Brisbane Resin Injection

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Brisbane Resin Injection

The foundation of a structure is its backbone, providing the necessary support to maintain its overall integrity. Over time, soil erosion, changes in moisture content, ground movement, or poor construction methods can lead to the deterioration of foundation soils or a reduction in their bearing capacity. 

When this happens, you need resin injection services, and Raise + Relevel are your trusted Brisbane resin injection services provider. 

We’re dedicated to helping Brisbane and Gold Coast homeowners protect their properties’ structural integrity, aiming to resolve common foundation issues such as subsidence, uneven floors, and cracking walls that could threaten the safety and value of your property. From commercial and industrial properties to heritage-listed residential buildings, our experienced and expert team can assist.

What is resin injection underpinning?

Resin injection underpinning is a modern and efficient method to address various foundation problems. When your building’s foundation soils have deteriorated or the bearing capacity has reduced due to various factors, it can lead to problems like house subsidence, sloping floors, cracking in walls, jammed doors, concrete slab repairs, structural issues, and even concrete cancer.

Resin injection underpinning involves injecting a polyurethane resin into the ground beneath the building foundation. The resin expands and hardens, filling holes and voids, improving the soil’s strength and stability, and lifting the concrete slabs back to their original position. This method is also known as slab jacking or concrete lifting.

Benefits of resin injection underpinning

This type of underpinning offers several benefits over traditional underpinning methods: 

  • Fast and efficient: Unlike traditional underpinning, which involves excavating around the property and strengthening the foundation with concrete underpins, resin injection can be completed quickly, often within a day, reducing disruption to your home or business.
  • Minimally invasive: It only requires small holes drilled in the concrete, making it less invasive than traditional methods. This means less mess and damage to your property.

Effective: It can lift sinking concrete slabs, stabilise the soil beneath your property, and rectify problems like uneven floors and cracked walls. It’s a cost-effective solution that provides lasting results.

How does resin injection work?

Resin injection underpinning is a sophisticated process that involves the use of a two-part polyurethane resin. Here’s how it works, step-by-step: 

  1. Assessment: The first step involves thoroughly assessing your property with experienced professionals. R+R will identify the areas with foundation issues and determine the best locations for resin injection. We’ll examine signs of structural distress, such as wall cracks, uneven floors, or doors and windows that stick. This is particularly important in the case of unlevel buildings.
  2. Preparation: Once the problem areas are identified, our team prepares for the crack injection process. This involves drilling small holes into the concrete slab at strategic locations. These holes serve as the access points for the resin injection.
  3. Injection: We’ll prepare the two-part polyurethane resin. The two components of the resin are stored separately until the time of injection to prevent premature reaction. At the time of injection, the two parts are mixed, and we inject the resulting mixture into the ground through the drilled holes. This is known as a concrete crack injection.
  4. Expansion and hardening: Upon contact with the soil, the resin undergoes a chemical reaction that causes it to expand. This expansion fills any voids in the soil, displaces loose soil, and compacts the surrounding area. The resin then hardens, providing a solid, stable base that increases the soil’s bearing capacity. This process can be part of ground improvement strategies.
  5. Lifting and stabilising: As the resin expands, it exerts an upward force on the concrete slab above it. This force lifts any sinking or settling slabs back to their original level, effectively rectifying problems like uneven floors. The hardened resin stabilises the soil, preventing further movement and ensuring the long-term stability of your property’s foundation repairs.
  6. Finishing: After the resin has fully hardened and we’ve made all necessary adjustments, we’ll patch the drilled holes and clean the site, leaving minimal evidence of the work done. This process is part of our comprehensive concrete repair services.
  7. Structural repair: Resin injection is a commonly used method for structural repair, especially in cases of cracked concrete or subsidence damage.
  8. Void filling: Resin injection effectively fills voids within concrete structures, improving their stability.
  9. Leak repairs: Resin injection can be used for leak sealing and water leak repairs in basements, walls, and floors.
  10. Protective coatings: Resin injections can enhance protective coatings on concrete structures, preventing further damage.
  11. Chemical underpinning: Resin injection is a type of chemical underpinning used to stabilise and reinforce foundations.

Resin injection underpinning is a highly effective method for addressing various foundation problems. It offers a fast, minimally invasive, and long-lasting residential solution to subsidence, uneven floors, and concrete cracks. 

By improving the strength and stability of the soil beneath your property, resin injection underpinning safeguards your property against future foundation issues. It’s also the case for public buildings and can be incorporated into underpinning services Brisbane.

When is resin injection underpinning the best solution?

Resin injection underpinning is an excellent solution for addressing a variety of foundation problems, including:

  • Sinking floors: If parts of your home are sinking or your floors are uneven, resin injection can lift and level the concrete slabs.
  • Cracked walls: Cracks in your home’s walls may indicate that your property’s foundation is moving. Resin injection can stabilise the foundation and prevent further cracking.
  • Subsidence: If your property is experiencing subsidence due to issues like soil erosion or changes in the moisture content of reactive clays, resin injection can strengthen the soil and halt the subsidence.

Advantages and disadvantages of resin injection compared to other underpinning methods

While resin injection underpinning has many advantages, it’s essential to understand how it compares to other underpinning methods:

  • Resin injection vs. concrete underpinning: Concrete underpinning provides a strong and durable solution, but it can be more disruptive and time-consuming than resin injection. However, concrete underpinning may be more suitable for properties with severe subsidence or where the soil conditions require a stronger solution.
  • Resin injection vs. pile underpinning: Pile underpinning involves driving steel piles into the ground to support the property’s foundation. While this method can provide a robust solution, it’s often more expensive and disruptive than resin injection.

How can Raise and Relevel help?

At Raise + Relevel, we specialise in Brisbane underpinning and resin injection services. Our experienced engineers and technicians can assess your property for signs of subsidence and recommend the best action. We provide practical solutions to stabilise your home’s foundation, prevent further subsidence, and rectify problems like uneven floors and cracked walls.

Choosing Raise + Relevel for your resin injection underpinning Brisbane comes with several benefits:

  • Fully licensed and insured: We’re a fully licensed and insured Brisbane resin injection company, so you can rest assured you’re working with professionals.
  • Experienced team: We have experienced and trained experts who can handle any subsidence issue. We take pride in delivering high-quality, reliable services.
  • Free consultation: We provide a free consultation to assess your needs and provide a quote accurately. Transparency and customer satisfaction are crucial.
  • Customer-centric approach: We work closely with you throughout the resin injection and underpinning process, keeping you informed every step.

Don’t let foundation problems threaten the safety and integrity of your Brisbane home. Contact Raise + Relevel today to book an inspection and safeguard your property against subsidence.

choose us?


We give you better value, including 10% price beat.


Everyone you deal with is a specialist structural releveller.


We provide a fully guaranteed warranty on workmanship and materials.

Questions you should ask

Your home is everything to you and your family, so before going ahead with any subsidence repairs, we’ve put together a list of questions our customers should ask:

What actual experience in resin injection does the person quoting my job have?

We offer advice, not sales, so we don’t employ salespeople. The person who quotes your job does your job, and has been relevelling homes like yours for over 15 years.

How many homes have you raised and relevelled?

Our specialists have raised over 7,000 homes in total.

What guarantee do I get that the solution is permanent?

If the problem returns, we return. We provide a fully guaranteed warranty on materials and workmanship.

How do I know I’m getting the best value?

At R+R, we have no call centres, no sales people and minimal overheads, all of which enables us to provide the best value for our customers.

Why should I choose you?

R+R will deliver you better value, through real experience, with guaranteed results.