Hey gang, I know there has been some discussion on Owens-Corning Cultured Stoned before, but don’t remember this specific issue:
If you look at OC’s website and installation guide to their cultured stone, it is pretty detailed and all, but what I am wondering has any body had experience attaching the stone to a “non-scratch coat” (similar to stucco) wall? What I’m getting at is I’d like to just anchor/screw in, say, some 1/2″ Hardi-Back board to the bare studs of a fireplace surround. I was thinking maybe just anchor the board, perhaps skim on a 1/4″ trowl of thinset, let the latter set, then apply the cultured stones as per installation guide.
This will of course be an indoor application, maybe about 25 square feet all tolled.
Am I barkin’ up the wrong tree and lookin’ for trouble? Thanks in advance for any guidance.
Replies
At the risk of being excommunicated for not following their diections to the T, I set about that much directly against Durock. Used a modified type S--modified it with some acrylic base coat for extra stickiness. No problems. Not recommending anything other than their method....but I have done what you asked about without any problem or expectation of problem.
again not recommending method but the company from whom I've just purchased a Vermont Castings free standing frames up walls, sheetrocks, "scratch" coats w/ thin set - returns next day and applies cultured stone - definitely stuck!
Thanks guys for the help, I figured as much. I suppose for an exterior application I would get more particular.
Just one other question; Cloud, John seems to have had the "scratch coat" of thinset applied prior to placing the stone, did you just butter up the stone with thinset and apply? Or put a thinset "scratch coat" on the duro-rock, then apply buttered stone?
I did some more measuring last night and I am way, way less than 25 sq. ft. I alluded to yesterday. Although not a peninsula, the fireplace kind of jets out of a wall with very minimal sidewall, and at the mantel I am going to go with some wainscoating above to the ceiling.
I used a type S mortar modified with acrylic, rather than thinset per se. It had enough stickiness that I went directly to the durock.