searcherrr wrote:
I have been hard pressed to find an RV approved elastomeric roof coating. Any recommendations?
What is the thin layer of wood called that is right right below the fiberglass exterior sidewalls and below the epdm roof layer? And where can i get it?
Luan.. it is a thin "plywood" so to speak, three ply 3/16" thick (they are cheating on this now days, used to be sold as 1/4" thick), has one finished side and one non finished side. Typically used for sub floor underlayment in sticks and bricks.
Can be bought at Home Depot, Lowes or most any lumber store.
Typically sold in 4x8 ft sheets, some stores may have 4x4 ft pieces precut if you don't need the full sheet.
Glue and screw down.
Typically costs $10-$12 per 4x8 ft sheet.
As far as those elastomeric coatings go, they are junk. I tried "Cool Seal", it was nothing more than white water. Went down thin, takes at least four coats to even cover up the existing material and only lasted one year before it had worn off enough to see the original old roof material.
SAVE YOUR MONEY AND HARD WORK..
If your existing material is not riddled with pin holes consider patching with Eternabond tape, follow instructions on prep and placement and a 99.9% chance it will never let go.
Otherwise I would recommend buying new membrane and replace the entire roof membrane.
If you insist on ignoring the above advice, one last ditch effort several members on the forum have done is to have the roof coated with bedliner.. This is not an "approved" use from the bedliner manufacturers so don't expect them to warranty it..
Not cheap or quick either, takes considerable prep work to get it to stick.
For black bedliner you can paint over top with white paint..
As a hint, not all bedliner products in the stores are all that good.. The ones that slosh in the can are junk.. Goes on watery and doesn't cover well.
One of the better DIY bedliners I have found is from Harbor Freight, not runny and is thick, If you combine with a 20% coupon you can get it for about $35 per gallon. Two coats for best coverage then top with white paint.
