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Posted by Robert Barr on July 31, 2005, 1:25 pm
harold wrote:
> I have a raised porch with a concrete slab app. 6ft by 4 ft. The
> concrete slab moves when stepped on, not enough to be unsafe, it just
> wobbles slightly. Inspection indicates the fill under the slab has
> settled, and the left hand corner of the slab goes down slightly when
> stepped on. Before I have the slab broken up and repoured, I was
> wondering if there was any method for injecting some substance under
> the left hand corner to fill the void there. Has anyone expereienced a
> similar situation and been able to solve it without complete removal
> and replacement?
> Thanks for any advice.
>
> Harold
>
>
> maytonh@cox"dot"net
>
> replace the "dot" to respond
>
>
A skilled slabjacker can work wonders. Check your yellow pages. They
do exactly what you mention -- they inject a slurry under pressure,
usually through a hole they've drilled into the concrete. It leaves a
dimple, but it beats replacing a boatload of concrete.
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