While I have found a lot of information already about anchoring or dowelling the new concrete floor to the existing slab, I have not found anything what to do with my outside wall, which is at the lower level, with wood framing and drywall. What is recommended here?

Also if I pour a new patio, what do I need to do with my siding which will now have 4" of concrete up against it?

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1 Answer 1


I know of several sunken rooms which were raised to the level of the adjacent levels. All of them were done with wooden joists. It seems to me that filling the sunken room with concrete would not be advisable. I would guess that if would be so much extra weight that the existing slab would sink under the added weight. Then there is is problem you mention about the concrete next to the stud wall.

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