Why Do Walls Crack?

Contraction and expansion: the materials (paint, plaster) that make up your wall contract and expand because of fluctuations in humidity levels and temperature changes. This is usually a problem if the wall is within a room that is periodically air-conditioned or it faces the afternoon sun quite a bit.

Why Do Walls Crack?

Cracks in walls can cause concern, not least because of the potential damage they can cause. It’s important to know the causes of wall cracks and how to treat them so that, if necessary, you can take steps to minimize the risks of further damage to your home. Wall cracks can appear in different shapes and forms for a number of reasons.

The most common type of wall crack is caused by thermal expansion and contraction. Different temperatures cause the materials that make up your home to expand and contract. It’s a fact of nature that is especially common in the hotter and colder months of the year when the outside temperatures see extremes. With walls that are already built, each panel of the wall is somewhat restricted from moving as temperatures change. That means that any accompanying expansion and contraction of the material will cause pressure that can lead to the formation of cracks over time.

Structural issues can also cause cracks. Shifting foundations, for example, can create tension at the points where walls and floors meet. Those points become strained, leading to cracks. Other forms of structural damage can also cause wall cracks, such as water damage, soil shifting or soil saturation, or even frozen soils in colder climates. All of these external

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