Crack Repair in Queensland
Fix structural and cosmetic cracks caused by foundation movement.
What is Crack Repair?
Crack repair addresses damage to walls, ceilings, floors, and foundations caused by ground movement, settlement, or moisture. In Queensland, cracks are often a symptom of an underlying foundation issue — so professional diagnosis before repair is essential.
Signs You May Need Crack Repair
Structural cracks need urgent attention
Wide, diagonal, or growing cracks in load-bearing walls can compromise structural safety and should be assessed immediately.
Moisture and pest entry
Even minor cracks allow water and termites to penetrate walls and subfloor areas, causing cascading damage.
Property value impact
Visible cracks reduce buyer confidence and property value. Professional repair with documentation protects your investment.
After subsidence or heave
Once the underlying foundation movement is stabilised, cosmetic and structural cracks can be properly repaired to restore appearance.
How Crack Repair Works
Identify the Cause
A specialist determines whether cracks are cosmetic (plaster shrinkage) or structural (foundation movement) before any repair begins.
Stabilise the Foundation
If cracks result from foundation movement, the underlying cause must be fixed first — otherwise repairs will fail.
Crack Injection or Patching
Structural cracks are injected with epoxy or polyurethane resin. Cosmetic cracks are raked out and filled with flexible compound.
Finish and Paint
Repaired areas are sanded, primed, and painted to match surrounding surfaces, restoring the original appearance.
Frequently Asked Questions
How do I know if a crack is structural or cosmetic?
As a guide: hairline cracks under 1mm are usually cosmetic. Cracks wider than 3mm, diagonal cracks at corners of windows or doors, or cracks that are growing are structural warning signs requiring professional assessment.
How much does crack repair cost?
Cosmetic crack filling costs $200–$800 for most rooms. Structural crack repair involving injection or underpinning can range from $2,000–$15,000+ depending on the extent of foundation work required.
Will repaired cracks come back?
If the underlying foundation movement is addressed first, repairs are long-lasting. Patching cracks without fixing the foundation cause will result in recurring damage.
Can crack repair be a DIY job?
Hairline cosmetic cracks can be filled by a homeowner. Any crack showing signs of structural concern should be assessed by a professional first — DIY patching can mask serious problems.