Made in the UK from 100% recycled polypropylene
Made in the UK from 100% recycled polypropylene
Answer a few questions to generate a referenced recommendation. Final build-ups remain subject to site conditions and technical approval.
How it works
Answer the questions about your area, the finish and the traffic, and the configurator returns an indicative schedule in the same terms the installation guide uses. The panel count comes straight from the geometry: nine 330 × 330 mm panels to the square metre, so your area multiplied by nine, plus a contingency for cuts around edges and obstructions. The gravel quantity comes from the panel’s 93% open, 40 mm-deep cells — roughly 0.04 m³ of 10–20 mm angular stone per square metre, filled flush and slightly overfilled. The build-up line follows the published guidance for the traffic you describe: sub-base depth, geotextile where separation is needed, bedding where specified, and edge restraint around the perimeter.
Everything the schedule suggests is referenced back to the figures this site publishes — nothing in it comes from anywhere else.
What it cannot know is the site. Ground conditions — soft, wet, made-up or simply variable — change the sub-base more than any other input. A steep fall changes the drainage design. Regular HGV use, caravan corner-stays or skip lorries change the load case entirely, and the route rainwater takes to a lawful outfall is a site question no calculator can settle. Treat the output as a starting specification rather than a design: the technical team reviews schedules that come through, and the installation guide’s approval points list the situations that always need human review before materials are ordered.
A worked example shows the arithmetic. A 36 m² two-car driveway: 36 × 9 = 324 panels, plus perhaps 30 for cuts — 354 panels in total. Gravel: 36 × 0.04 = 1.44 m³, plus overfill — order 1.7 m³ to be sure. And for regular car traffic the guidance line reads a 150 mm compacted MOT Type 1 or Type 3 sub-base with edge restraint throughout. If the same drive will also take a weekly delivery lorry, the sub-base line changes first — which is exactly the input the technical review exists to size.
After the schedule
The schedule the configurator returns is a starting point with a paper trail: panel counts from the geometry, gravel from the open-cell volume, and a build-up line taken from the published guidance for the traffic you described. Everything it reports is referenced back to the figures this site publishes, so a builder or a designer can check each line against the source.
If the project is a standard one, that schedule is often all that is needed. If the ground is unusual, the load heavier than the guidance assumes, or the drainage tied to a specific authority, send the schedule to the technical team with the site details and they will confirm or correct it in writing. A reviewed schedule is a specification; an unreviewed one is a good first draft.
