One of the major factors that cause concrete or slab sinking and slab crack is an unstable foundation. Spaces under the ground that lack structural support may end up breaking down entirely or shifting over time. These factors can make the slab break apart and require slab lifting and slab crack repair to make amendments.
A crawl space is a little unfinished and empty area found in several homes and structures. Such spaces are usually located between the central floor and the ground. This slender width space is a few inches in height, so one can’t stand or walk. Entering such places can only be achieved by crawling.