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For example, hairline cracks that develop during the drying process of new construction are perfectly normal. As well, small cracks could appear at expansion or construction joints as a result of normal settling of the home.

A small crack in your wall doesn't necessarily mean you have a serious foundation problem on your hands. Minor cracks that are only surface level are often harmless and can be patched with a little drywall putty and a new coat of paint.

Many new-build homes develop cracks. These are usually caused by settlement, shrinkage or thermal movement, and are normally nothing to worry about.

The cracks are wide A damaged wall would be considered severe when it's 25 millimeters or wider (2.5 centimeters or one inch) as it could be a sign of structural damage, subsidence (the sudden sinking of a house and its foundations) or something else.

Depending upon the crack width cracks are classified as : (a) Thin Crack - less than 1 mm in width, (b) Medium Crack - 1 to 2 mm in width, (c) Wide Crack - more than 2 mm in width. (d) Crazing - Occurrence of closely spaced fine cracks at the surface of a material is called crazing.

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The most common causes of cracks in buildings are: Ground movement caused by clay shrinkage, land slip, vibration, subsidence, settlement, heave, sway, and so on. Foundation failure due to the decay of soft clay brick, concrete erosion due to chemical contaminants, and so on.