Underpinning is a method used to strengthen or/and repair foundations of a building, as well as rectify and prevent damage. This is done by adding additional concrete and steel to stabilise and strengthen the existing foundations.

Usually underpinning is required after the existing foundations have failed, or are about to fail. In some cases, underpinning is required to increase the load that the existing foundations can support before renovations or extension work begins and adds additional loads.

Signs Underpinning is Needed

Typically, there will be signs that underpinning is required, both internally and externally, of the building. Signs include gaps between doors, windows and unlevelled flooring. There may even be evidence that structural damage to the slab has occurred.

Signs underpinning is required include: 

  • External cracked bricks 
  • Gaps in brickwork
  • Internal cracks in plaster 
  • Gaps between the doors, windows and walls
  • Uneven floor level
  • Jamming doors and windows
  • Cracked flooring
  • Cracked slab

There are also many reasons as to why the foundations are failing and underpinning is required. These include: 

  • Foundations built on loose soil or uncompacted fill
  • The original structure has changed
  • Soil changes over time  
  • Tree roots close to the foundations or tree removal 
  • Inadequate original structural design for the soil type 
  • Broken pipes or poor drainage 
  • Plumbing faults
Underpinning Brisbane
Underpinning Brisbane
Underpinning brisbane
Underpinning Process

If you notice any of the above, we can help. Our team will come to the site to assess the damage and provide the best possible solution. Once it is determined how much damage has occurred, there are a few different options to rectify it. Our experienced team and qualified technicians will ensure the best outcome.

Underpinning a house typically involves digging new pier footings beside a dwelling, which may include removal of some fences, paths etc. The new foundations have to be dug deep enough to find adequate soil to support the dwelling structurally.

Once the steel is put in and inspected by an engineer, new concrete will be placed into the piers holes. Depending on the damage, the original foundations will either be held in place or lifted back to the correct position by the new foundations added.

We work closely with a company that can arrange structural design plans and a soil test if it is required.

During this process, the pre-existing cracks will be rectified by closing the gaps, and structural integrity will be corrected; however, some cosmetic repairs might still need to be carried out by a builder. FInd out the difference between concerte underpinning and resin injections.

underpinning brisbane
underpinning brisbane
underpinning brisbane
Other Services 

We have years of experiences in the industry which has taught us to deal with a range of issues. Therefore, we also specialise in a variety of other services that include: 

In some cases, the best solution is not underpinning. However, we can still help, our team will be able to identify what the next step is, whether we carry out the works or suggest a different solution.

Contact Us

At Underpinning Brisbane, we work hard to ensure your house foundations are adequate. With over 10 years in the field, and an experienced team, we offer a range of professional services.

So, wait no more, contact us on 07 3054 4775. 

Underpin Brisbane services Brisbane and surroundings including:

  • Brisbane Northside
  • Brisbane Southside
  • Inner suburbs of Brisbane
  • Ipswich