Forum Discussion

Dave_Spurgeon's avatar
Dave_Spurgeon
Explorer
Mar 29, 2013

fiberglass roof leak

I have a '98 Winnebago Brave with what I assume to be a fiberglass roof. I seem to be accumulating moisture in the left rear corner and in the right side cabinet just in front of the door.

I am looking for advice as to how to seal these leaks and maintain my 15 year old roof. I looked at the EPDM rubber coating website, but I can't see pulling my AC units to follow their instructions perfectly.

Any suggestions as to what product to use or what procedure to take would be appreciated.
Class A
  • imgoin4it's avatar
    imgoin4it
    Explorer
    Mar 30, 2013
    If you have clearance lights above the area where you experience water I would check them over very close. I had leaks in the front clearance lights on a journey.
  • wny_pat1's avatar
    wny_pat1
    Explorer
    Mar 30, 2013
    Dave Spurgeon wrote:
    I seem to be accumulating moisture in the left rear corner and in the right side cabinet just in front of the door.
    Check the front awning hardware. For the rear left corner, it could be traveling back from the air conditioner.

    And you don't want to put on a rubber roof!!! Wash and wax it. You may have to seal up some seams.
  • wny_pat1's avatar
    wny_pat1
    Explorer
    Mar 30, 2013
    wny_pat wrote:
    Dave Spurgeon wrote:
    I seem to be accumulating moisture in the left rear corner and in the right side cabinet just in front of the door.
    Check the front awning hardware. For the rear left corner, it could be traveling back from the air conditioner.

    Yes, it is a fiberglass roof. And you don't want to put on a rubber roof!!! Wash (Spic&Span) and wax it. You may have to seal up some seams.
  • Beverley_Ken's avatar
    Beverley_Ken
    Explorer
    Mar 30, 2013
    Check the seams at the side where the roof fibreglass panel goes into the extrusion on top of the wall. The adhesive (poly urethane adhesive/sealant will start to separate or crack. If it becomes too bad, the roof panel has has been known to pop out.
    It's best to clean out the old adhesive before redoing the seams.

    Beverley & Ken
  • webhannet's avatar
    webhannet
    Explorer
    Mar 30, 2013
    Another thing to consider is errosion or faults in the fiberglass itself. I experienced tiny holes in the fiberglass in a single area - no idea why. The cure was to FIND the tiny holes and re-gelcoat the area.
  • theoldman's avatar
    theoldman
    Explorer
    Mar 30, 2013
    side where the roof fibreglass panel goes into the extrusion on top of the wall.
    this is what happen to us this winter.. where the roof and the sides meet, there is a strip that also acts as a gutter. If you look down on it , you might see that it needs cleaned out and new seal put in . I redid the whole side of mine cleaning out all the old and useing the selfsceling culk . and that fixed it.
  • RayChez's avatar
    RayChez
    Explorer
    Mar 31, 2013
    Just buy a couple of rolls of Eternabond four inches wide and apply it on all the seams. You will never have a water leak again.
  • ncrowley's avatar
    ncrowley
    Explorer II
    Mar 31, 2013
    I second using the Externabond tape. I had a small issue where there is a seam in the Fiberglass roof. Eternabond did the trick.

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