If you have a sunken slab on your property, you have a few options:
- Do nothing. If you choose this option, the problem will likely grow. And the longer you wait, the more expensive the repair.
- Replace the slab. The process will take a minimum of several days, is often messy, and is typically more expensive than repair.
- Lift the slab with cement grout. This procedure (known as "mudjacking”) requires heavy equipment, large drill holes and the use of weighty cement grout which may sink over time.
- Lift with high-strength polyurethane foam. This procedure uses light equipment and material, small drill holes and makes less of a mess.
So as far as repair choices go, you are looking at polyurethane lifting vs mudjacking. Here at GCS, we use industry leading AP Lift Foam for a durable and lasting repair. Here's an overview of the differences between AP Lift Foam and the cement grout used in mudjacking: