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Last edited 23 Sep 2018
A mason is a person who builds with, or dresses, hard units such as brick, stone or block. The term ‘masonry’ can be used to describe the trade of masons, work done by them, or the actual, stonework, brickwork or blockwork that they construct.
Masonry is generally used to form the walls and other solid elements of buildings and structures such as bridges, tunnels and so on. It may be load bearing, forming an integral part of the structure, or non-load bearing, such as a partition wall or cladding.
Generally the size of the units is suitable for being laid by one person, although, increasingly, masonry is delivered to site in prefabricated panels that are craned into position. Masonry is often formed by laying a number of interlocking units, bound together by mortar, however, dry set masonry relies on the friction between the units to prevent movement, and does not require mortar.
Masonry is very strong in compression, but less effective at resisting lateral loading or tension forces. Additional strength can be achieved by increasing the thickness of the masonry, by the addition of piers or buttresses, or by the incorporation of reinforcement.
Masonry walls may have complex constructions to optimise performance, that may include hollow sections in the masonry itself, a cavity between internal and external leaves of the wall, insulation, a vapour barrier and internal and external finishes and decoration.
However, generally masonry does not require finishing and decorating and is very durable, so is relatively inexpensive to maintain and repair. It tends to offer good thermal mass, high acoustic insulation and good resistance to fire.
To find out about the cleaning of masonry, see How to clean masonry.
NBS categorise masonry as:
|F10||Brick / Block walling|
|F11||Glass block walling|
|F20||Natural stone rubble walling|
|F21||Natural stone / ashlar walling / dressings|
|F22||Cast stone ashlar walling / dressings|
|F30||Accessories / Sundry items for brick / block / stone walling|
|F31||Precast concrete sills / lintels / copings / features|
|F42||Straw bale walling systems|
 Find out more
 Related articles on Designing Buildings Wiki
- Barrel vault.
- Defects in brickwork.
- Defects in stonework.
- Finding stone to conserve historic buildings.
- Flying buttress.
- How to clean masonry.
- Modern stonemasonry.
- Natural stone cladding.
- Parge coat.
- Rubble masonry.
- Solid wall insulation.
- Sourcing stone to repair Exeter Cathedral.
- Stone dressing.
- Types of stone.
- Unfired clay masonry: An introduction to low-impact building materials.
- Weep hole.
 External references
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