Blue Class A Engineering Brick 65mm
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Blue Class A Engineering Brick 65mm is a dense, high-strength brick designed for demanding structural and groundworks applications, especially where water resistance and durability are essential. Its low water absorption and frost resistance make it ideal for use in foundations, retaining walls, damp-proof courses, manholes, and below-ground projects. The brick’s distinctive blue colour comes from firing special clay at high temperatures, resulting in a hard, non-porous finish that resists weathering, acids, and abrasion. Often called Staffordshire Blue Brick or Ketley Blue Engineering Brick, the term “Class A” indicates the highest strength and lowest water absorption, making it suitable for heavy-duty and exposed environments. The standard 65mm size fits most UK building projects, ensuring compatibility with common brickwork patterns.
As of August 2026, PriceNailer data confirms that the cheapest price for Blue Class A Engineering Brick 65mm is £0.17 from Travis Perkins across 5 suppliers. Prices have increased by 3.9% over the last 12 months.
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Frequently Asked Questions
What is the difference between Class A and Class B engineering bricks?
Class A engineering bricks have higher compressive strength (minimum 125 N/mm²) and lower water absorption (maximum 4.5%) compared to Class B bricks. This makes Class A bricks suitable for the most demanding structural applications and harsh environments.
How many Blue Class A Engineering Bricks do I need per square metre?
For standard brickwork with 10mm mortar joints, you'll need approximately 60 bricks per square metre for stretcher bond. This calculation includes a small allowance for cutting and wastage in typical construction projects.
Can Blue Class A Engineering Bricks be used above ground level?
Yes, while primarily designed for below-ground applications, Blue Class A Engineering Bricks can be used above ground for structural work, retaining walls, and areas requiring exceptional durability. Their distinctive blue colour makes them popular for architectural features too.
Are Blue Class A Engineering Bricks frost resistant?
Yes, Blue Class A Engineering Bricks have excellent frost resistance due to their low water absorption rate and dense structure. This makes them ideal for exposed applications and areas subject to freeze-thaw cycles.
What mortar should I use with Blue Class A Engineering Bricks?
Use a strong mortar mix, typically 1:3 cement to sharp sand ratio, to match the brick's high strength. Avoid weaker lime mortars as they won't provide adequate performance with these high-strength engineering bricks.