Sub-base | Limestone or Granite

Type 1 Sub Base SWH Clause 803 (Formerly MOT)

Type 1 sub base limestone

Type 1 sub base limestone

We supply Type 1 quarried primary aggregate to the Highway Agency’s Specification. We also supply recycled Type 1 and Type 3.

It is widely used as a sub-base in the construction of roads, car parks and pathways. It’s a well-graded material sized from 63mm to dust, but with most of the material sized at 31.5mm to dust. Available both as a limestone or a granite.

Type 1 SHW Clause 803 (Specification for Highway Works) is often known MOT Type 1 or DOT Type 1.

What is type 1 sub base material?

Sub-base material is produced by crushing either limestone or granite rock. It is used to spread the load on areas which bear heavy traffic, such as roads and pavements.

Type 1 sub base aggregate

Graded Type 1 sub base

The sub base is a load-bearing layer of aggregate laid on the sub-grade layer below and is the main load-carrying layer of roads and pavements. Since the sub base distributes weight over a wide area, it provides a very stable layer which reduces sinking and settling of the highway surface. Because it is comprised of a particles complying to a grading of 63mm solids to dust, the particles form an interlocking mesh with few air spaces in between, providing a very robust structure.

It should be frost-resistant when used within 450mm of the surface.

Often the top surface can be stripped and replaced without needing to reinstall the sub base, providing it is in good enough condition. This can save a lot of time and money.

What is the weight of type 1 sub base per m3?

The weight of Type 1 limestone is 2.2 tonnes per m3 (compacted).

What is the specification for Type 1 sub base?

The specification for type 1 sub base is issued by the UK Highways Agency. To be classified as Type 1, the material must meet the specifications provided by the Highways Agency.

Can Type 1 be used for patios?

Type 1 sub base can be used for patios and driveways. However, please note our minimum order quantities of 10 bulk bags or 10m3.


The prices for type sub base 1 can vary according to the exact mix and quantity and of course the site location. Recycled aggregates are sometimes cheaper than primary aggregates, but it is essential to obtain the correct aggregate for your application. We currently don’t have a type 1 cost calculator available online, but please do contact us for further information.

Where to buy Type 1 near me

We provide a service which can deliver throughout the whole of the UK. Prices will vary according to your location.

Delivery options

We deliver in the loose or via industry standard bulk bags. We use a range of transport methods across the UK which can be tailored to meet your specific requirements.

We have a minimum order level of 10 bulk bags or 10 m3. If you require less than this, please ring on 020 8546 3860.

Deliveries of loose materials can be via:

  • 8, 6 and 4 wheel tipper lorries. 8-wheel tipper trucks can carry approximately 20 tonnes or 13-14 cubic metres.
  • 8, 6 and 4 wheel grab lorries
  • artics (dependent upon your site constraints)
  • walking floor (dependent upon your site constraints)

Recycled type 1

We are also pleased to supply recycled type 1 sub base. See our separate page.

About Us

We have a nationwide network and our headquarters is based in London. We are committed to providing solutions to all your aggregate, topsoils, muckaway and landscaping projects. For the groundworker and construction sectors we deliver aggregates,  recycled aggregates, skips and roll-on roll-offs, as well as traditional muck away and site clearance services.  We aim to provide a one-stop shop for all hazardous, inert or non-hazardous waste removal and disposal.

We are members of BALI (the British Association of Landscape Industries) and MPA (Mineral Products Association).

BALI logoMPA logo

Get in touch. 020 8546 3860.