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Basement Slab Replacement Problem

Posted by Rob C on March 27th, 1998 04:25 PM

I own an 85 year old house situated on a sandy hill. I want to replace the basement slab, which is in poor condition.
I would like to drop the new slab down 1 & 1/2 feet, since I only have 6 feet of headroom right now.
The problem is that my concrete walls only go as deep as the present slab, and they have no footings!
I have thought about coming out 2 feet from the walls, then building a "retaining wall" down 1 & 1/2 feet, then pouring my new slab.
However, this causes a lot of wasted space.
I have also thought about pouring a new foundation below the walls to the depth I need. However I am worried about the walls shifting on me during the process (very sandy soil all around).
Perhaps I could make the walls more stable by pouring some piling beneath them first?

Any advice would be appreciated!


Rob C

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