Can brick/stone veneer coexist with double wall construction?
Before I started reading articles here on double walls and dew point issues in the OSB/Plywood sheathing I had intended the following wall construction on a 10″ foundation (4″ ledge + 6″ concrete) wall – 3″ stone veneer, 1″ drainage plane, Tyvek, plywood sheathing, 2×6 load bearing wall, 2″ inch XPS layer, 2×4 interior non-load bearing wall, drywall. Forget all that now.
Clearly that plan was a disaster waiting to happen in that the sheathing would run afoul of the guidelines regarding proportion of exterior insulation with respect to insulation inboard of the sheathing.
The problem appears to be the brick/stone layer limits the ability of a builder to layer on exterior insulation to address the dew point issue without having to expand the brick ledge, inch for inch. I’m not really keen on having to pay for a 13″+ inch thick foundation wall in order to free up 3″ (or whatever is needed to address the dew point issue).
So, are these two features compatible? If so, how to design it?
Secondly, instead of pouring concrete to thicken to foundation wall to create space for the exterior insulation, can the 2×6 load bearing wall be shifted inwards to some degree? Does the entire 2×6 wall have to rest squarely on the foundation?
Thirdly, I came across a reference which noted that shear panels can be located on the interior plane of the exterior, load bearing, wall. Any thoughts on this? That would put the sheathing 5 1/2″ interior to the 1″ drainage plane giving lots of opportunity to rebalance the insulation distribution between outboard to sheathing and inboard. How would this be framed though?
Lastly, where even a fraction of a inch could save money on a foundation pour, how much of the 3″ stone has to rest on the brick ledge. I seem to recall that corbels work on a 2/3 on plane vs 1/3 extension rule, so can the same be applied to the entire stone wall, can a 3″ stone wall rest on 2″ of brick ledge, thus freeing up an additional inch for exterior insulation?
I’d appreciate any insights on how to make this work without increasing the thickness of the foundation walls too much, or at all.