westend wrote:
Reason why I want to coat the whole roof.... there are too many repair variables (spots) in play. It would be a lot less to worry about in the coming couple of years, if we could just coat over it again
Yes, that would be great but none of the roof coating products will guarantee against a through hole leaking. That's because coating the roof doesn't seal those areas. BTW, elastomeric roof coatings are primarily made for EPDM sheet (may be the same as your RV). Being "RV rated" is a drop in the bucket to the total EPDM market.
The exception to the "Miracle in a bucket" coating is bedliner and some shops are doing it right. Your EPDM sheet is removed and the spray on liner is applied. They guarantee it for life. It is very expensive.
I'd suggest hat you seal any through holes with Eternabond tape and then apply a coating that doesn't have any silicone. This will be the longest lasting maintenance to your roof.
westend - Yes, my roof is EPDM.
I think I'm following your directions correctly, by not trusting that the 887HS product will be "miracle in a bucket" because I'm not going to rely on it to seal holes, crevices, cracks, scrapes of the EPDM roof sheet... I'm going to do as ya'll have said to fix all that stuff first with the proper materials, then coat over the whole roof (since I already have the 887HS product and can't return it now) with the 887HS stuff. It isn't cheap either, but even at $250 for 5 gallons, its far cheaper than all the other complete redo options like new EPDM or the bedliner thing that you said...... which ultimately I'd really rather have, but the cost is just outrageously out of scope.
I really feel good about the time I've spent researching all this and talking to you guys and I feel I have a good plan, because just by following what ya'll have said alone the roof should hold water fine by itself... but I'm using the 887HS double up covering as a "CATCH ALL" ending, like a layer of clear coat on a car's paint job is a good analogy.
I will post photos and report back at some point. All of this happens within 7 days from now.
