For straightforward cases, it is not essential to provide a deep datum and the survey can be referenced to the point on the property furthest from the perceived area of movement.

However, wherever practical, a drain or other feature on a relatively deep foundation is included in the survey as a check on the stability of the reference point.

Where there is a suspicion that the whole house is moving (e.g. as a result of heave following the removal of large trees), a dedicated sleeved datum can be installed to a depth of at least 5m in an area remote from any retained or removed trees.

Links | Site map | Terms and conditions | Contact us