We underpin foundations across Sydney to stop movement, correct settlement, and strengthen buildings for additional load. Engineered solutions, not temporary fixes.
Sydney sits on some of the most reactive clay soils in Australia. Add poor drainage, tree roots, and decades of wear, and foundations shift. Cracks appear. Doors stick. Floors drop. Left alone, it gets worse.
Underpinning extends or strengthens existing foundations to reach stable ground or distribute loads more effectively. We work with structural and geotechnical engineers to determine the right method for every site.
All underpinning work is carried out to structural engineer specifications, with proper engineering certification on completion. We handle the council process where required.
Not every crack means you need underpinning, but these signs warrant investigation.
The right method depends on soil conditions, the building type, access, and the engineer's assessment. We are experienced in all common approaches.
The traditional method. We excavate beneath existing footings in controlled stages and pour mass concrete to extend the foundation to stable ground. Reliable, proven, and suitable for most residential applications.
A reinforced concrete beam is constructed beneath or alongside the existing footing, transferring loads to a new, deeper base. Used where conventional underpinning is not practical or where greater depth is needed.
Steel screw piles are mechanically driven to stable ground and connected to the existing foundation via brackets. Minimal vibration, fast installation, and effective in restricted access situations. We coordinate with specialist piling contractors and structural engineers.
We inspect the building, review the cracking patterns, and assess site conditions. If geotechnical testing has not been done, we recommend it.
The structural engineer designs the underpinning scheme based on geotech results and the building assessment. We receive detailed drawings and specifications.
Where required, we manage the approval process with the relevant council or certifier.
We execute the underpinning in staged sequences as specified by the engineer. Each stage is inspected before the next begins.
The engineer inspects the completed work and issues certification. Full documentation is provided.
Get in touch with details of the issue. We will advise whether underpinning is likely needed and outline the next steps.
