What can go wrong with grouting job?

[teddymom]

We live in Middle Tennessee and an engineering report has named the hole in our crawl space a sinkhole. The engineer's drilling tests also found numerous "voids and vugs" around the perimeter of the house. He has recommended grouting, and our insurance company has agreed to pay for it. Questions:
1) What can go wrong with the grouting procedure? What should we look for?
2) Should we expect our insurance company to cancel us after the repair?
Thanks.

[admin]

Well, I'm going to need more information:

1) What is the bedrock layer? (Limestone/Dolomite/Granite/Slate)
2) At what depth is the repair to commence?
3) What is scope of the repair?

What can go wrong in these types of repairs are the possible issues;

1) The repair does not solve the problem (no warrenties are usually offered with grouting)
2) The repair can cause more damage than currently exists.
3) Repair can actually move soils around and activate a solution cavity and cause severe damage or a large void to open.
4) Repair can bust through the slab and possibly destroy the underground plumbing.

Might be best to send us the engineering and recommendations so we can check this out.