Red Class B Engineering Brick 65mm
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Product Details
A Class B engineering brick is a strong, dense brick made to be durable and water-resistant, rather than decorative. It’s commonly used for practical jobs like building foundations, garden walls, retaining walls, and drainage structures—places where strength and resistance to water or frost are more important than looks. If you’re not a builder, think of Class B engineering bricks as the tough, reliable choice for any project that needs to last and stand up to the elements.
As of August 2026, PriceNailer data confirms that the cheapest price for Red Class B Engineering Brick 65mm is £0.54 from Selco across 5 suppliers. Prices have increased by 4.2% over the last 12 months.
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Frequently Asked Questions
What are the dimensions of Red Class B Engineering Bricks 65mm?
Red Class B Engineering Bricks are typically 215mm long x 102.5mm wide x 65mm high, which is the standard UK brick format. The 65mm height makes them slightly thinner than standard bricks, often used where lower course heights are required.
How many Red Class B Engineering Bricks do I need per square metre?
You'll need approximately 60-65 Red Class B Engineering Bricks per square metre of single-skin wall, including allowance for mortar joints. For accurate quantities, always add 5-10% extra to account for breakages and cuts.
What's the difference between Class A and Class B engineering bricks?
Class B engineering bricks have a minimum compressive strength of 75N/mm² and maximum water absorption of 7%, making them suitable for most structural applications. Class A bricks are stronger (125N/mm²) with lower water absorption (4.5%) for more demanding conditions.
Are Red Class B Engineering Bricks suitable for below ground use?
Yes, Red Class B Engineering Bricks are excellent for below ground applications including foundations, retaining walls, and manholes. Their low water absorption and high strength make them ideal for resisting ground moisture and structural loads.
Do Red Class B Engineering Bricks require special mortar?
Use a strong mortar mix such as 1:3 cement to sand ratio for Red Class B Engineering Bricks. Avoid weak lime mortars as they won't match the brick strength and could cause structural issues in load-bearing applications.