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What is MOT Type 1 Sub-Base used for?

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When it comes to construction and landscaping projects, MOT Type 1 is a name that frequently comes up. But what exactly is MOT Type 1, and why is it so essential? Let's dive into the details. 


  
What is MOT Type 1?

MOT Type 1, also known as DOT Type 1, is a granular sub-base material specified by the Department of Transport (DOT). It’s the most widely used approved sub-base in the construction industry. To qualify as MOT Type 1, the aggregate must comply with the Department of Transport Specification for Highway Works, clause 803 (SHW 803). This ensures the material meets the highest standards for load-bearing and compaction. 


  
Composition of MOT Type 1

MOT Type 1 is typically composed of crushed granite, limestone, basalt, or gritstone. The aggregate is crushed to sizes ranging from 40mm down to dust, creating a blend that is easy to compact and offers excellent load-bearing qualities. It can also be made from clean crushed concrete. This mix of particle sizes helps to create a dense, stable sub-base once compacted. 


  
Uses of MOT Type 1

MOT Type 1 is incredibly versatile and is used for a variety of applications, including: 
  
- Road Construction: As a base layer for roads, it provides a stable foundation for asphalt or concrete layers. 


- Driveways and Patios: Ideal for constructing driveways and patios, ensuring a solid, level foundation that can support the weight of vehicles and foot traffic. 


- Paths and Walkways: Provides a stable base for pathways and walkways, helping to prevent sinking and movement over time. 


- Foundations: Used in the foundations of structures like sheds, garages, and extensions to ensure a firm and even base. 


- Drainage Solutions: Suitable for drainage applications, including under permeable paving systems and around drainage pipes. 


  
Why Choose MOT Type 1? 

The key benefits of using MOT Type 1 include its durability, ease of compaction, and cost-effectiveness. This makes these quarried aggregates a go-to choice for many construction and landscaping projects. 
  
- Certified Quality: Must comply with the Department of Transport Specification for Highway Works, ensuring top quality. 


- Excellent Load-Bearing Qualities: Ideal for highly trafficked areas such as highways, car parks, and footpaths. 


- Versatile Applications: Perfect for various sub-base applications including roads, driveways, patios, and building bases. 


 
Is MOT Type 1 suitable for a driveway sub-base? 

Yes, MOT Type 1 is perfect for driveway sub-bases, especially when the finished surface is gravel or tarmac. For block-paved driveways, consider MOT Type 3 to comply with Sustainable Urban Drainage regulations (SUDS). 

At Mainland Aggregates Ltd, we take pride in being one of the leading suppliers of MOT Type 1 Sub-Base. We offer this essential product in bulk bags or loose by the tonne, ensuring you get the right quantity for your project. Our network of suppliers and hauliers throughout the UK allows us to deliver competitively priced, high-quality materials right to your door. 
    
Choose MOT Type 1 for your next project and ensure a stable, reliable foundation. Contact Mainland Aggregates today to place your order and get expert advice on all your aggregate needs. 

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