Sub-base & capping

6F2 capping fill, 0–125 mm

6F2 is a coarse recycled capping fill graded 0–125 mm, the most widely used capping material on UK earthworks. It builds a stable working platform over soft formations quickly and cheaply, and is the usual first import onto a site once the muckshift is under way.

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Key specifications

Grading: 0–125 mm coarse graded
Specification: Clause 613 capping (Class 6F2)
Material: Recycled crushed concrete and hardcore
Typical layer thickness: Commonly 250–500 mm, per design
Supply formats: Loose tipper, artic bulk loads
Typical load: 16–20 t tipper, 28–29 t artic

Typical uses

General capping fill over weak subgrades
Site haul roads, compounds and crane platforms
Bulk level-up and fill on earthworks schemes
Piling mat build-up where design permits

Lead time and delivery

Sourced from regional recycling facilities — typically 2–4 working days depending on postcode and depth of stock, with test data supplied on request. On larger schemes we hold production against your programme so call-offs stay on date.

Tipper, grab and artic haulage. Where we are also removing surplus from your site the same lorry returns loaded, cutting haulage cost and empty running.

Frequently asked questions

Is 6F2 the same as crusher run or hardcore?

They overlap in practice but are not interchangeable on paper. 6F2 is a specified capping grading under Clause 613 with defined limits, whereas 'hardcore' is a generic term. If your spec names 6F2, order 6F2 and we'll supply the supporting data.

Can 6F2 be used as a sub-base?

No — 6F2 is a capping material. For sub-base use MOT Type 1 to Clause 803, or recycled Type 1 where secondary aggregate is permitted.

Other bedding and capping sizes

Pipe Bedding 4/10 mm Pipe Bedding 10 mm Pipe Bedding 4/14 mm Pipe Bedding 14 mm Pipe Bedding 4/20 mm Pipe Bedding 20 mm All aggregates

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