CFA (Continuous Flight Auger) Piling

Professional CFA Piling Contractors

At NPG National Piling & Groundworks Ltd, we provide professional CFA (Continuous Flight Auger) piling services for residential, commercial, and industrial construction projects across London and throughout the UK. Our experienced team delivers safe, efficient, and cost-effective piling solutions designed to provide strong and reliable foundations in a wide range of ground conditions.

CFA piling is one of the most widely used piling methods in the construction industry due to its speed, reduced noise levels, and suitability for various soil types. This piling method is ideal for projects located in urban environments where minimal vibration and reduced disruption are essential.

Using modern equipment and proven installation techniques, we ensure every CFA piling project is completed to the highest standards of quality, safety, and structural performance.

What Is CFA Piling?

CFA piling is a low-vibration bored piling technique where a continuous flight auger drills to the required depth. Concrete or grout is pumped through the hollow stem of the auger during withdrawal, maintaining bore stability and preventing collapse.

Typical Applications

Residential developments
Commercial buildings
Urban construction sites
Retaining walls
Medium to high load structures

Advantages

Low noise and vibration
Suitable near existing structures
Fast production rates
No temporary casing normally required
Effective in a wide range of soils

Limitations

Limited suitability in very hard strata
Requires strict concrete control
Reinforcement insertion depth limitations
Potential necking if concrete flow is interrupted

Typical Execution Sequence

Set out pile locations
Position piling rig
Drill to design depth using continuous auger
Record drilling parameters
Pump concrete through auger while withdrawing
Maintain positive concrete pressure
Extract auger steadily
Insert reinforcement cage into wet concrete
Trim pile head after curing

Quality Control

Concrete volume monitoring
Auger extraction rates
Pressure monitoring
Reinforcement depth verification
Integrity testing

Subject To

Detailed design
Suitable ground conditions
Adequate access and working platform
Continuous concrete supply availability