Cracked Walls?

Fast, Cost-Effective Foundation and Wall Crack Repairs

Cracked walls, sticking doors, or uneven floors can all be signs of subsidence, when the ground beneath your home starts to sink or shift, causing the foundation to move.

Mainmark is Australia’s trusted leader in foundation re-levelling, cracked wall repair, and resin injection underpinning.

For over 36 years, we’ve helped homeowners and businesses restore structural integrity, re-support foundations, and prevent further damage, without the need for messy or expensive excavation.

Our advanced resin injection technology provides a fast, clean, and non-invasive solution. It fills voids, strengthens weak ground, and re-levels sinking structures with precision and minimal disruption.

If you’ve noticed cracks appearing in your walls or other signs of movement, contact Mainmark today.

Book your free site inspection and discover how our engineered solutions can restore your home’s stability and stop subsidence in its tracks.

Book a Site Assessment

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Why Choose Mainmark

The Leaders in Foundation Re-levelling & Subsidence Repairs

36 Years In Operation

Australia’s most experienced and trusted re-levelling experts.

In-House Engineers

Brings extensive knowledge and experience to every project.

ISO Accredited

Guaranteeing risk mitigation and operational excellence.

50 Year Product Warranty

Backed by a 50-year warranty and ongoing support you can trust.

Video

Cracked Wall Repair in Action

Our Teretek® Resin Injection technology can raise, re-level and re-support subsiding properties.

This remarkable solution is the key to raising, re-leveling, and re-supporting properties affected by subsidence. Our skilled team of engineers and technicians will guide you through the process, demonstrating how we restore structural integrity and eliminate those troublesome wall cracks.

Trust Mainmark for excellence in cracked wall repair.

Get a FREE Quote

Cracked Wall Repairs

Before & After Treatment

Trusted by over 30,000 Homeowners

See the incredible difference in homes affected by subsidence issues in our “Before & After” showcase. Cracks in walls, both internal and external, often indicate the need for foundation re-levelling. Mainmark’s innovative and non-invasive solutions can quickly raise, re-level, and re-support your home, all with minimal disruption.

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Sinking Foundations Problems
We Solve for Our Clients

Cracked Walls

Fast, cost-effective and non-invasive subsidence solution to fix cracked walls.

Sinking Floors & Slabs

Fast, clean and non-invasive lifting of sinking floors and concrete slabs.

Jammed Doors or Windows

Our solutions are more cost-effective, with minimal disruption to the area.

Out of Level Concrete

We offer the most advanced house re-levelling and underpinning technology in the market.

Earthquake Damage

The world’s most advanced earthquake remediation, liquefaction mitigation and ground strengthening technologies.

Underpinning Repair

Resin Injection – the modern alternative to traditional underpinning. Description here

Benefits & Features

Foundation Re-levelling Solutions & Technologies

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.

Mainmark Google Reviews

Types of cracks

Step Crack

Often found on masonry walls, they appear like steps in the brickwork / blocks and typically follow mortar lines. The mortar and masonry deteriorates due to the movement of the affected wall.

Horizontal Crack

Found running horizontally between bricks and in some instances, they transition to become a step crack. Internally they typically appear as gaps between skirting board and floor or between the cornice and ceiling.

Vertical Crack

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

Expansion Joint Crack

When footings subside, gaps can open at door and windows.

Start measuring wall cracks from the convenience of your home.

If you notice wall cracks around your home that are:

Large cracks that start at windows, doorways or corners of buildings

Cracks wider than 5mm

Jagged, horizontal or vertical, zig-zagged, stepped in brickwork or follow mortar line

These characteristics may indicate weakness in your property’s foundation.

To help you discover if the cracks in walls around you home could be due to subsidence, we’ve developed this handy tool. Download our FREE crack gauge and start measuring and monitoring the wall cracks around your home now!

FREE Crack Gauge

Contact Us – Mainmark

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 commercial 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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FAQ

Frequently Asked Questions

We’ve compiled answers to some of the most common questions our customers have. We strive to provide you with clear and informative responses to help address your concerns.

However, we understand that your situation may be unique, and you might have specific questions not covered here.

Before you carry out wall crack repairs and move on, consider whether there may be a deeper underlying issue. If you’re worried about cracks in your walls, call Mainmark to assess these before the issue worsens.

How do you know if a wall crack is serious?

To determine the seriousness of a wall crack, look for the following signs that may indicate a significant problem with the structural integrity of your home, potentially necessitating extensive foundation repair work, including underpinning and rebuilding:

Width: Any crack wider than 25mm is a strong indicator of a serious issue.
Shape: Cracks that are wider at the top than the bottom, or those visible from the external walls, can suggest subsidence.

