Dave I didn't put numbers because too many variables. Here's how I would look at. How far would you allow the bottom plate of a load bearing wall to extend past the edge of the slab before writing that up as needing structural evaluation. If the honey comb is surface only parging more than likely will be ok. If you are not comfortable about it error on the side of caution. Write it up. Refer it to a specailist! (ie licensed individual. contractor. engineer, or a foundation specailist.) This way you have met the standards and your covered.

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Home Inspection Protection,LLC
Buddy Brault