What does the British Standard say?
Block paving design in the UK follows the BS 7533 series. Private drives, paths and patios fall in the lightest traffic category, which allows a 50 mm minimum block. Adopted roads and forecourts need thicker blocks.
Why the base matters more than the block
A 60 mm block on a thin, uncompacted base will still sink. The sub-base (usually at least 150 mm of compacted MOT Type 1 for a drive) spreads the load; the blocks mainly need to resist cracking and turning.
When to choose thicker blocks
- Vans, pick-ups or motorhomes parked on the drive
- Tight turning in a small space
- Delivery lorries or skips likely to stand on it
- Permeable systems, where design guides call for 60 to 80 mm
More questions
Is 50 mm block paving strong enough for a car?
Yes, on a properly built and compacted base, laid in herringbone with fixed edges.
Is thicker block paving more expensive?
Slightly, per square metre of blocks. It makes less difference to the total than the dig and sub-base do.
Written by the Block Paving Contractors survey team
Reviewed 9 November 2026. Sources include the BS 7533 series, Interpave and manufacturer laying guidance, GOV.UK, gov.wales, gov.scot and nidirect planning guidance, and the Consumer Contracts Regulations 2013.
Reviewed 9 November 2026. Sources include the BS 7533 series, Interpave and manufacturer laying guidance, GOV.UK, gov.wales, gov.scot and nidirect planning guidance, and the Consumer Contracts Regulations 2013.
