IN Brief:
- The Federation of Piling Specialists analysed 63 projects representing approximately 330,000 tonnes CO₂e and £618m of member turnover.
- New metrics compare emissions with turnover, hours worked, and concrete volume across principal foundation techniques.
- The baseline gives the sector a reference point for measuring future improvements in materials, design, construction methods, and reporting.
The Federation of Piling Specialists has established a new carbon baseline for the UK foundations sector using data from 63 projects, creating a reference point against which future reductions in embodied emissions can be measured. The work covers approximately 330,000 tonnes of carbon dioxide equivalent associated with £618m of member turnover.
The exercise moves foundation carbon reporting beyond simple comparisons between total project emissions. Piling and specialist foundation schemes can differ sharply according to ground conditions, structural loads, pile type, reinforcement quantities, concrete specification, access, programme, and construction method, making project totals difficult to compare without additional context.
FPS has therefore related emissions to several measures of activity, including tonnes of carbon dioxide equivalent per £1m of turnover, per hour worked, and per cubic metre of concrete installed. The intention is to give contractors a better view of carbon intensity as well as absolute emissions.
That distinction is important for a sector in which high emissions can simply reflect large quantities of installed foundation. A substantial project may produce a large carbon total but perform relatively efficiently against its installed volume, while a smaller scheme can carry high carbon intensity where difficult ground, heavy reinforcement, logistics constraints, or conservative design increase material use.
The new dataset also allows existing embodied-carbon benchmarks for different foundation techniques to be revisited against current project evidence. Rather than treating older reference values as fixed, the baseline provides a point from which the sector can track changes in materials, plant, design practice, and installation methods.
Concrete and steel remain central to that work because deep foundations can require large quantities of both. Cement content, reinforcement ratio, pile dimensions, spoil generation, plant fuel, transport, temporary works, and site energy can all contribute, although their relative importance varies considerably between foundation systems.
Design decisions made before a piling contractor reaches site can be equally significant. Pile diameter, depth, spacing, reinforcement, load assumptions, testing strategy, and the extent to which existing foundations can be reused all influence the amount of new material required.
Ground investigation also affects the outcome. Better geotechnical information can allow engineers to reduce uncertainty and refine design assumptions, while poor information can lead to conservative solutions carrying greater quantities of concrete and steel than might otherwise be necessary.
That places some of the most useful carbon decisions early in the project cycle. By the time a specialist foundation package is fully procured, structural loads, building form, basement depth, and much of the foundation strategy may already be fixed. More comparable sector data gives clients and designers a stronger basis for testing alternatives before those choices become difficult to change.
FPS has already been developing carbon-reporting practices across its membership, including use of the EFFC-DFI Carbon Calculator. Its wider sustainability work has also examined project and company reporting, pile reuse, and consistency in the way foundation emissions are measured.
Consistency matters because apparently precise carbon figures can still be misleading when organisations use different boundaries, emissions factors, material assumptions, or reporting periods. A common sector approach makes it easier to distinguish a genuine reduction in carbon intensity from a change caused mainly by accounting methodology.
The 63-project baseline is therefore a starting point rather than evidence that foundations have already been decarbonised. Its value will depend on repeated reporting and on identifying where particular techniques, project types, materials, or site conditions consistently produce higher emissions.
That evidence can then direct effort towards changes with measurable effect. Lower-carbon concrete, more efficient reinforcement, design optimisation, plant efficiency, logistics planning, and reuse of existing foundations may all reduce emissions, but their usefulness will differ by project.
The same dataset could improve option appraisal. Where two foundation strategies can satisfy structural and geotechnical requirements, carbon intensity can sit alongside cost, programme, settlement, buildability, risk, and construction logistics rather than being assessed after the preferred solution has already been selected.
None of that removes the fundamental requirement for safe and durable foundations. Carbon reduction cannot take precedence over geotechnical performance, but better data gives engineers a way to identify unnecessary material and compare technically viable options on a more consistent basis.
For contractors, the important change is that future performance can now be measured against a baseline drawn from real foundation delivery. The useful test will be whether later datasets show emissions intensity falling while comparable construction output is maintained — a considerably tougher measure than publishing another long-term carbon target.
