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Submit your enquiry using the online form with a brief description of the issue. A Mainmark expert will be in touch within 24–48 hours (excluding weekends and public holidays). After clicking Submit, you’ll receive an email with the next steps—please check your inbox and spam folder.

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Subsidence

Should I Book a Subsidence Inspection?

If you have noticed any signs of subsidence around your home, or if you’re worried that your home is suffering from subsidence, it’s time to book a subsidence inspection.

Subsidence inspection are normally carried out by our team, who will look for signs of subsidence and check your house for any other issues. Structural engineers may also provide subsidence surveys and report on their findings.

Early detection and professional assessment are essential for diagnosing subsidence, and a survey will help you understand:

  • The cause of the problem
  • The extent of the problem
  • How to preserve the structural integrity of your home
  • How to minimise subsidence treatment and repair costs

Subsidence Survey – The Process

What Happens During a Subsidence Inspection?

During the inspection, our subsidence expert will:

● Visually inspect your home, looking for signs of subsidence, such as cracks, sticking windows and doors and uneven floors.
● Take measurements to determine if there has been any settlement or movement of the ground.
● Review historic data and records to understand your home’s history and any previous subsidence issues.

The subsidence inspection will ensure a comprehensive analysis of the issue affecting your home, taking into account the size and the layout of the property, as well as the extent of the subsidence.

 

Identifying subsidence

Common Signs of Subsidence Include:

Internal cracked walls

Wall cracks are common in homes and are often the first sign of foundation subsidence. They appear like steps in the brickwork/blocks or tiles and typically follow mortar or grout lines. The mortar and masonry deteriorate over time due to the movement of the affected wall.

Sinking floors

A concrete floor slab within a home can sink due to weak ground or subsidence. A building can sink at various localised points or spread across the entire footprint of the house foundation.

Jammed doors

Doors that don’t open smoothly, have uneven gaps or rub against frames are often a first indication of foundation damage.

Exterior cracked walls

Step wall cracks are common in homes and are often the first sign of foundation subsidence. Wall cracks are usually of concern when one side of the wall is higher than the other, or cracks are wider than about 5mm.

Sinking & uneven concrete slabs

Sinking and uneven concrete driveways or path slabs can indicate unstable ground due to voids beneath the surface. If there is noticeable soil building up around slab joints, the concrete slab can start to crack around the edges as weight is exerted where there is no ground support.

Articulation joints

Usually visible in building extensions where two walls join and in modern buildings at the sides of large windows and door openings. The gap is often wider at the top of the joint, exposing the lining.

Benefits

Mainmark’s Level Correction Methods Are:

Fast

Our technologies have fast curing times and treated areas can be used immediately or without the delays compared to traditional repair methods.

Environmentally Inert

Our technologies use an inert material that is non-toxic and does not leach into the environment or affect the treated area.

Non-Invasive

Our solutions are of surgical nature compared to traditional methods.

Cost-Effective

Compared to traditional methods, our solutions are more cost-effective, with minimal disruption to the area.

Get a quote

Arrange a site assessment in 3 simple steps:

Step 1

Submit your enquiry using our online form. Include a brief message about the type of foundation issues you are experiencing.

Step 2

Our friendly customer service team will be in touch to schedule a site assessment that suits you.

Step 3

One of the Mainmark experts will visit your home or property, assess the damage, and ascertain the likely cause. They will establish the approach needed, creating a plan specific to the needs of your building and provide you with a detailed quote.

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Mainmark

© 2025 The Mainmark group of companies. ‘Mainmark®’, ‘Terefil®’, ‘Terefirm®’ and ‘Teretek®’ are trademarks of the Mainmark group of companies.

Mainmark Ground Engineering Pty Ltd
ABN: 51 606 182 503

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