MOT Type 1 Sub Base - 25kg Bag - Pack Of 5

MOT Type 1 Sub Base aggregate supplied as five 25kg bags for a total weight of 125kg. This crushed...

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- Mot Type 1 Sub Base 25Kg Bag Pack Of 250Kg TotalCrushed Aggregate For Driveways Patios Paths Paving

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B&Q - Mot Type 1 Sub Base 25Kg Bag Pack Of 250Kg TotalCrushed Aggregate For Driveways Patios Paths Paving

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The RangeMOT Type 1 Sub Base 25kg Bag Pack of 5 - Neutral

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Product Information

Full details

The MOT Type 1 Sub Base is designed for DIY enthusiasts and contractors requiring a reliable, compactable foundation for small-scale landscaping projects like garden paths, patio bases, and minor driveway repairs. It offers superior stability for paving and slab projects due to its specific crushed grading, though users should be aware that because it is a natural product, variations in color and aggregate size may occur between batches.

All features

Model Part Number	1386485
Brand	B&Q

Extended Product Information

FAQs

How deep should I lay the MOT Type 1?

For pedestrian paths, 100mm is typically recommended. For light residential driveways, 150mm to 200mm is standard.

Can I use this for a heavy driveway?

MOT Type 1 is industry standard for driveways, but ensure you achieve a minimum 150mm depth and follow correct sub-grade preparation.

Do I need a compactor?

Yes, for the best structural results, a mechanical plate compactor is highly recommended over manual hand tamping.

Will the color be consistent?

As this is a natural quarried product, the color and grading may vary slightly between bags or batches.

Is this the same as 'Scalpings'?

MOT Type 1 is a specific graded mix designed for load-bearing compaction; generic 'scalpings' may lack the consistent grading required for a stable base.

Troubleshooting

The surface feels 'spongy' after installation

This is often due to poor compaction or placing layers that are too thick. Remove the material, re-level the subgrade, and compact in thinner, 50mm layers.

Water pooling on the sub-base

Ensure you have established a slight gradient (fall) away from buildings or structures during the initial leveling process to allow for natural drainage.

Pros and Cons

Pros

Easy to transport thanks to the 25kg individual bag size
Provides a rock-solid foundation for various paving projects
Excellent for tight spaces or areas where heavy machinery cannot reach
Reduces the risk of future sinking or cracking in finished surfaces

Cons

Not suitable for heavy-duty load-bearing projects like major road construction
Natural material variation means it may not match existing surfaces exactly
Physical effort is required for manual compaction on smaller jobs
Limited coverage; larger driveways may require the larger 30-bag pack alternative

Setup, Compatibility & Care

Preparation: Clear the site of topsoil, vegetation, and debris. Ensure the subgrade is level and firm.
Depth Requirements: For residential paths, a 100mm depth is usually sufficient. For light driveways, aim for 150mm to 200mm of compacted material.
Compatibility: This sub-base is compatible with sand bedding layers for block paving and mortar beds for natural stone or concrete slabs.
Storage: Keep bags in a dry, covered area to prevent excess moisture from making the bags heavy or causing the aggregate to bind prematurely.
Safety: Always wear appropriate personal protective equipment, including safety boots and gloves, as crushed rock can have sharp edges.