Pipe Bedding 20 mm delivered in Watford
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 Watford and across Hertfordshire 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 WD postcodes, with timed windows for town-centre and permit-controlled loading bays. Grab, HIAB, tipper and bulk-bag options depending on access.
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 Watford sites
- Deep trench pipe surround
- Soakaway and attenuation stone
- Free-draining backfill behind retaining structures
- Filter layers under geotextile-wrapped drainage
Most Watford jobs are constrained: narrow residential streets, permit-controlled town-centre loading and basement or rear-garden access. Grab lorries, HIAB offload and bulk bags do the heavy lifting, and two-way loads keep vehicle movements down. On the M1/M25 fringe it opens up to full tipper and artic loads.
What shapes Pipe Bedding 20 mm supply in Watford
Drainage packages on constrained residential work plus open M1/M25 fringe sites around Watford 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. Narrow residential streets, permit-controlled town-centre loading and rear-garden access decide whether it arrives by tipper, grab or bulk bag. Where the same site is also producing arisings that leave by grab so two-way loads keep vehicle movements down, we plan the removal and the delivery together so the lorry is not running one leg empty. The same routes serve St Albans, Hemel Hempstead and Rickmansworth.
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.
Can you deliver to narrow residential streets in Watford?
Yes. Grab lorries, HIAB offload and 850kg bulk bags cover sites where an 8-wheel tipper cannot discharge — tell us the access when you enquire.
Material out as well as in, around Watford
Most deliveries into Watford 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 Watford?
Send us the tonnage, postcode and access — quote back within one working day.