Community Forums

mmcl26554 · 09-14-2012, 10:19 AM

The roof of my 1992 Holiday Rambler Imperial 33 foot motor home, although not leaking, is chalking a lot. I want to put something on it and Kool Seal White Elastomeric Roof Coating seems a good choice. Also there is a lot of what appears to be a “self leveling” calk around things mounted to the rood. Such as Vents, A/C, Satellite antenna and over the air antenna. Some of the edges of this caulk is pealing up and all of it is “alligator skinned”. Would the Kool Seal White Acrylic Patching Cement, be good to use over this caulk. My plan would be to power wash the roof to remove the chalk, fix the present caulk and coat the whole thing with the Elastomeric Roof Coating. Does this sound like a good plan or does anyone have a better one?
Michael

topdownman · 09-14-2012, 01:53 PM

I'm aghast that your HR Imperial has a rubber roof. I've owned HRs before and they almost exclusively have one-piece aluminum roofs. Are you sure yours hasn't been coated with something?

mmcl26554 · 09-14-2012, 03:09 PM

Relax Mark, I just neglected to say it was aluminum and not EPDM! I just finished the power washing and scrubbing, using a soft brush and Dawn and it really looks great. Now I think the only thing I need to do is refresh the caulking around the roof mounted objects. Maybe with Eternabond RV Tape? The tape installed by the factory over the seam down the middle and the end caps looks to be a tape with an aluminum backing. On several spots the paint is warn off and you can see the aluminum backing. There are no cracks and it looks to be intact, but I think I should paint over it or put a layer of Eternabond RV Tape over it. Suggestions?
Michael

mel s · 09-14-2012, 07:00 PM

IMO Eternabond tape is the right thing to use over any seam, after scraping off the old caulk and wiping with solvent.
Dicor self leveling caulk for any recaulk requirements, after a good wash/scrub/ rinse with a TSP/water solution.
Then 2 coats of white Elastomericroof coating.
Here is a link photos of Steveio and Karen redoing the fiber glass roof of their '96 Safari Serengeti few years ago:
http://groups.yahoo.com/group/Safari...34214/pic/list
(you must sign in to Yahoo to access that info)

No Yahoo account? email "KarenInTheWoods Karen Pfundtner" <pfundt@gmail.com>, and ask for roof coating info, (tell her Mel sent you)!
BTW, S&K did my roof just three weeks ago!
Mel
'96 Sahara
.

Gary RVRoamer · 09-16-2012, 10:13 AM

I'm an Eternabond fan, but still don't think it is the right answer to everything on the roof. Many roof openings lend themselves much better to a caulk than a tape, e.g. ladder mounts, tank vent pipes, antennas, etc.

Any loose caulk should be removed. So should any dried out caulk - press it with a knife blade or screwdriver to see if it is still flexible. If not, scrape it off and re-caulk or use tape if the surface is suitable.

Rough/cracked in the surface is not necessarily a problem, but needs to have a closer look.

Since you have a metal roof, the Koolseal patching cement should work fine. Would not use it on EPDM, though.Kool Seal makes special, EPDM compatible products for that.