Mike Lamb Posted February 12, 2013 Report Posted February 12, 2013 The IRC says stone veneer should be supported by wood or steel at the foundation, and by lintels above doors and windows. I'm seeing cracks in the masonry of this house above the garage door and above a bay window roof. None are supported by a shelf. I'm looking through installation instructions from the Masonry Veneer Manufacturing Association and they don't show any details concerning support of the masonry veneer. Any suggestions? Besides the IRC and this guide that I downloaded from the MVMA, what other authoritative sources can I look at for detailed installation instructions? http://www.masonryveneer.org/pdf/MVMA%2 ... _Final.pdf Click to Enlarge 52.23?KB Click to Enlarge 45.72?KB Click to Enlarge 31.59 KB
Bill Kibbel Posted February 12, 2013 Report Posted February 12, 2013 The MVMA instructions is for adhered concrete masonry veneer, not stone. Your pictures sure look like it's adhered concrete masonry veneer and not real stone. The cracks don't look like it has anything to do with supports. If it is adhered concrete masonry veneer, think of it as a stucco-coated wall with thin slabs of preformed stucco stuck into it. That and the rules for stucco and the MVMA instructions will likely point to the cause of the cracks.
Mike Lamb Posted February 12, 2013 Author Report Posted February 12, 2013 Hmm. That is concrete? How can you tell? I see this rarely if ever. Click to Enlarge 59.5?KB Click to Enlarge 50.86?KB
Tom Raymond Posted February 12, 2013 Report Posted February 12, 2013 If you didn't think it was applied phony stone, how did you end up at the MVMA? They are the lick 'em and stick 'em autority. Was it Mr. O that called this stuff 'lumpy stucco'? It's the best analogy I've seen yet.
Scottpat Posted February 13, 2013 Report Posted February 13, 2013 Yep, it is faux stone...A good way to ID it is to look for repeating stone patterns. Natural stone will not repeat the color shape or size.
BADAIR Posted February 13, 2013 Report Posted February 13, 2013 pic #3 lath installed incorrectly when they snafu the underlying plaster/stucco fundamentals expect it to telegraph through the acmv surfaces
Hearthman Posted February 20, 2013 Report Posted February 20, 2013 Dr. Joe Lstiburek refers to lick 'em and stick 'em stone as "lumpy stucco" because the performance and results are identical with regards to moisture.
Tom Raymond Posted February 20, 2013 Report Posted February 20, 2013 I should have known that. It fits his style.
kurt Posted February 20, 2013 Report Posted February 20, 2013 Or, stucco with funnels. Pre-cracked stucco.
John Dirks Jr Posted February 23, 2013 Report Posted February 23, 2013 Hmm. That is concrete? How can you tell? I see this rarely if ever. Click to Enlarge 59.5?KB Click to Enlarge 50.86?KB One way I verify concrete masonry veneer is air bubbles. Get really close. Use a magnifying glass if you have to. You can see the tiny air bubble holes that develop on the edges of the form when they're made. I know I got pictures of em around here somewhere.
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