Sub Base & Hardcore

At Willis & Ainsworth we pride ourselves in supplying all types of Sub Base and Hardcore materials for any job. We have access to both primary sub-base such as Limestone and Granite based materials and Recycled materials such as crushed concrete (6F5) or Type 1 Recycled. 

Primary vs. Recycled

There is always the question of Primary Sub Base vs. Recycled Hardcore.

Some differences should be mentioned in the product description but the main point for most products is the price. This has the most impact on larger 20 tonne loads or big jobs that need 100s-1000s of tonnes. We would suggest sticking to primary materials or the material specified by the surveyor, unless you or your groundworker / builder really know what to expect with Recycled products. Every producer has different standards when producing recycled materials and only products that are tested comply to a certain standard.

Sustainable Urban Drainage Systems (SUDS)

Materials that comply to "SUDS" are a more recent product within the aggregate industry. These are the materials that conform to Marshalls, Formpave, AquaPave and AquaSlab paving solutions laying guidleines. There is also MOT Type 3 (DOT or MOT type 1 X) this material is what is the suggested base material to all new drives. We also offer 2-6mm & 20-4mm limestone for laying these paving slabs.

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  • Railway Track Ballast

    Rail (Track) Ballast

    Track Ballast is used for railways. It's both above and underneath railroad ties to secure the ground and stop the tracks from moving under the weight of the trains. It is also used as a weed suppressant to help stop unwanted vegetation growing through...
  • Scalpings

    40mm Scalpings

    Scalpings is a 40mm down to dust limestone or granite material. It can often be confused with MOT Type 1. 40mm Scalps, it doesn't have to conform to any testing and therefore scalpings tend to be stonier or "dustier" than Type 1. It is generally used...
  • MOT Type 3

    MOT Type 3

    Type 3 is a crushed granite or limestone sub-base product similar to Type 1 but with reduced fines to allow water to free drain as a permeable sub base. This material is screened as a blended 0/50mm. This material is used with SUDS (Sustainable Urban...
  • Type 1 Recycled Hardcore

    Type 1 Recycled Hardcore

    Type 1 Recycled is a mixture of 40mm crushed concrete including; concrete brick and tarmac. Type 1 Recycled sub base is one of the few tested recycled materials. It it tested in compliance for the Ministry of Transport specification clause SHW 803,...
  • 6F5 Recycled Crushed Concrete

    6F5 Recycled Crushed Concrete

    6F5 recycled is a 80mm-0mm crush and run recycled material consisting of bricks, concrete and occasionally asphalt. 6F5 recycled is used for sub bases, temporary haul roads or building up levels. It can sometimes be referred to as 6F2 although this is...
  • 0-4mm Dust

    0-4mm Limestone Dust

    0-4mm Limestone dust is an excellent binding dust and is often used to help bind 40mm Scalpings or MOT Type 1 together if they are slightly stonier than required or have been down for a long time and the dust has washed away. It is sometimes used under...
  • 2-6mm Chippings

    2-6mm Limestone Chippings

      2-6mm Limestone chippings are used in SUDS (Sustainable Urban Drainage System). This is used as a substitute for sharp sand due to its free draining ability. It is also known as priora and aquaflow chippings and is one of the suggested laying...
  • 4-20mm Chippings

    4-20mm Limestone Chippings

      20mm limestone Chippings are used in SUDS (Sustainable Urban Drainage Solution). This can be used as a crunch layer underneath the 2-6mm Limestone Chippings when laying a permeable paving or needing to conform to SUDS. Also known as Priora...
  • 63-10mm Chippings

    63-10mm Limestone Chippings

      63-10mm Limestone angular chippings are used in SUDS (Sustainable Urban Drainage System). This is used as a base product due to its free draining ability, it is put down before the 2-6mm chippings. It is also known as priora or aquaflow base stone...
  • 80-40mm Crushed No Fines Willis & Ainsworth Ltd

    80-40mm Crushed No Fines

      80-40mm crushed no fines is an alternative to 40mm, rejects or oversized drainage materials. It is commonly used for drainage but can be used as a free draining sub base. Due to its shape and sizing it drains water very well but it also knits...
  • 40mm Recycled Shingle

    40mm Recycled Shingle

      40mm Recycled Shingle is made from crushed concrete, brick and reclaimed gravel. The material is usually angular due do it being crushed and screened during the recycling process. Like "rejects" it is very good for drainage and is ideal for use in...
  • 20mm Recycled Shingle Willis & Ainsworth Ltd

    20mm Recycled Shingle

      20mm Recycled Shingle is made from crushed concrete, brick and reclaimed gravel. Unlike 20mm Primary Gravel(s), Recycled Gravel is not a decorative material and we do not suggest laying it on a driveway as a decorative shingle or stone. It is...
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