Fastening Metal Lath Over Thicker Foam to Foundation Wall
Our foundation walls were just completed and we’re looking to insulate the walls on both the exterior and interior starting with 3-4″ on the outside.
We’d like to face the above-grade portion with a thin stone veneer which requires that we apply MTI Sure Cavity drainage layer, expanded metal lath, scratch coat, etc.
Our drawings (attached) spec’d 2 layers of 2″ foam on the exterior. 1 of those layers is cut off at grade to accommodate the stone veneer.
I would like to apply the stone veneer outboard as much insulation as I can so-as to improve insulation levels above grade, however, I am wondering how much exterior foam can I get away with fastening metal lath and the stone veneer?
Can I do stone veneer over 3″ of foam? 4″ foam? What fastener schedule would I need to use for the metal lath?
Thank you from Wisconsin.
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