Block Paving Calculator
Complete material takeoff for professional UK driveway installations.
Material Takeoff
UK Standard Note:
Driveway block paving should be at least 50mm thick. For heavy vehicles, 60mm blocks are recommended. Ensure your sub-base is compacted with a whacker plate.
Block Paving Guide: Sub-base, Sand & Installation
Professional Driveway Paving
Block paving is one of the most popular choices for UK driveways due to its durability and aesthetic appeal. However, the strength of the driveway is determined entirely by what is underneath the blocks.
A typical installation consists of four layers: Sub-grade (soil), Sub-base (MOT Type 1), Laying Course (Sharp Sand), and the Blocks themselves.
UK Material Checklist
- MOT Type 1 (Sub-base)
- Sharp Sand (Laying Course)
- 200x100mm Blocks
- Kiln-Dried Sand (Jointing)
Understanding SuDS Regulations
Since 2008, UK planning regulations (Sustainable Drainage Systems or SuDS) require that any new driveway over 5m² must be permeable or drain into a soakaway within the property. Standard block paving is usually non-permeable, meaning you must install proper drainage (Aco drains) to remain compliant.
The Laying Course
The laying course should be 30mm to 50mm of Sharp Sand. This is screeded flat and compacted. The blocks are then laid directly onto the sand. Do not use building sand, as it is too soft and will allow the blocks to shift.
Edge Restraints
Edge restraints (usually concrete kerbs or blocks set in a concrete haunch) are vital. Without them, the blocks at the edges will push outwards under the weight of a car, causing the entire driveway to fail.
The Final Step: Kiln Dried Sand
Once the blocks are laid, sweep Kiln Dried Sand into the joints. Use a vibrating plate (whacker) over the blocks to shake the sand into the gaps, then sweep again. This creates the 'bridge' that spreads the load of a vehicle across all the blocks.
Block Paving FAQ
Technical Disclaimer
Estimates are based on standard UK block sizes and average material densities. Site conditions, soil type, and exact block specifications can impact material requirements. For structural installations, always consult a qualified professional.