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2 days agoA contractor's guide to brick strength grades and UK building standards - London Business News | Londonlovesbusiness.com
Compressive strength, measured in N/mm², gauges how much load a brick can bear before crushing. In the UK, BS EN 771-1 requires manufacturers to declare this measurement, with engineering bricks referenced in the National Annex. Typical clay facing bricks range from 9 to 20 N/mm², while engineering bricks can reach up to ≥75 N/mm² (Class B) or ≥125 N/mm² (Class A). The NHBC suggests that you have a minimum of 9 N/mm² for one- or two-story buildings and 13 N/mm² for three-storey buildings.