Brick masonry is a structural element built from bricks and cement mortar. Different qualities of brick are combined with different mortar mixes depending on the architectural design and the loads the wall will carry. The bricks are placed according to a design bond so that they knit together into a wall that can safely withstand the pressure coming from the structure above. The technique is ancient: brick masonry appears in works from the pyramids of Egypt to the Great Wall of China. Once the wall is up, the joints are finished by pointing, and the methods used for pointing brick and stone masonry protect the wall face for decades.
What Is Brick Masonry?
Brick masonry is the process of laying bricks on a mortar bed. The resulting wall is an element of the building structure that safely transfers the load from the superstructure to the foundation. Lime and cement mortar are used in permanent construction, while mud mortar appears in temporary work. A ratio of 1:3, one part cement to three parts sand, is usually used for cement mortar, and water is added at about 70 percent of the weight of the cement.
Mortar and its role
Mortar does three jobs: it bonds the bricks together, it spreads the load evenly across the bed, and it seals the joints against water. The mix controls strength, workability, and durability. A richer mix gains strength faster, while a leaner mix is more forgiving of small movements in the wall.
- Bond bricks into a single structural unit
- Distribute vertical load across the wall section
- Seal joints against wind driven rain
- Allow small adjustments while the bricks are laid
Site practice basics
Good brickwork starts before the first brick is laid. Bricks are sorted, cleaned, and soaked so they do not suck the water out of the mortar too quickly, and mortar is mixed in small batches and used before it stiffens. Site brick masonry work follows a routine of setting lines, checking levels, and keeping the perpend joints plumb.
Cement Mortar Masonry and Brick Classes
Cement brick masonry is laid on a bed of cement mortar and is classified into three grades based on the quality of the brick and the mortar mix. The class chosen for a job should match the importance of the wall and the loads it carries.
First-class brick masonry in 1:4 mortar
First-class brick masonry uses sound, well-burned bricks in a 1:4 cement sand mortar. This mix has high strength and is recommended for:
- Earthquake zones
- Heavyweight and load-bearing walls
- Brick pillars
- Multi-storey buildings
- Brickwork used for drainage
- Partition or 4.5-inch thick walls
Second-class brick masonry
Second-class brick masonry uses second-class bricks in a 1:4 proportion of cement mortar. These bricks are not very regular in shape and have a minimum crushing strength of about 70 kg per square centimetre. Second-class work should not be used for load-bearing walls in two-storey buildings.
Third-class brick work
Third-class bricks and cement mortar are used in third-class brick work. Government projects do not accept this class, and it is usually done only for temporary work in the private sector.
Brick cuts at corners and ends
Full bricks cannot fill every position in a wall, so closers, bats, and queen closers are cut to finish corners and maintain the bond. The range of brick cuts used in brick masonry covers the shapes a mason needs on a typical job, and cutting bricks accurately keeps the joints tight and the bond intact.
| Class | Mortar mix | Brick quality | Typical use |
|---|---|---|---|
| First class | 1:4 cement sand | Sound, regular, well burned | Load-bearing walls, pillars, multi-storey buildings |
| Second class | 1:4 cement sand | Slightly irregular, min. crushing strength about 70 kg/cm2 | Moderate walls, not two-storey load-bearing work |
| Third class | Cement mortar | Soft, irregular | Temporary work only |
Brick Bonds and Wall Patterns
A bond is the systematic arrangement of bricks so that the vertical joints do not line up across courses. Staggered joints spread the load and make the wall act as a single unit instead of a stack of separate columns.
Common bonds
- Stretcher bond: all bricks laid lengthwise, used for half-brick walls
- Header bond: all bricks laid across the wall, used for curved work
- English bond: alternating courses of headers and stretchers
- Flemish bond: headers and stretchers alternating within each course
English and Flemish bond compared
English bond is stronger and simpler to lay, while Flemish bond looks better and is favored for facing work but needs more skill to keep the joints aligned. Both appear across brick masonry wall construction, and the choice is a balance between strength and appearance.
