Structural Concrete Floor Slab Failure - How to repair?

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My girlfriend has been involved in a legal case regarding a house she purchased 4 years ago. It now looks as though the case is about to be settled and at last she can start to plan repairs.

The problem with the house is that the concrete load bearing floor slab has failed and this has caused some of the internal walls to fail where they attach to the outer shell. The cause of the failure is that the sub base beneath the floor was very poor and contained many voids, it seems to consist of whole bricks, bits of old ceramic pipe etc rather than the properly compressed hard core that should be there.

She has several engineers reports and a good plan for the repairs however all of the reports and plans call for a system of underfloor grout injection by a company called "Uretek" to be used to stabilize the voids under the floor slab. I spoke to the Uretek engineer when he was on site and the product and system does sound excellent. I understand that the Uretek system is the favoured insurance company solution to this sort of problem.

My question is if anyone has any experience of this process? is it really the best solution? would it be worth looking into a more traditional repair?

Any experiences, comments, thoughts etc gratefully received.


Thanks in advance.

++++++++++++++++++++++++++++

Anyone been involved in a traditional floor slab repair? Whats involved?

Support upper floors with acros, break up old slab, compact sub surface, etc. Does it really need a specialist? sounds like the sort of thing a competent builder can do?
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Hi There,

I appreciate that your post was in 2004 and didnt appear to get a reply but I wondered if you went ahead with the work through Uretek and whether you could share your experiences in solving the problem. I have a similar problem and I'm currently researching both how I investigate the underlying cause and find a good contractor to supply the solution.

Thanks in advance

Stuart
 
Uretek, and the similar methods work for certain conditions, but not all.

Large voids, and certain ground conditions are not suitable. It's not always guaranteed to work either
 
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Hi yes we did get the work done using the Uretek process and it worked very well. We also modernised a lot of the house at the same time.

We sold the house in 2012 for a good price after fully declaring all the work done.
 

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