How do you tell if a crack in a wall is serious?

For example, a wall crack that goes across the ceiling and then down the wall. This is a sure sign of serious structural damage. Any horizontal wall crack that runs the length of a wall. If the wall is also bowed, it’s even more serious.

What does a crack in a wall tell you?





Vertical and horizontal cracks in drywall or plaster walls typically indicate drying and shrinkage, which is normal after construction. Jagged cracks, stair-step cracks and 45-degree angle cracks generally signify structural movement or settling issues that are occasionally serious but usually harmless.

Why has a crack appeared in my wall?

If your home has walls that are plastered, then straight vertical cracks typically form when the plaster expands in humidity and shrinks as it dries. These are normal and are usually the type of cracks you’ll find in a new build property.

How can you tell if a crack is structural?

Severe – cracks up to 25mm wide could be a sign of structural damage and should be inspected and repaired by a professional. Very severe – any crack above 25mm in width indicates serious structural damage and will need major repair work, which could include underpinning and rebuilding.

Can a house collapse from cracks?

The answer is yes, however, it is also not that simple. It can take years to develop a serious foundational issue that would cause your home to collapse. In most cases, if it does, it’s concentrated on a specific area of the home.

Are cracks in wall normal?





Normal Settling Over Time

As a house ages, homeowners can expect some normal wear and tear, including some minor settling. When this happens, you may notice hairline cracks over doors and windows.

What are the types of cracks?

The most common types of cracks are organised in the following 7 groups

  • Plastic Settlement.
  • Plastic Shrinkage.
  • Early Thermal Contraction.
  • Long-term Drying Shrinkage.
  • Crazing.
  • Corrosion of Reinforcement.
  • Alkali-aggregate Reaction.