Class B Engineering Brick Smooth Blue Perforated 65mm
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Smooth blue Class B engineering brick with high strength and low water absorption. Ideal for structural, retaining, and party walls above-or-below ground. Perforations reduce weight and improve mortar grip.
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Product Overview
Smooth blue Class B engineering brick with high strength and low water absorption. Ideal for structural, retaining, and party walls above-or-below ground. Perforations reduce weight and improve mortar grip.
Delivery & Returns Information
How Our Delivery Works
We work with a nationwide network of trusted suppliers. As a result, items in your basket may be supplied by different suppliers and delivered separately. Where this applies, you'll see multiple delivery charges at checkout. We always aim to group products from the same supplier to keep delivery costs as low as possible.
Delivery Areas & Charges
Delivery charges listed on our website apply to mainland UK, excluding the following postcode areas: AB, CF, DD, DG, FK, KW, IV, LA, LD, LL, NP, PA, PH, SA, SY
If your delivery address falls within one of these postcode areas, we’ll be in touch before processing your order to confirm any additional delivery costs.
Please note: We do not currently offer delivery outside the UK mainland.
Standard (Nationwide) Delivery
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Core Products Core
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|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £300 ex. VAT | £20 ex. VAT |
| Over £300 ex. VAT | FREE |
Core Delivery charges apply only when all products in an order that have equivalents are accepted as such. If even one product cannot be substituted with an equivalent, the entire order will not qualify for Core Delivery charges.
| Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products | |
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £300 | £10 ex. VAT |
| Over £300 ex. VAT | FREE |
| Insulation, Plasterboard and Drylining Products | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £350 | £35 ex. VAT |
| Over £350 ex. VAT | FREE |
| Screws & Fixings and Adhesives & Sealants | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £50 | £5 ex. VAT |
| Over £50 ex. VAT | FREE |
Express Delivery
| Express Delivery - Insulation and Plasterboard & Drylining | |
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £400 | £50 ex. VAT |
| Over £400 ex. VAT | £35 ex. VAT |
| Express Delivery - Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £300 | £50 ex. VAT |
| Over £300 ex. VAT | £35 ex. VAT |
Returns
We offer a 30 day returns policy on any faulty products.
Key Features
- {{invert_colors_off}} Low water absorption/ low water porosity
- {{fitness_center}} High compressive strength
- {{view_comfy}} Can be used above and below ground
- {{ac_unit}} Resilient to frost damage
Technical Specification
| Product: | Perforated |
|---|---|
| Length: | 215mm |
| Height: | 65mm |
| Sales Unit: | Each |
| Weight: | 3.01kg |
| Compressive Strength: | 75N/mm2 |
| Colour: | Blue |
| Depth: | 102.5mm |
Product Overview
Smooth blue Class B engineering brick, 65mm, with perforations to reduce unit weight and improve mortar bond during construction.
Designed for high-strength applications, it offers compressive strength in excess of 75N/mm² and low water absorption, making it suitable for use in loadbearing walls both above and below ground.
At 65mm high, this brick conforms to the UK standard work size (215mm x 102.5mm x 65mm), ensuring compatibility with common walling and coursing dimensions.
Its size allows for straightforward integration with standard mortar joint thicknesses, maintaining bond patterns and structural integrity.
The blue tone results from low-oxygen kiln firing, giving a consistent, uniform finish.
Features & Benefits
- Class B rating (to BS EN 771-1): Assures ≥75 N/mm² compressive strength and ≤7% water absorption for dependable structural performance.
- High compressive strength: Carries significant loads in walls, piers, and foundations without crushing.
- Low water absorption: Resists moisture ingress and freeze-thaw damage for long service in wet or exposed locations.
- Dense, vitrified clay body: Durability in aggressive conditions; good resistance to chemicals and sulfates (check site soils against specification).
- Smooth finish: Neat, uniform appearance where visible; easy to clean down.
- 65mm course height: Integrates with UK coursing for DPCs, retaining walls, and general brickwork.
- Blue colour from low-oxygen firing: Distinctive hue produced by restricted oxygen conditions in the kiln; minor shade variation is normal.
- Perforated form: Reduced unit weight aids handling; vertical holes improve mortar key without compromising Class B strength.
Please Note:
- Perforation number and pattern may vary between batches; this does not affect structural performance and is within manufacturing tolerances. Colour shade can vary slightly due to raw materials and firing; this is normal for fired clay products.
- Engineering bricks are specified for performance; if appearance is the priority, consider facing bricks.
- Always follow project specifications for mortar selection, DPCs, movement joints, and drainage, especially in sulfate-bearing soils.
Applications
- Foundations & substructures: Robust below-DPC masonry where strength and moisture resistance are required.
- Damp-proof courses: Commonly used in two-course DPCs to interrupt rising damp due to low water absorption.
- Retaining walls, plinths & cappings: Durable in contact with soil or severe weathering exposures.
- Manholes, inspection chambers & civil works: Suitable for drainage structures and utility builds exposed to wet and aggressive conditions.
Installation Guidance
- Lay to good practice: Full mortar beds with solidly filled perpends; keep perforations vertical to optimise bond and performance.
- Detail for moisture control: Incorporate DPCs, weep holes, and drainage as specified; select mortar appropriate to site conditions and any sulfate risk.
- Protect fresh work: Shield from rain, frost, and rapid drying; allow adequate curing before backfilling or loading.
Compliance & Performance
- BS EN 771-1, Class B (≥75 N/mm², ≤7%): Meets requirements for loadbearing masonry in wet/exposed environments.
- Intended service conditions: Suitable for use above or below DPC when designed and detailed to recognised masonry best practice.
