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re: Pouring a new home slab over an old one

Posted on 9/17/21 at 11:54 am to
Posted by CootDisCootDat
St. Charles, The Community
Member since May 2014
1652 posts
Posted on 9/17/21 at 11:54 am to
My parents home burned in 2010. 3rd story attic and all of second story completely gone from fire (started at chimney top on one gable). Entire second floor completely destroyed by water fighting fire. Total loss so they ended up demolishing it. They hauled off everything but the slab. After that, they used the excavator to break it up and bury it. Hauled in a few loads of dirt on top of that and rebuilt a new layout in the same spot. No issues to this day.

I dont think it would be a problem to build on top of it without breaking up and burying but the new house would be 3-4’ higher than the existing finished floor elevation.
Posted by TigerDat
Member since Aug 2010
7640 posts
Posted on 9/17/21 at 1:09 pm to
quote:

dont think it would be a problem to build on top of it without breaking up and burying


I'm not talking about burying. I'm talking about pouring the new slab directly over the old.

I do know in research and speaking with some people, it is completely possible, would require minimum 4" thickness of new slab.

Just not sure economically what's better
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