Bricklaying
October 26, 2026 · 9 min read
Bricklaying
Bricklaying guides.
Mortar, bonds and walls that stay standing.
Mortar mix ratiosWhen to use 3:1 or 4:1, and why it matters.
How to lay bricksThe core technique, step by step.
Brickwork lintelsTypes, bearings and what to check.Mortar and pointing
Openings and cavity walls
Brickwork problems
Calculators.
Free bricklaying calculators with textbook equations and the working shown.
Questions.
What size is a standard UK brick?
A standard UK brick is 215mm x 102.5mm x 65mm. With a 10mm mortar joint, that gives a co-ordinating size of 225mm x 112.5mm x 75mm.
How many bricks are there in a square metre?
About 60 bricks per square metre for a single-skin (half-brick) wall laid in stretcher bond with 10mm joints. Add a few percent for cuts and breakages.
What mortar mix should I use for bricklaying?
A 4:1 building sand to cement mix suits most general brickwork. A stronger 3:1 mix is used where extra strength and durability matter, such as below damp-proof course level or in very exposed walls.
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