Pipe Bedding 20 mm delivered in Southampton
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 Southampton and across South East 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. Tipper and grab loads across Southampton, Portsmouth, Eastleigh and Winchester within 24–72 hours. Artic tonnage for larger earthworks packages by arrangement.
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 Southampton sites
- Deep trench pipe surround
- Soakaway and attenuation stone
- Free-draining backfill behind retaining structures
- Filter layers under geotextile-wrapped drainage
Coastal and port-adjacent sites often need marine-grade shingle and free-draining fill alongside standard civils sub-base, plus reliable disposal routes for made ground.
What shapes Pipe Bedding 20 mm supply in Southampton
Drainage packages on coastal, port-adjacent and civils schemes around Southampton 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. Port and coastal estates with controlled vehicle movements decide whether it arrives by tipper, grab or bulk bag. Where the same site is also producing made ground needing a reliable, pre-confirmed disposal route, we plan the removal and the delivery together so the lorry is not running one leg empty. The same routes serve Portsmouth, Eastleigh and Winchester.
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 the Isle of Wight?
Mainland Hampshire is standard coverage; Island deliveries are quoted case by case including ferry haulage.
Material out as well as in, around Southampton
Most deliveries into Southampton 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 Southampton?
Send us the tonnage, postcode and access — quote back within one working day.