Guide
How much MOT Type 1 do I need?
Multiply the area by the compacted depth to get cubic metres, then allow about 2.1 to 2.2 tonnes of MOT Type 1 per cubic metre; at 100 mm deep one tonne covers roughly 4.5 square metres.
Written by the SK Trade team. Last reviewed 1 November 2026.
The calculation
- Measure the area in square metres.
- Choose the compacted depth in metres (100 mm is 0.1 m).
- Area × depth = cubic metres.
- Cubic metres × 2.1 = tonnes, plus about 10 percent for compaction and levels.
Example: a 30 m² patio at 100 mm is 3 m³, which is about 6.3 tonnes plus 10 percent, so order around 7 tonnes.
Typical depths
Paths and patios commonly use around 100 mm of compacted sub-base. Domestic driveways often use 150 mm or more. Soft or clay ground and heavier vehicles need more; follow your installer's or the paving manufacturer's guidance.
Laying it
Lay in layers no thicker than the compactor can handle, typically 50 to 100 mm, and compact each layer with a plate compactor before adding the next.
Drives and planning
In England, paving more than 5 m² of a front garden needs planning permission unless the surface is permeable or water drains to a lawn or border. The Planning Portal explains the rules.
Related products
Related questions
How deep should a driveway sub-base be?
Around 150 mm of compacted MOT Type 1 is common for domestic drives on firm ground; soft ground or heavier vehicles need more. Follow your installer or the paving maker's guidance.
How much ballast for a cubic metre of concrete?
Roughly 2 to 2.2 tonnes of all-in ballast with about 15 bags of cement at a 1:5 mix. Our concrete calculator works out your slab or footing.
Sources
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