I'm looking for suggestions related to my plan to put metal lath over the 2" foam already in place over the poured concrete foundation with a waterproofing spray on the foundation. we will put on a scratch coat then a cultured stone veneer. I know this sounds painstaking but the plan is to drill every 6-8 inches thru the foam and into the concrete. Then we will use # 10 x 4" exterior torx head screws to faster the lath thru the foam and into the poured foundation. Does anyone see a problem with this approach? Builder speced out the insulation so I haven't given much thought to removing it. Even if I were to remove it i would still have to drill into the foundation

Addendum: ran out of room above. Because of the waterproofing spray I think i will need the lath. So do I remove the foam and lose the thermal mass effect of the wall or because lath is or is not needed do i drill thru the foam. the shear on the screws is over 1000 lbs. An inspector in Millwaukee made me pull #9 exterior screws rated at 1150 lbs into hangers and replace them with 1200 lb screws that had a hanger approved symbol... there was no difference in construction of the screw. I know that elevated porch now supports 4 tons per square foot impact load but i digress. at 1000+ lbs per 6 inches square with the stone veneer support I cant see any room for failure. We have used this driil and screw system to install 2x4s into cement to install new construction windows without a hitch. 24" to 8 foot of stone will need to be supported with most areas averaging 36". I'm thinking the spray and the foam give me 2 wrb's and the scratch coat would give me a void when used with dimpled lath. Anyone think I should use 30 lb. or synthetic over the foam and under the lath as an additional wrb? Is this plan crazy on the labor end? anything else that easier and will provide support. I know if we lose the foam we can use other fastening systems that are much easier. we are in northern Wisconsin and I would hate to lose the r10 and thermal mass of the 8" poured wall. we do have r 13 inside the wall in most areas. a very few are r19. This is a year round house with a 9' poured finished basement.

anything else that easier and will provide support

A bolt-on steel brick ledge isn't possible? Or remove the foam and apply it to the interior. With R13 already inside, you aren't getting much thermal mass effect anyway.