MOT Type 1 Sub Base - 25kg Bag - 10 Pack
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Product Information
Full details
MOT Type 1 Sub Base is a high-performance, granular aggregate ideal for both professional contractors and DIY enthusiasts who require a stable foundation for hardscaping projects. Engineered with a blend of crushed granite and limestone, it provides exceptional load-bearing support for driveways, patios, and pedestrian walkways. While it offers superior structural integrity, users should note that the heavy nature of the material requires careful planning regarding the physical volume needed for large-scale landscaping.
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Extended Product Information
FAQs
Can I use MOT Type 1 for a driveway?
Yes, it is the standard and recommended choice for driveway sub-bases due to its excellent load-bearing capacity.
Do I need to mix this with anything?
No, MOT Type 1 is a pre-mixed, ready-to-use aggregate. Simply pour, spread, and compact.
How thick should the sub-base layer be?
For driveways, a minimum depth of 100mm to 150mm is generally recommended depending on local ground conditions.
Is this suitable for a top-layer finish?
No, this is a structural sub-base and should be covered with paving, gravel, or another suitable surfacing material.
How many bags do I need?
Calculate the volume of your area (length x width x depth) and convert to tonnage; each bag weighs 25kg, so plan accordingly for the total required weight.
Troubleshooting
Surface is uneven after laying
Ensure that the sub-grade was leveled correctly before application and use a plate compactor to achieve consistent density.
Base feels 'spongy' after compaction
Check that you have not laid the material too thick in a single pass; compact in thinner layers (max 100mm) for better results.
Pros and Cons
Pros
- Excellent compaction properties for a stable finish
- High structural integrity for heavy traffic areas
- Easy to manage 25kg bag size reduces physical strain
- Suitable for a wide range of outdoor construction projects
- Consistent quality across all bags
Cons
- Requires manual labor for spreading and compaction
- Not intended for use as a decorative top layer
- Can be dusty during the application process
- May require mechanical compaction for larger driveways
Setup, Compatibility & Care
To prepare the site, clear the area of vegetation and topsoil until you reach a firm sub-grade. It is recommended to use a geotextile membrane beneath the MOT Type 1 layer to prevent weeds and help keep the aggregate from sinking into soft earth. While the product is weather-resistant and requires no specific maintenance once installed, ensure your project site has adequate drainage, as water pooling can compromise any base over time. For best results, use a vibrating plate compactor to "lock" the fine dust and crushed rock together, creating a finished surface that is ready to accept paving or gravel finishing.