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cfc_sub t1_itz8kwh wrote

36" by any code is not allowed. Are you sure they are stud walls and not dot and dabbed? dot and dab walls will sound hollow as well. I typically shove a screwdriver in the hole and scrape around.

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wolfie259 t1_itz9r2d wrote

It’s a supporting wall with a door and 2 outlets. On the other side is a staircase, so I assumed it had studs. I tried checking for nails in the baseboards but it’s hard to see since the baseboards are a natural finish.

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