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Project calculators

Quick sums so you buy enough and not too much. We can check your numbers in store before you pay.

Paint a room

0L

Shop PVA paint

Based on 8 m² per litre per coat, typical for PVA on smooth plaster. Rough or new plaster takes more.

Roof & waterproofing

0L

Shop roof paint Waterproofing

Roof paint: about 4 m² per litre per coat. Waterproofing over membrane: about 1 m² per litre per coat. Check the label.

Pool volume

0L

Shop pool care

Bring us a water sample before you dose: we’ll tell you what the pool needs.

Concrete slab

0bags

Call us to check stock

About 25 MPa: 7 bags of cement and 0.65 m³ each of river sand and 19 mm stone per m³, plus 5% extra.

These are rules of thumb. Always check the coverage on the product label, and ask us in store if you are unsure.