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Practical guides on structural engineering, inspections, drainage and building work.

Looking up at a concrete slab edge where a strip of concrete has broken away, exposing two rusty reinforcing bars, with rust streaks and cracks, against a blue sky and a palm tree

Building defects

What is concrete cancer, and how is it repaired in Queensland?

Concrete cancer is concrete cracking and spalling because its steel is rusting. Repair cuts out the damage, cleans the steel and keeps water and salt out.

Rows of galvanised steel stumps on small concrete footings holding up the timber bearers and joists under a raised house, with bare soil underneath and a lawn beyond

Foundations

Concrete stumps vs steel and timber: which suits your house?

Concrete stumps resist termites but can spall, steel stumps go tallest but need corrosion protection, and timber life depends on durability and treatment.

Underneath a raised timber house: rows of square concrete stumps on bare soil holding up timber bearers and floor joists, with a white slatted screen and garden beyond

Foundations

Restumping in Brisbane: when is it needed and how is it done?

Restumping replaces failing house stumps on new footings. In Queensland a full restump needs building approval, and work over $3,300 a QBCC licence.

A steel spiral auger drilling a borehole into cracked red clay ground, with augered clay heaped around it and blurred gum trees behind

Foundations

Soil classification in Queensland: what does it mean for footings?

Soil classification rates a site Class A, S, M, H1, H2, E or P under AS 2870, mainly by how much its ground may move. The class shapes the footing design.

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