Cobbitty Building
Inspections

Brickwork hanging over the edge of the slab

Why more than 15mm of brick overhang is a major defect at handover.

Cobbitty 2570 · 2026-03-25

In short: Two separate walls on a Cobbitty handover had brickwork projecting more than 15mm past the slab edge.

The measurement

The handover report recorded brick walls overhanging the concrete slab edge by more than 15mm in two locations, which was classed as a major defect.

Why it matters

Brickwork should sit on the slab or footing that supports it. The further it hangs past the edge, the less of each brick is carried.

How it happens

Set out errors in the slab or frame carry through to the brick line. By the time the bricklayer arrives, the slab is fixed.

What follows

The builder should get the engineer's view on whether the overhang is acceptable or needs support. The answer belongs in writing before handover.

Related items

On the same walk, weep holes blocked by mortar and gaps at external walls were noted, both affecting how the wall manages water.

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

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FAQ

Questions Cobbitty owners ask about this

Is some overhang allowed?

A small overhang is tolerated. Beyond the limit, it is recorded as a defect needing engineering advice.

Could the overhang still be dealt with once I have the keys?

Possibly, but negotiate it before handover while you still have leverage.

Would it show at an earlier stage?

Often yes, at frame or lock-up, which is why earlier stage inspections are worth having.

Does warranty cover it?

Structural issues can fall under the six year major defect warranty in NSW if they meet the test in the Home Building Act.

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