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Structural & Subsidence Inspection in Krugersdorp & the West Rand
Large parts of the West Rand sit on dolomitic ground, where dissolution of the underlying rock can cause sinkholes and subsidence. If you are buying here, the questions worth asking are whether the property lies in a dolomite risk zone, whether there is evidence of movement, and whether stormwater and plumbing are discharging where they should not.
Covering: Krugersdorp · Roodepoort · Carletonville · Westonaria · Randfontein · Kagiso
What the housing stock here is like
A mix of older mining-era housing and newer development, much of it on ground classified for dolomite risk. The critical variable is not the age of the house but what is beneath it and how water is managed around it.
What actually causes it in Krugersdorp & the West Rand
- Dolomitic dissolution
- Water moving through dolomitic rock dissolves it, forming cavities. When a cavity collapses, the ground above subsides — sometimes gradually, sometimes not.
- Leaking services as the trigger
- The single biggest human contributor is concentrated water ingress: a leaking water main, a failed sewer connection, or stormwater discharging against the foundation. Fixing leaks is genuinely a structural safety measure here.
- Differential settlement
- Diagonal stepped cracking through brickwork, doors and windows that no longer close square, and floors that have gone out of level are the signs an inspector looks for.
- Poor stormwater management
- Downpipes discharging at the foundation instead of being carried away is a common and cheap-to-fix aggravating factor.
Worth knowing before you spend money
A home inspection is not a geotechnical investigation and cannot tell you what is under the ground. What it can do is identify evidence of movement, find the water sources that drive it, and tell you clearly when a specialist dolomite stability investigation by an engineer is warranted before you commit. Anyone offering you a sinkhole guarantee off a visual inspection is overselling.
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Frequently asked questions
Can a home inspection tell me if there is a sinkhole risk?
It can tell you whether there is visible evidence of ground movement and whether water is being discharged in ways that aggravate it. Determining actual subsurface stability requires a geotechnical or dolomite stability investigation by an engineer — an inspection tells you whether you need one.
Is it safe to buy a house on dolomite?
Many thousands of West Rand homes sit on dolomitic ground without incident. What matters is the risk classification of the site, the condition of the structure, and above all whether water is being kept away from the ground beneath it.
What are the warning signs of subsidence?
Stepped diagonal cracking through brickwork, cracks wider at the top than the bottom, doors and windows binding, floors out of level, and gaps opening between a structure and an adjoining slab or stoep.