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A Quick Guide on Causes of Ceiling Cracks and When to Worry


We have all experienced that unsettling feeling when we spot a crack in the ceiling. Questions like “Is it new? Is it dangerous? Should I be worried?” start to pop up. 

While most ceiling cracks are superficial and can be easily fixed, it is crucial to understand their causes and recognise when it is time to call in ceiling repair specialists. This blog post will delve into the common causes of ceiling cracks, how to identify potentially hazardous ones, and when to worry.

Causes of Ceiling Cracks 

Normal Settling 

According to ceiling repairs specialists, one of the most common causes of ceiling cracks is the natural settling process of your home. As the foundation settles over time, the walls and ceilings may shift slightly, causing minor cracks in the plaster or drywall. It is expected, especially in new constructions or after significant renovation work.

Poor Workmanship 

If the materials used to construct your ceiling were low-quality or the installation needed to improve, cracks may appear over time. Poorly taped drywall seams, inadequate support, or substandard materials can all contribute to the development of ceiling cracks.

Moisture Damage 

Water damage is another common cause of ceiling cracks. Leaks from a damaged roof, plumbing issues, or excessive humidity can lead to moisture seeping into your ceiling, causing the materials to expand, contract, and eventually crack.

Temperature Fluctuations 

If your home is subject to significant temperature changes due to seasonal weather or a faulty HVAC system, the building materials’ expansion and contraction can cause cracks in the ceiling.

Structural Issues 

Occasionally, ceiling cracks can indicate a more serious structural problem with your home. If the foundation or supporting walls are compromised, the added pressure on the ceiling can form cracks.

When to Worry

While most ceiling cracks are harmless and can be easily fixed, there are some instances when you should be concerned. Here are a few signs that your ceiling cracks may indicate a more serious issue:

Wider or Expanding Cracks 

If a crack is wider than 1/8 inch or grows over time, it could be a sign of a structural issue. In this case, it is essential to have a professional inspect your home to determine the cause of the problem and recommend the appropriate repairs.

Parallel Cracks 

If you notice multiple cracks running parallel to each other, this could be a sign of a bowing ceiling caused by excessive weight or structural issues. It can be dangerous and should be addressed immediately by a ceiling repair professional.

Sagging or Bulging 

If the area around the crack appears to be sagging or bulging, it could indicate water damage or a structural problem. In either case, you should consult a professional to determine the cause and take the necessary steps to fix the issue.

Cracks Accompanied by Other Issues

If your ceiling cracks are accompanied by other problems, such as doors and windows that no longer close correctly, sloping floors, or cracks in the walls, it is time to call a professional. These signs could indicate a severe structural issue that needs to be addressed.


While it is normal for cracks to appear in your ceiling over time, it is essential to be vigilant and know when to worry. By understanding the common causes of ceiling cracks and recognising the signs of a more severe problem, you can take the necessary steps to protect your home and ensure its structural integrity. If you are ever in doubt, do not hesitate to consult with a professional, as it is always better to err on the side of caution when it comes to the safety of your home.

If you are looking for a specialist in ceiling repairs in Brisbane, you tap into the expertise of We Plaster & Recruit. We are a licensed and insured contractor that offers top-notch plastering services, so schedule an inspection now!

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