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MOT Type 1 sub-base explained

MOT Type 1 sub-base explained

By the Plankley team · Last checked 19 October 2026

Work it out: the mot type 1 calculator shows the sum for your own measurements, with every figure editable.

Worked example: Order: 5 bulk bags.

Open the mot type 1 calculator

Safety: A quantity and geometry estimate, not a design. It's not a substitute for a builder, structural engineer or building control. For anything load-bearing, retaining, on a boundary or that people walk on or lean against, get professional advice and check Building Regulations and planning rules.

On this page

What it is (sourced to the spec)
Compaction
Ordering by weight

What it is (sourced to the spec)

Compaction

Ordering by weight

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