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Wall
Mortar
Walls above the damp-proof course. A standard door takes about 1.7 m² off the wall.Bricks
2,945
incl. 5%
Cement
8
bags, mortar
Sand
2
m³ building sand
- Wall area
- 27 m²
- Bricks per m²
- 103.9
- Mortar
- 1.53 m³
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How it’s worked out
- Wall = 10 m × 2.7 m − 0 m² = 27 m²
- One skin = 1 ÷ (0.232 m × 0.083 m) = 51.9 bricks per m², × 2 skins = 103.9
- Bricks = 27 × 103.9 × 1.05 = 2,945
- Mortar = wall volume − brick volume, × 1.3 = 1.53 m³
- Cement = 1.53 × 5 bags = 7.6, rounded up to 8
- Sand = 1.53 × 1.2 = 1.84 m³, ordered as 2 m³
Assumptions
- Standard clay bricks, 222 × 106 × 73 mm, with 10 mm mortar joints.
- A 220 mm wall is two skins side by side with a 10 mm joint between them.
- Class II mortar, per m³: 5 bags of cement and 1.2 m³ of damp building sand (damp sand bulks up).
- A straight wall: corners and piers aren’t counted twice, and brickforce is listed separately.
Waste allowance
- 5% on bricks for breakage and cuts. 30% on mortar for what drops off the trowel.
Ask your engineer to confirm
- Which mortar class goes where: usually class I below the damp-proof course (plastic strip in the wall), class II above.
- Brickforce (wire in the joints) and wall ties for 220 mm walls, and how often.