Characteristic of cracks:Mostly,cracks are inclined shape.and usually they run into the rift of the building surface.If the foundation settlement is uneven,And these uneven lower part of the foundation subside more and more.These kind of cracks appearing on lower part of the buildings are more obvious.They develop from lower part to the upper part.Would look like a V or facing down V ,horizontal and vertical shapes etc etc.When the central settlement of long shape building is too serious,then both ends of a house would show facing up V shape cracks.And first the cracks appear at the corner of the windows.Otherwise,when settlement of both ends are too great,then the cracks of both ends will start from lower part to the upper part,which would be facing down V shapes.They could develop from window corners or bottom parts of the building,or central parts of the building or window sills.The cracks will be vertical and from bottom to top.when one end's settlement is too great,then it would cause other end to have inclined cracks.When settlement of the intersection of two walls is too great,then "wide on the top and narrow on the bottom" kind of cracks will be formed under the corners widow sills.
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