Foundation cracks can develop when a house settles. These cracks can be horizontal, vertical, or diagonal. Cracking can be caused by dry shrinkage, overload or other factors. Foundation crack repair can stop them spreading and restore your home's structural integrity. This will prevent foundation problems from getting worse.

There's two main ways to fix foundation cracks. Either strapping or epoxy injections.

Epoxy Injections

Epoxy can be used for fixing foundation cracks in concrete slabs and walls. Epoxy is known for its strength and high resistance to chemicals.

Before epoxy can be injected, the crack's surface needs to be prepared. This involves scraping away any material and cleaning the crack with the chisel.


These Kevlar straps are made from carbon-fiber Kevlar and can be used to seal foundation cracks. These lightweight straps are useful for strengthening foundation cracks and keeping them from moving. These straps can be combined with epoxy injections to fix horizontal cracks in walls. Horizontal cracking may indicate excessive weight against the wall. This cracking could lead to wall collapse.


Underpinning is a technique to prevent foundation settlement and cracking. Underpinning is a method to prevent foundation cracking and settlement.

Underpinning is an option for homes built on clay-like soils. Clay expands when wet. Clay shrinks when dry.

If your foundation cracks, consult a foundation contractor. A foundation contractor will inspect your house and determine the root cause. Then, he or she will recommend the best course of action.

Concrete Underpinning Vs Resin injection Underpinning

Concrete underpinning is the process of excavating sections from a foundation in order to increase its bearing capacity. Then, it is supported with solid strata. Concrete is poured once the concrete has cured.

There is a choice of two types of concrete underpinning.

  1. Concrete underpinning involves the excavation of the foundation in order to pour concrete underneath the footings to increase their bearing capability.
  2. Screw Piling – These are similar to steel screws, but they have been drilled into ground. The foundation is connected to the piles by a firm subground.

It is possible to use resin injection underpinning, which does not require excavation. To prepare the foundation, you will need to drill holes. Resin is injected into ground through the holes. While the resin is still damp, the soil absorbs it. The resin dries and expands, bonding to the soil to make the soil less reactive. This is not recommended due to the potential risk. If they have been damaged or corroded, resin can be used to fill them. Traditional underpinning techniques cannot be used if the foundation is unstable. The traditional method of underpinning should be used whenever possible.

Melbourne Underpinning Group specializes in foundation repair and house bolting. We can exceed your expectations, even with severe cracking. Since many years, we have been supporting Melbourne homes. We are specialists in reactive clay soils. Foundation problems can be solved. To ensure all projects are completed in the agreed timeframes, we use a simplified workflow.