Over time, as snow and rain absorb into the earth below your concrete it will grow and shrink. As this dirt shifts and moves around, empty spaces can be created. The slab can sink into these holes and eventually create cracks in slabs or spaces between slabs.
There are many factors and situations that can facilitate the settling of concrete. These could include major changes in the moisture level of the soil from rainy weather or a longer period of dry weather that causes the soil to become depleted of moisture and shrink.
The moisture content in your ground will change through the years, it causes the concrete slab on the soil to become damaged. If the ground becomes saturated due to poor drainage, this moisture will cause the ground to become weak and no longer be able to support the concrete.
If the weather is hot and no rain falls for extended periods of time, it will cause soil to shrink. As the soil loses moisture, it will make cavities form under your concrete. As time progresses, these voids cause pressure and put stress on the concrete slab that will eventually cause it to fail.
As the house is being built, the soil is removed and replaced. Once this is done it is very important that it is compacted to the original state as when it was removed. If the soil is not properly compacted, it can speed up the forming of spaces under any slab poured above. These spaces will put unnecessary stress on the slab and can cause sinking over time.
Any place there is soil below your concrete, there is the danger of needing concrete leveling. These are some of the main areas we've seen commercial and homeowners needing our services.
The ideal alternative to removing and re-pouring your cracked or settling concrete is polyjacking.
This is a relatively new technology that makes use of expanding polyurethane foam to raise and restore these damaged slabs back to their intended position. In the past, a method called mudjacking has been used to perform this same procedure. The benefit that polyjacking has over mudjacking is the polyurethane foam quickly expands to fill the void and harden to permanently restore the concrete in position.
If you're in need of permanent concrete slab leveling and raising, contact us today for an estimate.