Essential Engineering Bricks
Engineering bricks are high-performance masonry units vital for challenging construction areas, defined by their superior high compressive strength and critically low water absorption. This density and resistance to moisture make them indispensable for:
Damp Proof Course (DPC): Stopping rising damp at the ground level.
Load-Bearing Structures: Supporting heavy weights in foundations and walls.
Underground Work: Resisting water and ground salts in manholes and sewers.
Common options include reliable Class B bricks in standard 65mm and taller 73mm sizes. Key products like the Ibstock Red Class B 65mm and the highly dense 65mm Blue Engineering Selected Class B Brick ensure maximum durability for any project.
Frequently Asked Questions about Engineering Bricks
1. What are Engineering Bricks and what makes them different?
Engineering bricks are high-performance building bricks manufactured under intense heat to achieve two key technical properties: high compressive strength and low water absorption. This makes them stronger, denser, and far more resistant to moisture, frost, and chemical attack than standard facing bricks.
2. What is the difference between Class A and Class B Engineering Bricks?
Engineering bricks are classified based on performance:
- Class A Bricks (e.g., K109 Blue Engineering (Solid) 65mm) are the strongest: minimum compressive strength of 125 N/mm² and maximum water absorption of 4.5%.
- Class B Bricks (e.g., Ibstock Red Class B 65mm, 65mm Blue Engineering Selected Class B Brick) are highly versatile and widely used: minimum compressive strength of 75 N/mm² and maximum water absorption of 7%.
3. Where are Engineering Bricks typically used in construction?
They are used in areas where strength, durability, and moisture resistance are critical:
- Damp Proof Course (DPC): Their low water absorption stops rising damp.
- Foundations and heavy load-bearing structures.
- Underground work, such as manholes, inspection chambers, and retaining walls.
4. Is there a difference between Red and Blue Engineering Bricks?
Yes, the colour often relates to the raw materials and firing process. Blue Engineering Bricks (like the K209 Blue Engineer 73mm) are typically fired at higher temperatures in a low-oxygen kiln, which usually gives them a superior density and strength, though both red and blue can meet the Class B requirements.
5. Are engineering bricks available in different sizes?
The most common and standard sizes are 65mm (standard height, e.g., Ibstock Red Class B 65mm) and 73mm (a taller option, e.g., Red Engineer Class B 73mm). Always check the product specification to ensure the correct size for your build.
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