Mudjacking, also called slabjacking, for foundation repair is a process that raises a sunken foundation by injecting a slurry of material below a concrete slab. The slurry is often a mix of cement and soda ash. Urethane foam injection accomplishes the same result.
This process works fine when the foundation drop was caused by soil consolidation due to poor soil compaction. It is great for regions of the country that only have sandy soil.
Dallas and Fort Worth soils have a high clay content. As clay dries, it shrinks. When clay becomes hydrated, gets moist, it expands.
The simplicity of mudjacking is that for a relatively low cost, it will raise a foundation above the lowered soil. Two of the reasons that Dallas Fort Worth foundation fails are interrelated: clay soil consolidation and clay soil drying.
When mudjacking is performed over partially dry clay soil, it will fill the void between clay and slab, and using relatively low pressure, raise the slab. A problem arises when the underlying clay hydrates and expands. Since the void between soil and foundation is already filled with the mudjacking slurry material, the hydrated clay expansion will push the slab upwards, causing it to heave. So for instance a slab that had dropped 2 inches and been mudjacked to zero, will now rise 2 inches above zero. The soil heave will cause additional house damage.
Granite Foundation Repair never recommends mudjacking on clay soils due to the potential for unintended heave. It is also why we will not fill the void that arises when piers are used to lift a foundation. What we do recommend is Steel Pier foundation repair.
Every home is different, and another solution may fit the situation better, however steel piers provide the highest quality result.
Contact Granite Foundation Repair today for more information.