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I have a customer who wants to put 3" Polystyrene outside the sheatheing (1/2" plywood) and then add lath and stone veneer. The framing is 2"x6". So you will have the lath with a browncoat over the insulation and then cultered stone mortared to the lath.

The insulation and lath will be either screwed or nailed through the sheathing with long nails.

I'm concerned with the shear strength and pulling away once they add the cultured stone.

Any thoughts?
 

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i agree contact the manufacture
 

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Stone Manufacturer sticks with their standard recommendation - comes under 'take no liability'. Hoping someone has installed something heavy outside of foam insulation and can give their experience.

I think it should work because of lath connecting through to 2x6's
 

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Andy
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Screw another piece of sheeting to the studs through the foam and then paper and lathe . That's still a lot of long screws. A Styrofoam sandwich. I would be concerned about what it is setting on. A small footing of some sort. Screws with a substantial head would be good as well. Timber-tec? my .02 $
 

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I have a customer who wants to put 3" Polystyrene outside the sheatheing (1/2" plywood) and then add lath and stone veneer. The framing is 2"x6". So you will have the lath with a browncoat over the insulation and then cultered stone mortared to the lath.

The insulation and lath will be either screwed or nailed through the sheathing with long nails.

I'm concerned with the shear strength and pulling away once they add the cultured stone.

Any thoughts?
RU Serious?
 

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Perhaps the question should be; Why would it work? :no: Can you list all the reasons such an installation would not fail?
 

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Remote Wall. Go to this site for info regarding a similar technique. We are placing 4-6" of foam over the exterior wall, coving with 3/4 lath then covering with siding of choice. Stucco is not to popular up here but it has been used.

Cold Climate Housing Research Center - www (dot) cchrc (dot) org - Look for those items related to "Remote Wall" construction and configuration.
 
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