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07-11-2007, 01:11 AM
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Acorn
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Join Date: Jul 2007
USDA
Posts: 10
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Veneer Mix
Im veneering an existing patio of brick and concrete. Will S-type mortar mix be strong enough to hold the 1-1/2" flagstone on? Should I use some kind of Portland mixture?
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07-11-2007, 04:20 PM
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Gold Oak Member
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Join Date: Nov 2005
Location: Monroe, NC
USDA Zone 10
Posts: 678
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That's what we use and make the mixture a little stronger than what we would use to join block or brick.
Another product that we have used in called StoneHold and seemed to work real well with synthetic stone, have yet to try it on natural stone.
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07-11-2007, 05:15 PM
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Acorn
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Join Date: Jul 2007
USDA
Posts: 10
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awesome! im also veneering flagstone onto the concrete pad atop the brick...should I use some kind of binding agent to make the mortar take to the older cocnrete?
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07-11-2007, 05:42 PM
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Acorn
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Join Date: Jul 2007
USDA
Posts: 10
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also, will I need to apply metal lath to the brick porch? im not sure if it is sealed or not, I dont know how to tell
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07-11-2007, 06:03 PM
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Administrator
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Join Date: Jan 2003
Location: Wisconsin
USDA Zone 4
Posts: 7,553
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Metal lath on a horizontal surface? Nope.
Re: the veneer over brick - were these brick mortared to a slab to begin with? If not, you really shouldn't mortar anything over the top of them, as it will shift and crack into many, many pieces.
You might want to mix in some dry-block for this at-grade work. Makes the mortar withstand water a bit better.
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07-11-2007, 11:03 PM
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Gold Oak Member
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Join Date: Nov 2005
Location: Monroe, NC
USDA Zone 10
Posts: 678
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Oh! I wasn't sure of your exact application but I was talking about a vertical veneering on a block or concrete wall.
I don't believe I've ever laid flagstone over brick which is over concrete.
Good Luck and keep us updated.
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07-22-2007, 12:43 AM
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Acorn
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Join Date: Jul 2007
USDA
Posts: 10
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the veneer went great, especially when I switched to S-type mortar mix, from the regular Quikrete stuff. One problem...while grouting the joints, I stained the stone and some of the joints look real bad...I heard I can use acid to clean the stones. What kind should I use? Also, what can I do to smooth and fine-finish my shabby mortar-joints?
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07-22-2007, 02:56 PM
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Administrator
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Join Date: Jan 2003
Location: Wisconsin
USDA Zone 4
Posts: 7,553
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If the joints are already dry, then you're stuck with what you have, short of breaking out the joints and re-pointing them. As for the stains, you can try scrubbing first; if that doesn't work, use a diluted muriatic acid. It can be found at any hardware store.
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07-23-2007, 07:16 PM
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Acorn
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Join Date: Jul 2007
USDA
Posts: 10
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thanks...so whats the best way to remove the joints so that I can repoint them? a file? a dremel?
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07-23-2007, 10:01 PM
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Administrator
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Join Date: Jan 2003
Location: Wisconsin
USDA Zone 4
Posts: 7,553
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An angle grinder with a cup/blade made for masonry works pretty well.
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07-24-2007, 09:21 PM
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Acorn
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Join Date: Jul 2007
USDA
Posts: 10
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would a circ saw work? maybe a little too much overkill
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07-24-2007, 11:36 PM
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Administrator
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Join Date: Jan 2003
Location: Wisconsin
USDA Zone 4
Posts: 7,553
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Maybe - and you'd wreck the saw.
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