Choosing a bond
Load-bearing walls usually get English bond for strength, while facades get Flemish bond for appearance. Half-brick partition walls use stretcher bond because every brick lies lengthwise and the wall is only one brick thick.
| Property | English bond | Flemish bond |
|---|---|---|
| Strength | Higher | Lower than English bond |
| Appearance | Plain and regular | Decorative, used for facades |
| Skill needed | Moderate | Higher |
| Course layout | Full header course alternates with full stretcher course | Headers and stretchers alternate in each course |
Brick Masonry Construction Procedure
The construction procedure runs from preparation through laying to curing, and each stage affects the strength of the finished wall.
Materials and equipment
The crew needs bricks, cement, sand, and water plus a trowel, spirit level, plumb bob, string line, and a straight edge. A clean mixing platform keeps the mortar consistent from batch to batch.
Step-by-step procedure
- Clean and soak the bricks so they hold moisture during laying
- Set the string line at the correct level for the course
- Spread a full bed of mortar on the previous course
- Lay the first brick and tap it down to the line
- Check level, plumb, and alignment with the spirit level
- Butter the perpend joints and continue along the line
- Rack back the ends so the next lift ties in
- Keep the wall damp and cure it for at least seven days
Points to consider
Workmanship faults show up as cracked joints and damp walls years later, so the routine checks matter:
- Keep joint thickness uniform, around 10 mm
- Do not leave dry joints or unfilled perpends
- Wet the bricks before laying in hot weather
- Protect fresh work from rain and direct sun
- Complete the whole course before starting the next one
Curing
Curing keeps the mortar hydrated so it can gain strength. Walls are kept damp for seven to fourteen days, and brick masonry construction follows this rule regardless of the brick class or mortar mix.
Brick Masonry in Different Building Parts
Foundation and superstructure
Foundation brickwork sits below ground on the concrete footing and carries the wall loads into the soil. Superstructure brickwork above the damp proof course carries the floors and the roof. First-class brick masonry is specified for both in load-bearing construction, because a failure at either level endangers the whole building.
Parapet walls
Parapets top the external walls at roof level. They take wind and weather directly, so they get a coping or capping and careful joint detailing to shed water away from the wall face.
Partition walls and half-brick walls
Partition or half-brick walls are 4.5-inch thick, non-load-bearing walls that divide internal space. They are built in stretcher bond and rely on the surrounding structure for stability, so their height is limited and they are tied back to the main walls at regular intervals.
Advantages, Disadvantages, and Common Defects
Advantages
- Long service life with low maintenance
- High thermal mass that moderates indoor temperature swings
- Good fire resistance
- Locally available materials in most regions
- Attractive appearance that ages well
Disadvantages
- Slow construction compared with framed systems
- Skilled labor required for consistent quality
- Heavy walls need substantial foundations
- Mortar joints need maintenance and repointing
- Moisture related defects appear when detailing is poor
| Area | Advantages | Disadvantages |
|---|---|---|
| Durability | Decades of service with minimal upkeep | Joints erode and need repointing |
| Thermal | High thermal mass evens out temperatures | Little insulation value on its own |
| Structure | Strong in compression, good fire rating | Heavy, needs strong foundations |
| Speed | Simple materials, available everywhere | Slow to build and labor intensive |
| Moisture | Wall breathes when joints are sound | Dampness and efflorescence when wet |
Water penetration and efflorescence
The two most common brick wall defects are water penetration and efflorescence. Damp walls come from failed joints, missing flashings, or rising damp, and water penetration prevention in brick masonry walls starts with good detailing of copings, sills, and flashings.
Efflorescence is the white powder that appears when soluble salts in the bricks or mortar dissolve in water and crystallize on the surface. It is mostly a cosmetic problem, but heavy deposits signal ongoing moisture, and the causes are covered in the guidance on efflorescence in concrete and brick masonry.