Patio & Paving Material Calculator
Enter the size of your patio and we'll work out the slabs, sub-base, sand, cement and jointing you need, ready to order from DBM.
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How the patio goes together
1. Set out with a fall
Mark the area with a slight slope running away from the house, so rainwater drains off rather than towards the wall.
2. Dig out and lay the sub-base
Dig out around 150mm, then lay and firm up your MOT Type 1 hardcore to about 100mm.
3. Lay the slabs
Lay each slab on a full bed of mortar (roughly four parts sharp sand to one part cement), tap it down level, and leave a small joint between slabs.
4. Point the joints
Let the bed set for a day, then fill the joints with mortar or a brush-in jointing compound.
Quantities are a guide based on standard coverages and include your chosen wastage. Sub-base and mortar can vary with ground conditions and how level the base is, so it's worth ordering a little over. Pop into any DBM branch and we'll help you finalise the order.
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