How Brickwork Quality Affects The Long-Term Performance Of A Building

When a building is complete and occupied, the brickwork that forms its walls, facades and structural elements largely disappears from conscious thought. It is simply there, doing its job. 

But the quality of that brickwork, and the standard to which it was laid during construction, has a direct and lasting impact on the performance, durability and maintenance requirements of the building for decades to come. 

Here is a closer look at why brickwork quality matters so much in the long run.

Structural Integrity

Brickwork is not simply a decorative finish. In most traditional and modern masonry construction, it forms part of the structural system of the building, transferring loads from floors, roofs and upper storeys down through the walls and into the foundations. 

The quality of the brickwork, including the accuracy of the bonding pattern, the consistency of the mortar joints and the correct installation of lintels and support elements, all contribute to the structural integrity of the building as a whole.

Poor brickwork, characterised by inconsistent joints, inadequate mortar coverage or incorrect bonding, creates weaknesses in the wall structure that may not be immediately apparent but can manifest over time as cracking, movement or, in more serious cases, structural instability. 

On a large development with many units, the cumulative effect of substandard brickwork across multiple plots can result in significant remedial costs and reputational damage for the developer.

Weather Resistance / Moisture Management

One of the primary functions of external brickwork is to protect the interior of the building from the elements. The ability of a brick wall to resist the penetration of wind-driven rain depends not just on the quality of the bricks themselves but on the quality of the mortar joints and the workmanship used to lay them.

Mortar Joint Quality

Poorly filled or inconsistently finished mortar joints are one of the most common routes for moisture to enter a wall. Joints that are not fully packed with mortar, or that have been finished in a way that allows water to sit on the surface rather than being directed away, create the conditions for damp penetration. 

Over time, repeated cycles of wetting and drying, combined with frost action in winter, can cause mortar to deteriorate and spall, opening up increasingly large gaps in the wall's weather resistance.

Cavity Wall Performance

In modern cavity wall construction, the cavity between the inner and outer leaf of the wall plays a critical role in managing moisture. 

Mortar droppings that fall into the cavity during construction and accumulate on wall ties or cavity insulation can bridge the cavity and allow moisture to track across to the inner leaf, causing damp problems internally. 

Good brickwork practice includes keeping the cavity clean throughout construction, a detail that requires discipline and attention on site but makes a significant difference to the long-term performance of the wall.

Thermal Performance

The thermal performance of a building's fabric is increasingly important, both in terms of regulatory compliance and the ongoing energy costs faced by occupants. The way brickwork is laid, and in particular the management of cold bridges at junctions between elements, has a direct impact on how well the building retains heat.

Poorly executed brickwork that leaves gaps in insulation, creates unintended thermal bridges or fails to achieve the correct tolerances at wall junctions can undermine the designed thermal performance of the building envelope, resulting in higher energy bills for occupants and potential compliance issues for the developer.

Aesthetic Longevity

The visual quality of brickwork has a direct bearing on how a building ages and how it is perceived over the course of its life. Consistent coursing, even joint widths, well-executed detailing and careful selection and handling of bricks all contribute to a finished appearance that remains attractive over time.

Brickwork that has been laid inconsistently, with varying joint widths, misaligned courses or poorly matched bricks, will look worse rather than better as the building ages. 

On a premium residential development or a high-profile commercial project, the aesthetic quality of the brickwork is a significant part of the value being delivered to the end user and should be treated as such.

Reducing Long-Term Maintenance Costs

The relationship between brickwork quality and maintenance costs is straightforward. Well-laid brickwork using appropriate materials and correct techniques requires very little attention over its working life.

Poorly laid brickwork, by contrast, may require repointing, crack repair or more extensive remedial works within a relatively short period, all of which add cost and disruption for building owners and occupants.

For developers and housing associations with large portfolios of properties to maintain, the difference in long-term maintenance between high-quality and substandard brickwork across hundreds of units is substantial.