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Question DetailsAsked on 6/23/2016

If two concrete slabs meet and foundation repair work is done, how does this effect the remaining foundation?

when my home was built instead off pouring one big concrete slab, they poured separate ones. now I have foundation issues. My concern is that if the foundation issue is corrected, how does this effect the remaining foundation of the home. I have heard that when slabs meet sometimes when foundation work is done you may have other issues. I am trying to find out what other possible issues? Will the home be leveled? Will there be cost later because of the separate slabs, any information would be greatly appreciated.

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1 Answer


Pouring the slabs in pieces is not in and of itself a problem unless this is a pre-stressed or post-tensioned slab foundation - though if they put a construction joint in midslab they should have prepped the surface at the joint before the new pour and continued the reinforcing through the joint continuously, making it structurally basically one slab (though commonly will crack along the joint as the concrete shrinks in drying).

Each case is different - but assuming you have concrete or block wall foundation walls, then the concrete slabs generally (especially if there is a formed perimeter joint all around the edge) just sit on grade and on or above the base of the strip footer under the wall. Repair the wall in-place without moving it and it should not affect the slabs. Tilt or lift the wall up with jacks or such and the slab will almost always come up with it, leaving a gap underneath which if at all significant can commonly cause cracking of the slab due to lack of support underneath.

You do not say WHAT type of foundation problems you are haivng, but generally a Structural or Geotechnical Engineer should evaluate the problem and product the remedial design for you, which wall almost certainly be needed for a building permit anyway, and for contractors to bid and eventually build to.

Answered 4 years ago by LCD

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