Save your slab! Slab piers may be used to lift and level settled slabs, eliminated sloped and uneven floors.
Homes built upon concrete slabs can experience the same settlement issues as homes built on basement or crawlspace foundations. MasterDry Slab Piers are designed specifically for raising and realigning concrete slabs that have settled.
There are two types of slab piers: push-type slab piers and helical slab piers. Both products can be effective, and selecting one over the other depends on your situation and the preferences of the contractor who is installing them. Compact installation equipment allows either pier type to be used even in tight-access areas, such as bathrooms or laundry rooms.
Step 1: The soil at each pier location is exposed by drilling holes through the concrete slab. With hydraulically-driven slab piers, a bracket is positioned in the hole so that the flanges on the bracket extend to support the underside of the slab. With the bracket in place, steel pier sections are hydraulically driven through the bracket until the pier contacts competent soils. With helical slab piers, the pier shaft is rotated while downward pressure is applied. The pier’s helical blades advance the pier into the soil and provide anchoring strength once competent soil is reached. A slab bracket is positioned around the pier and beneath the concrete slab once the pier reaches its proper depth.
Step 2: The weight of the concrete slab is transferred through the piers to the deep, stable soil. A lift can then be attempted to bring the slab and interior partition walls back to their original position.
Step 3: Grout is carefully pumped at a low pressure under the slab to fill the void created by the soil settlement and slab-lifting process.
Step 4: Holes at pier locations are filled with concrete, leaving the floor permanently stabilized in its new position.
Changes in the soil conditions beneath your home cause slab damage and settlement. The weight of your home can cause loosely compacted soil to compact over time, creating a void beneath your slab. Similar voids are often the result of erosion caused by excessive water, leaks, and plumbing or HVAC lines. Extended drought periods may cause the soil beneath your home to contract. When your slab cannot support the weight of structure across the span, it will crack, break and sink into the void beneath your home.