How to Raise a Sinking Driveway

Mudjack Sunken Concrete

• 1

  Identify the center of the sunken area in the concrete driveway. Use chalk to mark two spots about a foot apart.

• 2

  Drill a hole 12 inches deep using a core drill with a diamond tip.

• 3

  Mix concrete in a concrete mixer with small portions of water until it is thick like toothpaste.

• 4

  Pump the mix through the drilled hole to fill the open cavity beneath the sunken section. Continue pumping until the slab rises to its original level.

• 5

  Fill the drilled holes with concrete and smooth the top with a trowel. Wait a day for the new concrete to harden.

Slabjack Sunken Concrete

• 6

  Remove edging from the sunken side of the driveway to slabjack it. Dig out the side with a shovel until you can see where the gravel base begins and the slab ends.

• 7

  Wedge a pry bar between the base and the slab. Push the other end of the bar down with your hands until you're able to lift the side of the slab.

• 8

  Fill the base back up with small gravel and stone dust and press it down with a flat shovel. Add rocks until the sunken base is the same height as the rest of the gravel.

• 9

  Lower the slab back down. Fill in the removed dirt, grass and edging.