a couple strong rainstorms with no problems, but I'm afraid it's only a matter of time.

It seems to me that the membrane is still intact and in good shape, it's just the glue that's failed. The roof is "wrinkled" enough though that I don't think using the rubber roof is a viable option. Is there any way I can better glue down the existing roof just so it doesn't "blow away" as I'm driving down the road? I feel like if I could do something along those lines that would at least get me through the summer, I could do something more permanent perhaps through next winter.

Anyone else run into this problem or have any suggestions?

Thanks,
Matt
  • If it were me.. I would try to make what you have last as long as you can.. I.E.. I would undo the awning and any gutters on the side and the end caps, and re glue the EPDM rubber. If its flapping in the wind and it has no tears.. just re glue and then stretch it on the side re-tighten the awning and gutters...but do it before the decking gets messed up otherwise you will have more troubles...
  • You can mechanically fasten EPDM. This video is for buildings but, the same principle. You may be able to do it with a dozen or less fasteners, and without the insulation board of course.

    click
  • Thanks for the advice guys. mph medic, I'm definitely with you on trying to make the existing roof last as long as possible. I've not yet removed the gutters to see what's going on at the edges, but it seems that the loosest spots are towards the center. I don't think it's a situation where I can say lift up the front third of the epdm, glue and replace...I think I'm dealing more with several large "spots" that are coming loose. I don't know if there's anything like this out there, but what I had in mind was injecting some glue under the membrane with a syringe or something, then repairing the hole(s) with eternabond.

    sharker, I think that mechanically fastening my loose spots might just be the way to go. Of course I'm always nervous about putting MORE holes in the roof, but I could put a large eternabond patch over each fastener and probably be ok. Maybe I can come up with some way to do a combination of mechanical fasteners and injected glue.

    Thanks for the quick responses!
  • Mine does this same thing. I'm waiting for the day it rips off.
  • If it is ballooning as you say it is I think it will need glued back down…
    The problem is you may not know why it has come lose until you open it up… bad adhesive or maybe water soaked wood…

    Doing nothing will assure it will get worse…

    Are you absolutely sure it is EPDM and not TPO???
  • Vent the RV so the air can not build up pressure when moving. See if you find where the air is innering the nose.
  • LOL, it's been almost a year to the day that I posted this, how funny.

    I doubt anyone's still paying attention, but I just thought I'd throw out an update.

    I haven't done anything further with the roof, I've been keeping a very close eye on things and can't see any additional problems or areas of concern...the membrane still balloons up a bit at highway speeds, but we've been through some helle rainstorms lately and still no evidence of leaks I can find anywhere. At this point, I'm just going to maintain the status quo and hope to get another year or two out of the roof. Once I detect the slightest hint of water penetration, I'm tearing off the whole roof and having it done with the Rhino Eco Liner...seems to be the best option. Anyone done this roof before?