Pipe Bedding 20 mm delivered in Swindon
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 Swindon and across Wiltshire 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. 24–72 hours on stocked lines across SN postcodes. Bulk artic loads for M4-corridor sites, 8-wheel tippers for estate roads, grab and bulk bags where plot access is tight.
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 Swindon sites
- Deep trench pipe surround
- Soakaway and attenuation stone
- Free-draining backfill behind retaining structures
- Filter layers under geotextile-wrapped drainage
Large flat-site logistics work drives volume Type 1 and capping in artic loads, while the housing releases at Wichelstowe, Tadpole Garden Village and the eastern villages take phased plot-by-plot bedding, sand and topsoil. Clay arisings from the Vale mean classification and muckaway planning matter before earthworks start.
What shapes Pipe Bedding 20 mm supply in Swindon
Drainage packages on logistics platforms and the Wichelstowe and Tadpole housing releases around Swindon 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. Large flat logistics plots taking artic loads, plus phased plot-by-plot housing drops decide whether it arrives by tipper, grab or bulk bag. Where the same site is also producing clay arisings where classification and planning matter before earthworks start, we plan the removal and the delivery together so the lorry is not running one leg empty. The same routes serve Chippenham, Cirencester and Marlborough.
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 cover north Wiltshire and the Cotswold edge?
Yes — Chippenham, Calne, Cirencester, Marlborough and the surrounding villages run on the same Swindon haulage routes.
Material out as well as in, around Swindon
Most deliveries into Swindon 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 Swindon?
Send us the tonnage, postcode and access — quote back within one working day.