If a full basement wall or a crawl space wall has cracked and buckled or is leaning in, it is necessary to install wall supports to prevent further movement. Excessive inward movement of the wall causes many problems in the basement and on the upper levels of the home. Sheet rock can crack, doors may not open or close properly, flooring can separate, plumbing can separate, water lines and gas lines can be damaged. In extreme cases it is necessary to excavate and straighten the wall. It is very important to have the wall supported as soon as you are aware of a problem.