Mud Jacking

Mudjacking For Outdoor Concrete Repair

Repairing Sinking Concrete Slabs

A sinking front step and cracked concrete sidewalk in Concord.

Concrete steps like those shown above can sink and tilt away from the house if the soil beneath the steps settles or gets washed away.

This creates a safety hazard that needs to be corrected right away. Instead of replacing the stairs, a mudjacking repair can lift the concrete.

What is Mudjacking?

Mudjacking (also known as slab jacking, concrete lifting, concrete raising, grout pumping and slab leveling) is a repair technique for lifting slabs and other concrete elements that have settled over time.

Mudjacking involves pumping a mortar-based mixture of "mud" or "slurry" underneath a settling slab. This injected material is a mixture of water, soil, sand and Portland cement that cures to become a solid, stable fill.

As the mixture is pumped underneath the concrete slab, it fills all empty spaces and creates pressure on the slab that lifts it upwards.

Once injected, the slurry will then harden into a solid fill that's more stable than the soil, yet lighter than concrete.

Mudjacking can also be used as a secondary support for sinking concrete floors by filling voids underneath the concrete as the slab floor is lifted by a slab pier system.

With this method, the slab is supported by piers in contact with load-bearing soils much deeper in the ground. Instead of leaving voids beneath the slab after piers have been used to lift the slab back to its original position, the contractor fills these empty areas with a masonry slurry. This two-part repair is especially common in finished rooms and commercial buildings where a permanent solution is required.

Mudjacking Can Lift...

Sidewalks Steps Walkways Driveways
Patios Pool Decks Concrete Staircases Porches
Parking Lots Streets Paving Stones Highways
A sinking concrete sidewalk in need of mudjacking services in Charlotte.

Benefits of Mudjacking

  • About Half The Cost Of Removal & Replacement Of Concrete
  • Fast, Long-Lasting Solution
  • Installs With No Damage To Yard

When is Mudjacking NOT Appropriate?

Mudjacking is effective for heavier concrete structures when used in conjunction with slab piers. It should not be considered as a standalone solution to lifting a settling footing or floor slab in your home.

In most cases, mudjacking alone will not be able to lift both a slab and the heavy partition walls that sit on top it.

If mudjacking does lift the concrete slab, it may be difficult to control where mudjacking lifts the walls, causing them to lift unevenly.

More importantly, this kind of solution is temporary. Even with the voids filled, the soil below is likely to continue settling over time.

Ultimately, you'd have to call your contractor to your home over and over again to repeat the mudjacking process -- or call someone who can use a different solution that can fix it once and for all!

Mudjacking is also not appropriate as a "do it yourself" repair. Mudjacking requires special equipment and professional experience. All work should be done by a trained, professional contractor who has excellent knowledge of local soil conditions.

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