Last Modified: January 30, 2024

MOT Type 2 Sub-Base

A Finer Grade For Base Construction

Close up of mot type 2

By Ben Parrot - Landscape Gardener & Amateur Geologist


Stone landscaping material and construction aggregate

Geological name(s):


Other Name(s):

Sub-base type 2, MOT type 2, type 2 MOT, MOT type 2 sub-base, MOT type 2 subbase, MOT type 2 aggregate, type 2 MOT aggregate, type 2 aggregate, type 2 gravel


Welcome to the only encyclopaedia for decorative aggregates and landscaping materials and our listing about MOT Type 2, also known as MOT type 2 sub-base. The term MOT stands for 'Ministry Of Transport', which is a government agency responsible for overseeing and regulating transportation in many countries. This product should comply with the Department of Transport Specification for Highway Works, clause 804 (SHW 804).

MOT Type 2 is a type of crushed aggregate that is finer than MOT Type 1. It contains more fines and dust than Type 1, making it suitable for creating a more compact and tight-knit base. It is generally used as a sub-base material in construction projects. When compacted, it provides a stable and free-draining base, making it ideal for various applications such as driveways, pathways, walkways and as a backfill material for filling potholes.

This is a comprehensive encyclopaedia listing about MOT type 2, a hardscape and construction aggregate. It details the product's specifications, accompanied by photographs, and outlines its benefits, applications, and incompatibilities as a landscaping material. Additionally, this entry serves as a gateway to a wealth of DIY resources, with a list of comparable alternatives, articles offering design inspiration and fundamental principles, and a collection of straightforward, step-by-step instructions for constructing your own hardscaping features.






fall safety





fish friendly

eco friendly



diy friendly




Commonly derived from granite, limestone or recycled materials.


Grey but can be other shades.



Type 2 close up

Size Range


Up to 1.6"

Fall Safety

Unsuitable for play surfaces





Fish Friendly


Mot type 2 25mm to dust






Neutral or alkaline



Close up of mot 2


MOT Type 2 provides a durable, low-maintenance solution that improves drainage, prevents erosion, and offers a stable base for various structures. It possesses exceptional load-bearing capabilities and compaction properties, making it an ideal sub-base for roads, driveways, and other areas subjected to heavy usage. Its angular shape not only ensures solid interlock and stability but also contributes to effective water drainage, preventing waterlogging and structural damage.

  • Improves drainage
  • Hard-wearing
  • Eco-friendly, sustainable
  • Low-maintenance
  • Moisture retention
  • pH alkaline or neutral
  • Heavy load bearing
  • Sub-base
  • Easy to lay


MOT Type 2  products are predominantly used in construction and landscaping as a sub-base layer. Its robust structure makes it ideal for supporting heavy loads. Thus, it's commonly found beneath highways, car parks, and driveways. This aggregate's ability to provide a stable, level foundation makes it indispensable for creating solid, long-lasting surfaces. MOT Type 2 is typically used in applications where a more substantial base layer is required. It is often used in the construction of heavy-duty industrial yards or areas with heavy foot traffic.

In the following section, we list common MOT type 2 sub-base uses. Wherever there is a hyperlink beside an item, an article from Outdoor Aggregates about the topic is available.

Brick pavers patio

Inspiration and Informational Articles

  • MOT type 2 sub-base
  • Landscaping with MOT type 1
  • Sub-base for driveways
  • MOT type 1 pathways

DIY-Friendly How-To Guides

  • How to lay a MOT sub-base 

Need to work out how many stone chippings your  project needs? Try our free gravel calculator.

Unsuitable For

The following list represents the kinds of applications that MOT type 2 sub-base may not be suitable for:

  1. 1
    Areas with fine plantings: If you have creepers or low-growing plants in your garden gravel can make it harder for these plants to thrive, as it may interfere with their root systems as they try to grow.
  2. 2
    Play surfaces
Crushed aggregate road in wicklow ireland

Similar Alternatives to MOT Type 2 Sub-Base

The following is a list of decorative aggregates which are alternatives to MOT type 2 sub-base. They may offer you a more suitable variation on the primary colour, a more economical option, or a close substitute for cases where the base material may be unsuitable for the project you are creating, e.g. limestone is not fish-friendly, where basalt is.










0-50mm (0.4-2")





0-63mm (0.4-2.6")



MOT type 1 scalpings



0-50mm (0.4-2")



Crushed concrete



0-50mm (0.4-2")








Under £80







Excavated driveway

Sub-base generally won't require maintenance unless it requires major repairs.

Purchasing Tips

Gravel road through farm land in ireland

When you're buying MOT Type 2 for your landscaping project, it's crucial to consider the quality and source. You should only seek out certified materials that meet the necessary standards. Don't hesitate to request compliance documents, as it's important to be aware of the possibility of contamination, which could lead to significant issues in the future.

When looking for recycled options, it's important to ensure that they have the required structural integrity. It's always a good idea to compare prices from multiple suppliers of MOT Type 2 and ensure that the delivery options and costs are suitable for your site. Timing of delivery should be taken into consideration to avoid any delays and storage issues. Choosing the right type of MOT Type 2 will guarantee a successful and long-lasting outcome for your landscaping project.

Our MOT calculator is a tool that can provide you with a quick and impartial estimate for the material requirements of your project based on the measurement of the space. This is one of the most efficient and easiest ways to ensure that you order the correct amount of material, avoiding shortages or overspending. Ordering a MOT type 2 bulk bag or loose loads often provides better value than buying smaller quantities; therefore, accurate calculations are crucial for saving both time and money. Additionally, it is important to consider the delivery logistics, such as vehicle access to the site.


What is MOT type 2?

MOT Type 2 is a crushed aggregate commonly used as a sub-base for roadworks, driveways, and other structural applications, known for its finer particles and load-bearing properties.

How is type 2 MOT used in construction?

Type 2 MOT is used as a foundational layer in construction, providing stability and support for surfaces like roads, driveways, and parking lots due to its excellent compaction and strength.

Can MOT type 2 be used for driveways?

Yes, MOT type 2's robust nature makes it an ideal choice for creating a stable, durable foundation for driveways.

Is type 2 MOT suitable for paving projects?

While type 2 MOT is not typically used as a top layer for paving, it's a valuable sub-base, providing the necessary stability and support for the paving materials.

What are the benefits of using MOT Type 2?

Its primary benefits include high load-bearing capacity, excellent drainage properties, durability, and providing a stable base for various types of construction and landscaping projects.

MOT type 1 vs type 2?

MOT Type 2 has smaller, more compact particles, making it better for a smooth finish, whereas Type 1 is larger and more angular, making it ideal for support and drainage.

Is the right aggregate MOT type 1 or 2 for driveway?

For most driveways, MOT Type 1 is preferred as a sub-base due to its superior drainage qualities.

There are many wonderful types of gravel and aggregates available for your project needs. Check them out!

About the author 

Ben Parrot is a landscape gardener and amateur geologist. He is the founder of Outdoor Aggregates, with the mission to create the first encyclopaedia for decorative aggregates. From natural stone through to decorative bark, these aggregates are critical to garden and landscape design, universally.

The problem: There isn't any place where all the different types of decorative landscaping materials and construction aggregates can be found, nor are the specifications of each type readily available. So, enriched by his extensive experience, and inspired by the timeless elegance and raw beauty of stone and rock, etched by nature's artistry over millennia, Outdoor Aggregates was born.