What is slab lifting?
The most cost effective and common method of repairing large uneven concrete slabs is by simply raising the sunken slabs back up to their original level. Also known as mud jacking, slab lifting is simply that – lifting the sunken slab back up to its rightful place.
Slabs sink for a variety of reasons: poor preparation before the slab is poured, soil erosion, soil movement. Ultimately there is less soil or gravel beneath the concrete to hold it up and it settles.
Slab lifting simply and economically replaces the missing soil with a sturdy material that can lift and hold the slab at the correct elevation. Rather than using the traditional grout for slab lifting, Con-Restor uses polyurethane high density foam that is not prone to erosion or shrinking. Traditional grouts are mixed with water and can wear away over time. They also required much larger injection holes which are frilled into the surrounding concrete and are then patched after the job is completed. Not only are these large injection holes unsightly, they also can create maintenance and wear problems.
Polyurethane high density foam only requires small 5/8 inch diameter holes and less of them than grout. These are much easier to patch and are much less visible when the job is completed.
The polyurethane foam is also much lighter than the traditional grout, putting less stress on the underlying soil further reducing the potential for future erosion. While light, the foam can easily lift your slab and have it even and back in use in less time than traditional grout which requires time to set up.
Not only is slab lifting more economical and faster than removal and replacement of the sunken concrete, it provides a better finished product as the lifted concrete matches the surrounding concrete and will not stand out.