Underpinning
Australian Piling experts
At Piling Experts, we use variety of techniques depending on the access and condition of the site given. Screw piles are the most cost effective and quickest way to support a failed structure. We use a 1-5 tonne piling rig which can access narrow paths and limited ceiling height restrictions. Another method used is the bored pile with the headstock detail; this is commonly used on the external areas of a project when a neighbouring property or building requires support prior to your basement excavation.
Screw Piling Experts – Specialists in Structural Stabilisation
Underpinning is the engineered process of strengthening or restoring the foundations of an existing structure that has settled, shifted, or weakened over time. When buildings experience movement—whether due to soil conditions, age, poor initial construction or nearby excavation—underpinning provides a safe and reliable solution to stabilise and re-support the structure. At Screw Piling Experts, we deliver advanced underpinning systems designed to address a wide range of foundation issues with precision and engineered accuracy.
We understand that every underpinning project presents its own challenges, including restricted access, varying soil conditions, and structural sensitivities. Our team assesses each site individually, selecting the most suitable technique to ensure long-term performance and minimal disruption. Underpinning is not only highly effective—it is often a fraction of the cost of a full demolition and rebuild, making it one of the most valuable investments for preserving residential and commercial buildings.
Underpinning
What is it?
- A system endorsed to help support existing structures that have settled or failed foundations
Benefits of Underpinning with us:
- We have tight access machinery for narrow entries of 1m and short head heights under 2m.
- Cost effective pile techniques for retaining heritage sites.
What Makes Our Underpinning Services Different?
We are widely recognised across Sydney and NSW for our deep expertise and reliable execution of underpinning works. Our approach combines engineering precision with practical, on-site problem solving.
Benefits of Underpinning with Us:
- Tight-access machinery suitable for narrow entries as small as 1m and headroom under 2m
- Cost-effective techniques ideal for heritage buildings and older structures
- Engineered solutions backed by professional certification
- Highly trained team experienced in complex foundation restorations
- Minimal disruption to existing structures and surrounding areas
Every underpinning system we design is tailored to the building’s unique foundation needs and geotechnical conditions.
Why Underpinning May Be Needed
Ground conditions can change rapidly within a single site, which is why we employ multiple strategies to stabilise the bore during drilling. Our team assesses soil type, groundwater level and environmental sensitivities before determining the most appropriate support method.
A structure may require underpinning due to:
- Foundation settlement or soil shrinkage
- Reactive clay movement
- Poor drainage causing soil washout
- Ageing or deteriorating footings
- Additional load from building extensions or renovations
- Nearby construction or excavation affecting stability
- Insufficient original foundation design
Addressing these issues early prevents further damage such as cracked walls, uneven floors, sticking windows/doors, and structural instability.
Tailored Underpinning Methods for All Site Conditions
At Screw Piling Experts, we utilise multiple underpinning methods depending on site limitations and structural requirements. Our experience across homes, warehouses, factories, retail outlets and boundary-constrained properties allows us to deliver solutions that are safe, efficient and compliant with engineering standards.
What We Do
We proudly service Sydney and the entire NSW region, completing underpinning works for homes, commercial properties, industrial facilities and buildings requiring structural remediation. Our role often involves supporting properties during:
- Extensions and additions
- Basement excavations
- Boundary wall reinstatement
- Structural repair for failed or sinking buildings
- Stabilisation before major renovations
Underpinning is a durable, engineered solution that reinforces your foundations and protects your building for decades to come. With proven success across diverse and challenging projects, Screw Piling Experts remains a trusted partner for builders, engineers and property owners seeking reliable foundation restoration.
Frequently Asked Questions
Common signs include cracked walls, uneven floors, sticking windows or doors, sinking or sloping foundations, and visible gaps forming between walls and joinery. If your building shows any of these symptoms, an engineer or underpinning specialist should assess the structure to determine whether underpinning is required.
Screw pile underpinning is ideal for internal areas, tight-access sites and low-clearance environments. It is quick, clean, and cost-efficient.
Bored pile underpinning with headstocks is used in external areas or when neighbouring properties need additional support before excavation. This method provides high load capacity and is suited to complex or deep remediation work.
Underpinning is designed to be as minimally invasive as possible. Our compact rigs can access narrow passageways and low-height areas, reducing the need for demolition or major site disturbance. In most cases, occupants can continue using the property while works are completed, depending on structural conditions.
Yes. In most situations, underpinning is significantly cheaper than demolishing and reconstructing a damaged or unstable structure. It restores the existing foundation, extends the building’s lifespan and prevents further settlement—often at a fraction of the cost of replacement.
Project duration depends on the size of the building, access conditions, the chosen underpinning method, and the extent of foundation movement. Many small residential underpinning jobs can be completed in a matter of days, while more complex commercial projects may take several weeks. A detailed timeline is provided after assessment.
Absolutely. All underpinning systems installed by Screw Piling Experts are engineered, designed and certified in accordance with Australian Standards. We work closely with engineers to ensure all load requirements, soil conditions and design specifications are met before, during and after installation.