Tallawong Building
Inspections

When a crack needs a ruler, not a guess

Measuring and mapping cracks so the cause can be argued.

Tallawong 2762 · 4 December 2025

In short: Major cracking in concrete and floors examined during an investigation in Forestville.

Not all cracks are equal

A hairline shrinkage crack and a crack that widens through a slab are different problems. Width, pattern and direction tell them apart.

What an investigation records

Each crack is measured, photographed and located, so its progress can be checked later and its cause argued from evidence.

A worked example

At a Forestville investigation, major cracking ran through outdoor concrete, pointing to thin pavement, poor preparation or too little steel.

What clay adds

On Tallawong's reactive soils, changes in moisture move slabs and paving. Cracking near downpipes or garden beds often points there first.

What comes next

If structure is in doubt the report names an engineer. If the matter is headed to NCAT, an expert witness report follows.

Written by our local inspection team from work carried out in Tallawong. Licensed building practitioners, NSW Fair Trading licence 366177C.

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FAQ

Questions Tallawong owners ask about this

What crack width is acceptable?

The 2017 Tolerances Guide sets limits by element and location. A measured width can be compared directly.

Should I monitor a crack myself?

Mark the ends and date them, and photograph with a ruler. It helps any later report.

Will you dig to look at footings?

No. Investigations are non-destructive. Excavation is for an engineer if needed.

Is a crack in paving a building defect?

It depends on the contract and the cause. The report sets out both.

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