Most of the foundation repairing service companies also conduct the necessary testing, both to identify problems and ensure the after-repair quality of work. However, in some cases, certain companies that only specialize in foundation testing services, and not repair, may exist, and be consulted or retained for the testing portion of any foundation issues. It is not common, as most foundation repair services consider being able to test and identify the problems for themselves as essential to safe and effective foundation repair solutions. Therefore, specialized foundation testing services may work directly with foundation repair service companies to ensure post-repair quality.