Chemical Grout Injection | Our Services
Chemical Grout Injection is a Perth based company specialising in underpinning, soil retention, waterproofing, and concrete piles to the residential and commercial construction industry. Work is carried out with the injection of microfine cement and a water reducing agent. This process is referred to as permeation grouting.
Soil Stabilisation, Settlement Underpinning, Basement Waterproofing, Stabilising Failing Retaining Walls, Concrete Piles, Microfine Cement, Pressure Grouting, Permeation Grouting, Perth, Western Australia, Australia
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Chemical Grout Injection is a Perth based company specialising in underpinning and soil retention for the residential and commercial construction industry as well as the domestic market. While we are based in Perth, we are happy to travel anywhere in Western Australia.

Soil Stabilisation
Settlement Underpinning
Basement Waterproofing
Stabilising Failing Retaining Walls

Concrete Piles
Architect Consultation
Microfine Cement


Grout can be installed below an existing structure to solidify the ground retaining the soil under the foundation. This allows deep excavation can be carried out next to the structure without the risk of the structure being undermined. Adjusting the mix allows for the grout to be soft enough to carve with a small excavator but strong enough to stay in place and support the structure.


In cases where a building or structure is subsiding grout blocks can be installed below the footings to improve the bearing capacity of the soil underpinning the building. Often sinking is caused by the soil not being compacted enough prior to construction. We can organise a simple penertrometer test to establish the current level of compaction and determine if the addition of grout blocks will be of benefit.

Once installed the grout blocks will arrest the sinking and ensure that no further damage is caused to the structure. Once settled the building can be monitored to be sure the technique has worked  and then any cracking walls can be repaired and repainted.


Grout injection can be used to waterproof leaking basements. During backfill and compaction of basements small stones and broken bricks etc. can rub on the applied waterproofing compromising the barrier. Rectifying this type of problem from the back of the wall can be messy and sometimes even impossible.

Chemical Grout Injection can install a barrier  through patchable 30mm holes drilled through the wall. A water repelling grout is them pumped into the soil surrounding the leak sealing it from the water in the ground.


Chemical Grout Injection can install a grout block behind failing retaining walls giving the wall relief from the push of the soil being retained. This prevents the walls from complete failure in the future and extends the working life of the wall.

Many walls fail early in their life and are expensive to tear down and reinstate especially in cases where they are supporting structures built after the wall.


Chemical Grout Injection can install in situ augered concrete piles. These are often required for the protection of your home if Water Corporation ever need to dig up or maintain their services that are close to your property. Concrete piles extend the weight of the building foundations deeper into the soil underpinning the structure if  services ever need to be dug up.

Further to this piles can be required if the ground conditions onsite are not ideal for building on. They allow the weight of the building to be spread wider over the soil and can be dug down to solid rock if required.