Defect type
Critical · 2–5/5
Concrete Slab Cracking and Heave
Cracking in concrete ground floor slabs caused by reactive soil heave, shrinkage, or inadequate reinforcement. Common in Perth sandy soils and Sydney clay soils with seasonal moisture variation.
Causes
- Reactive soil heave or shrinkage
- Inadequate slab reinforcement
- Tree root desiccation of foundation soil
Symptoms to look for
- Visible cracks in floor slab exceeding 1mm width
- Uneven floor levels detectable with spirit level
- Doors and windows binding or sticking
Remedies
- Slab levelling via polyurethane resin injection
- Tree root management and soil moisture stabilisation
- Structural engineer assessment for remedial design
Critical
Get an inspector through this property.
Findings in this category skew high severity. If you are under contract, we can usually book inside the cooling-off window. Every inspection includes 12 months of free advice.
Same category