An uneven concrete sidewalk, driveway, pool deck, or any other type of slab, is an unsightly trip hazard that lowers your property value and puts you at risk of a lawsuit should someone get injured. Therefore, this isn’t a repair you want to postpone for very long.
It wasn’t that long ago that uneven slabs were fixed either by replacing them, or via a repair method commonly referred to as “mudjacking”. However, both these solutions have serious drawbacks, and that’s why, today, almost all sunken slabs are lifted via polyurethane foam injection.
Mudjacking uses a slurry made of cement, soil, and water to lift the slab. The main problem with mudjacking is the fact that the slurry contains cement, which is very heavy. If the slab sank because the soil couldn’t support it, what do you think will happen if you add even more weight to the soil via a cement slurry?
These drawbacks are why, today, almost all sunken slabs are lifted and leveled via polyurethane foam injection. It’s fast, minimally-invasive, and as soon as the repair is complete – usually in only a few hours – you can immediately begin using the slab again. It’s also a green solution because the foam will not leach harmful chemicals into the soil.