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B&Q£288.00Visit shop - Class B Engineering Brick Smooth Blue Perforated 65mm (X200 Bricks)
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The B&Q Class B Engineering Brick is an ideal choice for professional builders and DIY enthusiasts seeking high structural integrity for demanding construction projects. Its primary benefit lies in its exceptional compressive strength and moisture resistance, making it suitable for both above and below-ground applications; however, users should be aware that the perforation pattern may vary between batches, though this does not impact the structural performance.
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Yes, their low water absorption properties make them ideal for below-ground applications and damp-proof courses.
These bricks have a compressive strength exceeding 75N/sqmm.
No, the perforations are engineered to maintain structural integrity while reducing weight and improving mortar bonding.
Class B engineering bricks are high-strength, but always verify specific fire-rating requirements for chimney flues as they may require specialized refractory materials.
The blue finish is baked into the brick during the firing process, ensuring it remains color-stable even when exposed to harsh weather conditions.
Ensure the mortar is mixed to the correct consistency and check that the perforations are filled to maximize the mechanical lock.
Note that this is a manufacturing variance and does not affect the 75N/sqmm structural rating; mix bricks from different pallets during construction for a consistent look if required.
To ensure the best results, use a high-quality mortar mix appropriate for engineering brickwork. Due to the low water absorption properties of Class B bricks, they require less pre-wetting than porous common bricks, but ensure the bedding surfaces are clean of dust and debris. These bricks are fully compatible with standard metric brick sizing (65mm height). For maintenance, the smooth blue finish can be pressure-washed if used in external landscaping, provided the mortar joints have fully cured and are well-pointed to prevent water ingress.
