Most residential buildings will be affected by some form of movement at some time in their life. Movement is generally categorised as either being historic or progressive. Historic movement is generally not of particular concern, as its effects (typically thin cracks less than 3mm wide or minor bulging of external walls) can be remedied relatively easily. Progressive movement however, is a very serious defect and can be expensive to remedy. The cause of the movement is ongoing and if left, it will eventually result in structural failure of the building. It will be essential to determine the cause/s of the movement and carry out necessary remedial works.