Efficient bored piling for demanding foundation requirements
Contiguous Flight Auger (CFA) piling provides an efficient bored foundation solution for projects where load capacity, installation speed and reduced vibration are important considerations. A continuous flight auger is advanced into the ground before concrete is pumped through the hollow stem as the auger is withdrawn, forming the pile before reinforcement is installed.
The method can be used across a broad range of ground conditions and is particularly useful on busy or sensitive sites where the effects of driven piling need to be limited. Its continuous installation process also makes CFA piling well suited to projects requiring multiple pile positions and an efficient programme of works. The final pile design and installation approach can be tailored around structural loading, ground conditions and site constraints.
Low Vibrations
Bored installation suited to sensitive sites
High Capacity
Designed around demanding structural loads
Efficient Installation
Productive installation across larger pile layouts
Versatile Application
Suitable across a broad range of project types
How Continuous Flight Auger (CFA) Piling Works
CFA piles are installed using a continuous flight auger advanced to the required depth. Concrete is pumped through the hollow stem as the auger is withdrawn, allowing the pile to be formed while the bore remains supported by the auger and concrete. Reinforcement is then installed into the fresh concrete in accordance with the pile design.
The continuous process makes CFA piling particularly effective where productivity and reduced vibration are important project considerations.
- Low Vibration Installation
- Suitable for high structural loads
- Efficient across repetitive pile layouts
- Adaptable to various ground conditions
- Suitable close to existing structures
Best Suited For
Commercial Developments
Efficient foundations for larger schemes
Residential Developments
Versatile support for new structures
Urban Sites
Reduced vibration near neighbouring buildings
Sensitive Locations
Where driven piling may be unsuitable
High structural loads
Designed for demanding foundation requirements
Repetitive layouts
Efficient installation across multiple pile positions
Need practical advice before you enquire?
Speak to the team for quick guidance on your piling or foundation challenge.
The Process
A clear route from initial enquiry through to quotation and project delivery
Share site details
Tell us about your site constraints & project objectives
Review service options
We compare suitable methods to outline pros & cons, as well as other considerations
Receive expert advice
Get our expert guidance on buildability, programme fit and access.
Move to quotation
We confirm next steps to support smooth delivery throughout the project’s duration
Related Projects
See more of our work
Explore all of our completed projects across various sectors
Frequently Asked Questions
What is the difference between CFA and Rotary Bored piling?
Both are bored piling techniques, but CFA uses a continuous flight auger with concrete pumped during withdrawal. Rotary bored piling provides greater flexibility in drilling tools, pile dimensions and bore-support techniques.
Is CFA piling low vibration?
CFA is generally considered a low-vibration method because the ground is bored rather than displaced by driving.
Does CFA piling generate spoil?
Yes. Material removed by the auger is brought to the surface during drilling and needs to be managed as part of the site works.
What information is needed to assess whether CFA piling is suitable?
Useful information includes the site location, structural loads, drawings, ground investigation data, proposed pile layout and any known access or neighbouring-property constraints. SPS can review the available information and advise whether CFA piling should be considered.