Heave is an upward movement of the ground that is closely related to the expansion of soils containing a high quantity of clay. When wet, the clay swells and the soil generally cannot expand downwards or sideways, thereby resulting in upward movement. Heave is the opposite of subsidence, but can still cause significant problems and damage to a building.
Surveyors will inspect and determine whether heave has occurred and how it has had an impact upon the building. It may be necessary to drill bore holes to establish the profile of the soil. In some cases, damage caused by heave can be remedied fairly simply; by repairing leaking drains or removing vegetation from the surrounding area.