When to use Engineering Bricks
In the UK, bricks are manufactured in a variety of ways, and certain brick manufacturing techniques result in very versatile and different products. The main types of brick on the market are facing bricks, common bricks and engineering bricks, the lattermost of which we will focus on.

WHAT ARE ENGINEERING BRICKS?
Engineering bricks have a higher level of compressive strength than others, and are often chosen for their physical attributes as opposed to their general aesthetic value. Engineering bricks are classified as either Class A or Class B, with each rating being useful for different construction purposes.
Difference Between Class A and B Engineering Bricks:
- Class A engineering bricks have a higher compressive strength (125N/mm²) than Class B engineering bricks, as well as a lower level of water absorption (<4.5%).
- A Class B engineering brick is more commonly used than a Class A, and can still withstand large amounts of compression (it’s strength rating is 75M/mm²) while also retaining low water absorption (<7%).
WHAT ARE ENGINEERING BRICKS USED FOR?
As specified, using engineering bricks in facing work would not hold any value, as engineering bricks are not chosen for their appearance. Their physical characteristics give them credence over other bricks when being used in buildings where strength, durability and resistance is concerned.
Here are some examples where engineering bricks are used:
- Sewage systems
- Retaining walls
- Civil engineering
- Damp proof courses
- Groundworks
- Manholes
As you can see, engineering brick uses primarily extend to building projects that need robust, durable and reliable bricks that can withstand the harshest weather conditions. In light of that, you shouldn’t use engineering bricks in place of facing bricks, because there is also a strong chance of imperfections in their colours and surfaces.
It’s unlikely that sewage system brickwork is noticeable for its aesthetics and appearance. As far as that’s concerned, the primary concern is that this brickwork holds steady and doesn’t give way.
Other good options for engineering bricks are in construction work where there is likely to be high levels of compression. Class A bricks are suitable for areas of brickwork that are exposed or protruding, therefore prone to excessive weathering. Its low water absorption allows water to
CONSIDERATIONS
If you are planning to use engineering bricks for your next building project, it’s worth asking the following questions:
- Are engineering bricks heat resistant?
- Can you paint engineering bricks?
- What colours can they come in?
- Can you drill into engineering bricks?
- What dimensions should I be looking for?
- Are engineering bricks harder to point?
- What is the density of these bricks?
- What is this going to cost?
- Can these come in precast panels?
As it pertains to colours, blue engineering bricks are a popular choice, though not as popular as the red engineering bricks that are widely used across the building industry.
Modular Clay Products are more than happy to assist you with any considerations of engineering bricks. We specialise in factoring brick solutions that fit our clients’ exact needs, and our experienced sales team will be delighted to lend you valuable advice.