![]() ![]() In order to help building surveyors to identify when ground movement had occurred and when structural intervention was necessary, BRE carried out an assessment of 130 properties that had suffered from subsidence. This prompted the industry to look in detail at how the cracks were assessed and what repair works were necessary. Historically, claims on household insurance policies for repairs to buildings after subsidence have increased after periods of very dry weather. Changes in the ground conditions under and around a house can cause it to move slightly, which can lead to cracks to developing in the walls. One of the most unnerving for the occupants is subsidence or foundation movement. Cracks in brick or concrete block walls can be caused by a number of factors. Rupert Pool explains how such cracks can be assessed. The presence of some narrow cracks is usually tolerated and even expected if the house is old, but it is not always obvious what level of cracking is acceptable and when building repairs are necessary. Assessing cracks in houses Everyone is familiar with cracks in the brick or concrete block walls of houses. ![]()
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