Foundation cracks are often identified only when they start leaking water into the basement. You then call up waterproofing companies to find out foundation repair cost. However, the cost may vary considerably depending on the type and extent of the crack.
One of the simplest methods of foundation wall crack repair will be injection of epoxy-based glue that is applied inside the crack under low pressure. The glue fills the crack and repairs the leak from inside. This works effectively for structural crack repair. When the epoxy cures (hardens), it binds two sides of the wall. A single crack repair takes about two hours. The cost is less than $500. Reputed repair companies provide written and transferrable warranty of more than 20 years. In some cases polyurethane resin is injected in the cracks that gives almost same result at about the same cost.
In exterior foundation crack repair, a waterproof barrier coating is applied over the cracks that prevent entry of water. It does not repair the cracks but seals it to stop entry of water. It takes some time to locate the crack before the application of the layer of rubber-based membrane. It takes longer time than the epoxy injection (almost a day to excavate the site) and the cost may be more than $1000. This process also comes with a written warranty.
Foundation repair cost can be high if the building has experienced foundation settlement. It leads to severe structural problems. Concrete foundation can be repaired but the cost can be as high as $10,000 or more when it involves hydraulic piers. The repair cost goes up if there are serious problems with the foundation. This can happen if it has been developed on expansive clay or if the soil was not properly compacted. Poor maintenance can also lead to serious damages like settling or movement of the foundation. Before it starts affecting the interior of your home, get it repaired with the help of professional waterproofing companies.
Such companies would look into the structural report prepared by a professional structural engineer before deciding on the methods of repairing. In most of the cases these reports are unbiased and without any motive of selling any product. After ****yzing the report the company will take methods like piering and slabjacking to lift the foundation that is a sinking down. In the first process, supports are placed beneath the structure that keep it in place. In the second process a mixture of grout is pumped under the concrete foundation to float it back into its original position. These are permanent solutions but costly.
Average foundation repair cost is around $4000 nationally. But only after surveying your property the waterproofing companies will be able to quote you the exact cost. It is very important for you to find out a reliable and reputed company that would give warranty for their work. Before signing the agreement look for their reviews and feedback and ask people who have appointed them for similar kind of work.