Wall Crack Repairs in Sydney: A Complete Guide

19 September 2023

Wall cracks, a fairly familiar sight in many Sydney homes, can arise due to various factors including but not limited to settlement, moisture damage, and foundation issues. These imperfections not only mar the aesthetics but can potentially lead to more serious issues down the track. 

Luckily, this predicament can be tackled effectively with timely intervention through professional wall crack repairs. Let us delve deeper into understanding the different types of wall cracks, their common causes, and the strategies to address and prevent them.

Types of wall cracks

When it comes to wall cracks, we generally categorise them into two:

  • Structural Cracks: These are serious concerns originating from foundation issues, posing a significant safety hazard.
  • Non-Structural Cracks: Unlike their counterparts, these cracks are relatively harmless and do not arise from foundation problems.

Recognising the type of crack you're dealing with is the first step towards a successful repair process.

Common causes of wall cracks in Sydney

Before looking into repair solutions, let's familiarise ourselves with the usual suspects behind wall cracks in Sydney:

  • Settlement: Over time, the ground beneath your house can shift and settle unevenly, leading to cracks.
  • Foundation Problems: Be it inadequate drainage or erosion, foundation issues can be a real pain, causing cracks to appear in your walls.
  • Moisture Damage: Be it due to water leaks or flooding, moisture can significantly damage your walls.
  • Impact Damage: Accidents or natural disasters can also be culprits in causing wall cracks.
  • Poor Workmanship: Unfortunately, shoddy construction practices can lead to wall cracks further down the line.

Understanding these causes can guide you in preventing future cracks and treating existing ones.

How to repair house wall cracks

When it's time to address wall cracks, turning to experts is your safest bet. Professional contractors bring a wealth of experience and expertise, helping identify the right wall crack repair methods according to the specifics of the crack at hand. Here’s a rundown of some commonly employed strategies:

  • Injection Grouting: A minimalistic approach where a grout mixture is injected to fill and stabilise the crack.
  • Helical Tie Systems: These involve the installation of helical ties to reinforce the wall and prevent the crack from widening, offering a durable solution.
  • Bricklaying: In the case of brick walls, repointing the brickwork or replacing damaged bricks might be the route taken by contractors.
  • Plastering: For plaster walls, patching or replastering could be the solution to mend the cracks.
  • Rendering: Cracks in rendered walls might necessitate repairs or replacements of the rendering.

The goal here is to choose a method that aligns with the nature and severity of the wall crack, promising long-lasting results.

How to prevent wall cracks in Sydney homes

Prevention, they say, is better than cure, and the same rings true for wall cracks. Here are a few preventative measures that you can adopt:

  • Proper Drainage: Ensuring good drainage will help to keep moisture damage at bay, a common precursor to wall cracks.
  • Prompt Leak Repairs: Nip the issue in the bud by addressing water leaks without delay to prevent wall cracks.
  • Regular Wall Inspections: Make it a habit to inspect your walls regularly, keeping an eye out for early signs of damage.
  • Foundation Maintenance: Never ignore your foundation; seek professional assistance if you suspect any issues.

By taking these preventative steps, you safeguard your home against potential damages.


Wall cracks might be a common phenomenon in Sydney homes, but remember, it isn’t something that you have to live with. Equipping yourself with the knowledge to differentiate between the types of cracks and understanding the possible causes puts you a step ahead in maintaining a crack-free home.

If you find yourself pondering on how to fix house cracks, take the wise route by consulting with professional contractors who can guide you through the repair process seamlessly, ensuring the beauty and safety of your home are uncompromised. Let's nip those cracks in the bud, ensuring a sturdy and good-looking home for years to come!