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Patio & Slab Quantity Calculator

Slabs, sub-base, bedding mortar and jointing — the full materials list, with realistic Fife-clay-soil wastage built in.

Driveway needs deeper sub-base for vehicle loads.

10% is standard for square layouts; bump to 15% for diagonals or curves.

Slabs needed
62

For 20 m² + 10% wastage

Sub-base
3.2 t

MOT Type 1 hardcore

Bedding mortar
0.9 t

Sharp sand + cement

Jointing
2

25 kg bags, brush-in

Don't skip the sub-base

Cutting the sub-base shallow is the #1 reason patios sink, crack and pool. Fife's heavy clay heaves with frost and shrinks in summer drought — full 100mm compacted MOT is non-negotiable for longevity.

Brush-in resin jointing outlasts mortar pointing on a domestic patio by years. We use it almost exclusively now.

Patio installation

From first dig to brush-in jointing, fully tipped and made good. Send dimensions and a photo.

Discuss your patio