The cost of injection crack repairs can vary greatly, depending on the size and length of the crack, as well as the amount of labor, time and equipment required to complete the job. Generally, the best way to fix a sinking foundation is by installing concrete pillars under the foundation and raising them to hold the house at the proper level. Cracks in the base of bricks and blocks can spread in steps along the joints of the bricks, vertically or horizontally. The cost of repairing a crack using polyurethane injection is usually several hundred dollars and most basement waterproofing professionals will offer a reduced rate for multiple cracks.
In some cases, this can be beneficial for prospective homeowners, as foundation repairs can help rather than hinder buyers from purchasing in subdivisions with known foundation problems. It is important to repair a foundation as soon as possible, as not doing so can lead to additional problems that cannot be fixed and make the structure unsafe for living in. Some signs that may appear on the outside of your home include multiple cracks in walls or foundations, walls that bulge or arch, cracked or crumbled bricks and concrete, insufficient drainage and accumulated water, separation at the corners of doors and windows, and expansive clay or soil issues. In some parts of the country, a masonry foundation is built on top of concrete foundations, most often from concrete blocks, also known as “concrete blocks” or CMU (concrete masonry units).
Another factor to consider when repairing exterior foundation cracks is anything on the road outside that needs to be moved. A professional will pump a slurry mixture into the space under the concrete base and float it back to its original position. Leaks in underground structures such as underground tunnels, sewers and mines cannot be repaired by traditional excavation and waterproofing methods; this challenge necessitated the development of injection technology to fill gaps in concrete with specialized resins to stop and repair water cracks. Foundation repair is not usually covered by insurance; however, there are some cases where it could be.
In areas with notoriously poor soil quality, foundation repairs and improvements act as an attractive selling point. Every situation and base is different, so it is important to ask your foundation repair professional what type of repair is best for the type of soil underneath your home.