By QED Consulting Engineers — structural & civil engineers, Notting Hill, Melbourne
A structural crack report is a written assessment by an engineer that determines whether cracks in your home are cosmetic or a sign of structural movement, what's causing them, and what should be done about it. If you've noticed cracking and you're not sure how worried to be, a crack report gives you a clear, professional answer.
Here's what causes cracks in Melbourne homes, when they're serious, and what a crack report involves.
When is a crack in a wall serious?
Not all cracks are a problem — many are harmless shrinkage or settlement. As a general guide, cracks that are wider, that run diagonally, or that follow a "stair-step" pattern through brickwork tend to warrant a closer look, as do cracks that are growing over time or are paired with sticking doors and windows.
Hairline cracks are usually cosmetic. But because width and pattern alone don't tell the whole story, an engineer's assessment is the reliable way to know whether movement is structural.
What causes cracks in Melbourne homes?
Several causes are common across Melbourne, where reactive clay soils are widespread:
- Reactive clay soil movement — clay that swells when wet and shrinks when dry, moving footings
- Slab heave — uneven lifting of a slab on reactive soil
- Footing or foundation movement — settlement or inadequate footings
- Trees and drainage — roots and moisture changes near the home
- Normal settlement and shrinkage — especially in newer homes
Identifying the cause is the key to fixing the problem rather than just patching the symptom.
What does a structural crack report include?
An engineer inspects the property, assesses the cracks (location, width, pattern and likely cause), considers the soil and site, and provides a written report. That report sets out whether the cracking is structural, what's driving it, and recommended action — which might be monitoring, drainage improvements, or structural remediation.
Our residential structural engineering team prepares these assessments for homeowners across Melbourne.
What happens after the report?
If the cracking is cosmetic, you'll have peace of mind and simple repair advice. If it's structural, the report gives you a clear path forward and the documentation you may need for insurance, a builder, or remediation works.
Concerned about cracks in your home? Talk to a Melbourne structural engineer for a clear, professional assessment.
Frequently asked questions
When should I worry about a crack in my wall? Cracks that are wide, diagonal, stair-stepped through brick, growing over time, or paired with sticking doors and windows are worth assessing. An engineer can confirm whether movement is structural.
What causes cracks in brick walls? Common causes include reactive clay soil movement, slab heave, footing movement, nearby trees and drainage changes, and normal settlement.
What's included in a structural crack report? An inspection, assessment of the cracking and its likely cause, and a written report with recommendations — monitoring, drainage, or remediation.
Do I need an engineer or a builder? An engineer diagnoses the cause and whether it's structural; a builder carries out repairs. Starting with the engineer means you fix the right thing.
