Raise Concrete Slab

Locate the dips get the right equipment and foam.
Raise concrete slab. A good solution for diyers. Smaller sections of sunken concrete can be cut out using a wet saw and then lifted out with a crowbar. Push the plugs flush with the slab then use sponge to clean the area around the plugs. Sand also has air in it but it may be a better option for the do it yourselfer trying to raise concrete.
Mud jacking can lift a settled concrete slab by pumping a grout through the concrete and pushing it up from below. Foam jacking is a concrete slab repair method that uses a high density polyurethane foam to raise the slab. Slabs also can crack flake or deteriorate making them more of a liability than an asset. Sometimes slabs settle over time allowing annoying puddles to form whenever it rains.
If it is done correctly. Once the slab is level cement the concrete core plugs back into holes. Holes should be no less than six inches away from the edge of the concrete. 1 to 1 5 8th inch diameter holes are drilled through the sunken concrete block slab at strategic locations to maximize lift.
So how do you raise a concrete slab with foam. The foam will fill up the parts of the concrete that are uneven and will raise it to the proper height. As the mixture flows beneath the surface voids and depressions are filled and the slab is raised to achieve the desired height. Continue to pump grout into the holes a little at a time until slab starts to rise up.
Use 5 8 inch masonry bit to drill a hole through the concrete and spray the foam into it. There are several reasons why you might want to raise the level of a concrete slab. The 6 ft x 6 ft sidewalk slab at our front stoop had sunk on one end to a 10 1 2 inch step. Slabjacking is a major undertaking that shouldn t be done by an amateur.
This process is much the same as mud jacking an older method that uses a concrete slurry mixture to obtain the same results. Once the holes have been set the geolift is injected in between the concrete and the dirt. Use a hydraulic concrete pump to pump the grout through the core drill holes. The process is sometimes called slab jacking or pressure grouting.
The first step is to drill holes in the problem concrete. It caused people to trip stepping up and to st.