Pipe Bedding 20 mm delivered in London
20 mm single size is a clean, high-void stone used for deep trench surround, soakaways and attenuation layers. With no fines it drains freely and does not slump into voids, so it is the default where the surround also has to store or convey water.
Into London and across Greater London we supply it loose by tipper, by grab lorry where a stockpile has to be loaded or reached over a boundary, or in bulk bags for plots a lorry can't discharge into. Same-week dispatch on stocked lines to all 32 boroughs and the City, with most orders on site within 24–72 hours. Tipper, grab, HIAB and bulk-bag options for restricted-access sites in Zones 1–2, plus night and weekend windows where daytime access is not practical.
Specification
- Nominal size
- 20 mm single size
- Grading
- Clean, washed, fines removed
- Material
- Primary crushed rock or washed gravel
- Void ratio
- Typically around 30% — attenuation duty
- Supply formats
- Loose tipper, grab lorry, artic, bulk bag
- Typical load
- 16–20 t tipper, 28–29 t artic
Lead time
Stocked line — most postcodes in England and Wales are dispatched within 24–72 hours of order confirmation. Scotland and Highland deliveries are typically 3–5 working days. Programmed civils schedules are booked in advance and delivered to your call-off dates.
Typical uses on London sites
- Deep trench pipe surround
- Soakaway and attenuation stone
- Free-draining backfill behind retaining structures
- Filter layers under geotextile-wrapped drainage
London demands a supplier that understands logistics as well as materials. Most central drops are timed to 30-minute windows with grab or HIAB access, and our hauliers operate FORS Silver, ULEZ and DVS-compliant vehicles for schemes that require compliant transport. Muckaway is the other half of the job here — constrained sites need muck off before stone can come on.
What shapes Pipe Bedding 20 mm supply in London
Drainage packages on basement digs, borough highway packages and public-realm schemes around London take Pipe Bedding 20 mm in daily call-offs rather than one bulk drop, so bedding lands as each run is dug rather than sitting in the way. Timed 30-minute delivery windows, ULEZ and DVS-compliant vehicles and single-lane mews accesses decide whether it arrives by tipper, grab or bulk bag. Where the same site is also producing clay and made ground that usually needs classifying before a disposal route can be booked, we plan the removal and the delivery together so the lorry is not running one leg empty. The same routes serve Croydon, Watford and Romford.
Questions we get asked
What void ratio should I design a 20 mm stone soakaway to?
Clean 20 mm single size is commonly designed at around 30% void ratio, but your drainage engineer should confirm the figure for the material and compaction assumed in the calculation.
Is 20 mm single size the same as 20 mm ballast?
No. Ballast is an all-in mix of stone and sand for concrete. 20 mm single size is a washed, clean stone with the fines removed and is not a concreting material.
Do you deliver inside the Congestion Charge zone?
Yes — we run ULEZ and DVS-compliant vehicles and coordinate Zone 1 drops around the 07:00–22:00 charging window, or schedule night deliveries for low-disruption sites.
Material out as well as in, around London
Most deliveries into London pair with a removal: the lorry takes your arisings to a licensed facility and comes back loaded, so you pay for one movement rather than two.
Need pipe bedding 20 mm in London?
Send us the tonnage, postcode and access — quote back within one working day.