Is your house cracking up?
A long, spidery vein is inching its way across the dining room wall. It seems to be spreading even as you stare at it! You’re sure it wasn’t there yesterday! So, what does this mean and how can it be fixed?
Don’t panic.
A crack in the wall doesn’t necessarily mean a major structural problem and more often than not, requires only cosmetic attention.
But what causes the cracking and when should you call a professional?
Here are some of the main causes of cracking –
1. Ground movement/changing environment
The foundations of your house are the actual soil and rock material which your house is built on. In part, blame the Australian summer – long, hot, dry weather. Dry soil has a considerable impact on home structures, causing cracking and movement in brickwork, internal plasterwork or in tiled areas such as the shower or kitchen splashback. Other issues you might notice include creaking floorboards, shifty doorways and sticky windows. Up to almost 90% of all cracking in houses is due to changing water content in reactive soils and subsequent ground movement.
Some of the main culprits for this might include –
- Trees and shrubs
- Climate
- Surface runoff
- Garden sprinkler systems
- Uneven settlement
- Excessive vibration (heavy traffic, earthquakes, significant earthworks)
2. Age
All buildings settle when they are first constructed, but provided the footing/slab design is OK, then settling shouldn’t be a major concern. However, if the bracing and support in the formwork during construction isn’t sufficient, it can result in concrete movement, and therefore, cracking to occur. As buildings age and adjust to environmental conditions, there will naturally be some shrinkage and warping which can cause cracks in plasterboard. Cracking in solid plaster is usually associated with the movement of backing material, which will cause the loss of adhesion. This loss of adhesion is generally caused by the use of incompatible coatings with different shrinkage rates and is the most common problem in older plaster work.
3. Poor structural design or workmanship
Unfortunately, poor design or workmanship can play a part in the demise of a building. If in the building design, overloading occurs or if there are inadequate support structures in the roof or walls, then movement will occur in the building, and this will lead to sagging and cracking.
If a builder doesn’t make the right allowances for shrinkage or movement of concrete in pavings and driveways then cracking may occur in those areas also.
If you are at all unsure about the cracks that you’re seeing, then contact Jim’s Building Inspections for a professional opinion. We can help you work out the cause and extent of the problem and give you some professional advice on the next steps to take.
Contact us today on 131 546 or click here to send through an enquiry.
Conclusion
House cracking can be a sign of minor settling or a warning of serious structural issues. Early detection and professional inspections are crucial to prevent costly repairs and ensure safety. Understanding the causes of cracks helps homeowners take timely action, preserving their property’s integrity and value. Regular inspections by qualified professionals, like Jim’s Building Inspections, offer peace of mind and protect your investment.
FAQs
Cracks can be caused by soil movement, settling, temperature changes, moisture, or structural faults.
No, some minor cracks are normal due to settling, but large or expanding cracks may indicate structural problems.
If cracks are wider than 3mm, appear suddenly, or increase over time, seek a professional inspection.
Inspections identify the cause and severity of cracks, guiding appropriate repairs and preventing further damage.
A general rule is every 2-3 years, or immediately if you notice new cracks or structural changes.
Yes, visible or structural cracks can reduce resale value unless properly addressed.
Repair time varies widely depending on severity, from days for minor repairs to weeks for foundation work.