Hairline Cracks: Top 4 Causes of Hairline Cracks on Walls

Hairline Cracks: Top 4 Causes of Hairline Cracks on Walls

Hairline Cracks: Top 4 Causes of Hairline Cracks on Walls

Hairline cracks in plaster walls are not uncommon and are purely cosmetic and caused by the slight contraction and expansion of the mortar of the house during seasonal changes.  Other cracks in internal walls may be indicators of more serious underlying issues such as subsidence, poor initial design or structural and foundation defects.

hairline cracks

Cracks in the wall at building inspection may necessitate expert intervention that can be costly.

Why do hairline cracks on walls occur?

Here are a few common reasons:

  1. Contraction and expansion of the  materials  which can be either paint or  plaster because of fluctuations in humidity levels and temperature changes. The movement of contraction and expansion can cause hairline cracks to appear.
  2. Low quality paint or inferior quality paint results in poor paint adhesion on your wall, which leads to cracks over time. In addition, using different paints for each paint coat can also cause cracks on the wall..
  3. Impatience during plasterwork. Not letting cement plaster completely dry before applying paint is actually quite a common factor attributed to cracks.
  4. Poor paint job: Painting an entire house can be a huge amount of work, and it can be tempting to rush through it. But mistakes like missing out layers, or not letting previous layers completely dry can hamper your overall efforts.

A good paint job takes time, so plan around it!

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