50 × 50 cm slabs cover a surface fast: you need 4 slabs per m² without joints, or 80 slabs for a 20 m² patio. That makes them popular for patios and terraces with a clean, modern look.
Laying patterns for square slabs
Square slabs can go in stack bond, running bond or on the diagonal. Stack bond gives continuous joints in both directions, so it needs accurate work: any error shows along the whole line. Running bond breaks up the grid and hides small deviations. The diagonal looks lively but cuts every edge slab at an angle.
Load class
This page opens with the Drivable class, which uses a 30 cm base. For a patio, switch to Pedestrian and the base drops to 20 cm. Large slabs crack more easily under car wheels than small pavers, so driveways usually get smaller, thicker pavers.
Avoiding costly cuts
Every cut slab is expensive, and a small offcut is often waste. Plan the patio size around full slabs: with a 3 mm joint, each slab takes up 50.3 cm. The optimizer tests area changes within 5% and different joint widths and shows how many cuts each option needs.
FAQ
How many 50 × 50 slabs do I need for 20 m²?
80 slabs without joints or waste. Add a waste allowance in the planner, and the shopping list includes it.
Can I use 40 × 40 or 60 × 60 slabs?
Yes. The planner has a 40 × 40 cm exposed aggregate slab preset, and Custom dimensions takes any other size.