The garage floor had this basketball-sized hollow spot that thudded when you walked on it, grew worse after the underground spring leak. They injected polyurethane foam and I watched it lift back to solid in under an hour. It's quiet as a church now. Highly recommend for any sunken concrete, no mess and super quick turnaround.

My garage floor had a huge void underneath from all the erosion after last month’s storms. They did polyurethane foam injection and it was like magic. They drilled tiny holes, injected the foam, it expanded and lifted the slab perfect. It's lighter than mudjacking and cured fast. Highly recommend if you’ve got hollow spots, no mess at all and very quick.

I’m impressed with the quality of the repair. The cracks have stopped growing and the house feels solid again.