These are crucial indicators that should prompt you to seek professional advice and assessment from Mainmark Solutions for a comprehensive evaluation and potential solutions.

What are the different types of cracks?

Step Cracks are often found on masonry walls. They appear like steps in the brickwork/blocks and typically follow mortar lines. The mortar and masonry deteriorate due to the movement of the affected wall.

Horizontal Cracks are found running horizontally between bricks and in some instances, they transition to become a step crack. Internally they typically appear as gaps between skirting board and floor or between the cornice and ceiling.

Vertical Cracks are usually visible in building extensions where two walls join and in modern buildings at the sides of large window and door openings. The gap is often wide at the top of the joint, exposing the lining.

Expansion Joint Cracks are when footings subside, gaps can open at door and windows.

Should I be concerned about wall cracks?

Cracks measuring less than 5 millimeters in width are typically confined to the plaster and can be easily repaired and concealed.
Cracks spanning between 5mm and 15mm in width may indicate more significant structural issues and may necessitate professional repairs.
Any crack exceeding 25mm in width should be thoroughly inspected by a professional.

Mainmark Solutions offers complimentary inspections. If you have concerns about cracks in your walls, please fill out the form, and we will take care of the rest. Your peace of mind is our priority.

How do you know if internal cracks are structural?

Recognising signs of structural cracks in your foundation:

Stair-step cracks.
Cracks on foundation slabs or beams.
Vertical cracks that exhibit varying widths, typically wider at the bottom or top.
Cracks measuring 1/8″ in width.

If you’re uncertain about the nature of your internal cracks, Mainmark Solutions is here to assist you. Contact us for expert guidance and a free assessment. Please fill out the form.

What is an example of a structural crack?

Structural cracks often come with clear indicators that set them apart from cosmetic cracks. Here are some common signs of structural cracks to look out for:

Sloping Floors: If you notice that your floors are no longer level and exhibit a noticeable slope, it can be an indication of a structural issue.
Difficulty in Closing Doors and Windows: When doors and windows become challenging to close or start sticking, this could be due to the movement caused by structural cracks.
Various Shapes and Sizes: Structural cracks are diverse in appearance, ranging from horizontal, vertical, and diagonal lines to those resembling a staircase pattern within foundation blocks.

If you suspect structural issues in your property, Fill out the form today. We’ll promptly arrange a free inspection to assess the situation. Your peace of mind is our priority.

Is structural crack damage covered by insurance?

Your property insurance typically covers the repair of structural damage caused by subsidence, including cracks. However, it usually doesn’t cover the expenses related to preventing further subsidence and home movement.

Fill out the form for further assessment, and one our experts will be in touch with you.

How much does it cost to repair wall cracks?

The cost of repairing wall cracks can vary depending on the specific circumstances of your foundation. To provide an accurate estimate, we recommend scheduling a free site inspection with one of our experts. They will assess the damage and provide you with a customised quote based on your unique situation.

Fill out the form now, and one of our experts will promptly arrange a free inspection to assess the situation.

Get a FREE Quote

Cracked Walls?

Fast, Cost-Effective Foundation and Wall Crack Repairs

Why Choose Mainmark

The Leaders in Foundation Re-levelling & Subsidence Repairs

36 Years In Operation

In-House Engineers

ISO Accredited

50 Year Product Warranty

Video

Cracked Wall Repair in Action

Our Teretek® Resin Injection technology can raise, re-level and re-support subsiding properties.

Cracked Wall Repairs

Before & After Treatment

Trusted by over 30,000 Homeowners

Sinking Foundations Problems We Solve for Our Clients

Cracked Walls

Sinking Floors & Slabs

Jammed Doors or Windows

Out of Level Concrete

Earthquake Damage

Underpinning Repair

Benefits & Features

Foundation Re-levelling Solutions & Technologies

Fast

Environmentally Inert

Non-Invasive

Cost-Effective

Mainmark Google Reviews

Types of cracks

Step Crack

Horizontal Crack

Vertical Crack

Expansion Joint Crack

Start measuring wall cracks from the convenience of your home.

Contact Us – Mainmark

Arrange a site assessment in 3 simple steps:

Step 1

Step 2

Step 3

FAQ

Frequently Asked Questions

How do you know if a wall crack is serious?

What are the different types of cracks?

Should I be concerned about wall cracks?

How do you know if internal cracks are structural?

What is an example of a structural crack?

Is structural crack damage covered by insurance?

How much does it cost to repair wall cracks?

Locations

Mainmark Sydney

Mainmark Melbourne

Mainmark South Australia

Mainmark Queensland

Mainmark Perth

Mainmark Tasmania

Sinking Foundations Problems
We Solve for Our Clients