Attaching Metal Lath To Concrete Walls

mpittman

Gentlemen, I need help. On my personal home, I had a concrete contractor for my home, that also installed my synthetic stone, and stucco to foundation walls. The stone turned out ok on the home, but the stucco is peeling in "sheets" from the foundation walls, especially where the "water proof" application was above foundation. (in some places 3 - 4 feet) I am thinking of removing all the old stucco, attaching metal lath, then re-applying. What is the easiest and best way to apply the metal lath to the concrete walls, or is there a better or easier procedure?

6stringmason

You dont need to apply lathe to concrete walls. Concrete will bond with mortar. But this is a site for professional contractors, not diy homeowners.

Go to http://www.diychatroom.com/index.php and there will be people to help you there.

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laybrick

unless it's very porous, or acid etched, I find that concrete is too dense to get propper adhesion. Therefore, I go the better safe than sorry method, mesh, tapcons & fender washers.

stacker

as long as the concrete hasnt been painted or water proofed with tar or something,it doesnt need lath.ive never had a problem going over concrete with stone or stucco.it doesnt matter if it was block or a poured foundation.

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laybrick

unless you're positive the concrete is free of any residue, visible or not, or take the time to be sure you might as well be safe than sorry. I'll keep meshing it. IMO, the concrete is too dense & creates a cold joint rather than a bond. Thats just my opinion tho. To each his own

sk071077

Im not a mason but down here the stucco guys always put bonding aget on solid concrete.

Tscarborough

This is one of those things where I would not make a recommendation without looking at it in person.

Considering that he has already had issues, the sensible thing to do would seem to be attach lath mechanically.

In general, on clean formed concrete, stucco sticks just fine. Bonding agent is always cheap insurance, and if it is new, there is a good chance that it is contaminated with form release of some sort, which is a bond breaker.

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