Wall Crack Repair in Sydney

What wall crack repair in Sydney actually involves

Brickwork resists cracking where it can and spans areas that lose support, so cracks show at weak points such as openings for windows or doors. CSIRO lists step cracking through the mortar beds, in the body of the wall or above and below those openings, and vertical cracking in the bricks, among the signs of a footing that has lost support. Cracking from settlement during construction usually stays unchanged once the settling stops, which is why the cause matters more than the crack.

Watch first, then decide

CSIRO says monitoring of cracks in walls and floors should always be treated seriously. Note the date you first saw a crack and whether it has grown, and tell the provider, because the answer decides whether the job is a repair or a footing job. CSIRO also notes that where a leak or failed stormwater pipe is the cause, the remedy is to fix that problem.

In NSW, repairing a dwelling is residential building work under the Home Building Act, and a contractor licence is needed for residential building or trade work valued above A$5,000 in labour and materials. This page states no width at which a crack matters: the published width tables we found are contested and lose their columns when reproduced, and a certifier or engineer reads the crack, not a number.

Wall Crack Repair in Sydney — common questions

Is a crack in my brick wall serious?

Often it is not: CSIRO says most cracking in masonry walls is a cosmetic nuisance only. Step cracks that keep developing, or that come with a bouncy floor, are worth having looked at.

Can I just fill it?

You can, but if erosion or local shear is the cause, CSIRO says the cracking will usually continue until that cause is remedied, so the filler may crack again.

Who should look at a crack?

CSIRO says remediation of footings is generally the realm of a specialist consultant. The provider you are referred to inspects the house and quotes; ask what cause the quote assumes.