Engineering bricks

Engineering bricks

Engineering bricks are a type of brick used where strength, 

low water porosity or acid flue gas 

resistance are needed. Engineering bricks can be used for 

damp-proof courses

Clay engineering bricks are defined in British Standard BS 

6100 "Glossary of building and civil 

engineering terms" as "brick sized fired clay units having a 

dense and strong semi vitreous body 

conforming to defined limits for water absorption and 

compressive strength"

Stronger and less porous engineering bricks (UK Class A) 

are usually blue due to the higher firing 

temperature whilst class B bricks are usually red. Class A 

bricks have a strength of 125N/mm² and 

water absorption of less than 4.5%; Class B bricks have a 

strength greater than 75N/mm² and water 

absorption of less than 7%

Accrington brick is one type of engineering brick

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