{"product_id":"class-b-engineering-brick-smooth-blue-perforated-65mm","title":"Class B Engineering Brick Smooth Blue Perforated 65mm","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eSmooth blue Class B engineering brick, 65mm, with perforations to reduce unit weight and improve mortar bond during construction.\u003cbr\u003e\u003cbr\u003eDesigned 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.\u003cbr\u003e\u003cbr\u003eAt 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. \u003cbr\u003e\u003cbr\u003eIts size allows for straightforward integration with standard mortar joint thicknesses, maintaining bond patterns and structural integrity. \u003cbr\u003e\u003cbr\u003eThe blue tone results from low-oxygen kiln firing, giving a consistent, uniform finish.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass B rating (to BS EN 771-1):\u003c\/strong\u003e Assures ≥75 N\/mm² compressive strength and ≤7% water absorption for dependable structural performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh compressive strength:\u003c\/strong\u003e Carries significant loads in walls, piers, and foundations without crushing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow water absorption:\u003c\/strong\u003e Resists moisture ingress and freeze-thaw damage for long service in wet or exposed locations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDense, vitrified clay body:\u003c\/strong\u003e Durability in aggressive conditions; good resistance to chemicals and sulfates (check site soils against specification).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmooth finish:\u003c\/strong\u003e Neat, uniform appearance where visible; easy to clean down.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e65mm course height:\u003c\/strong\u003e Integrates with UK coursing for DPCs, retaining walls, and general brickwork.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlue colour from low-oxygen firing: \u003c\/strong\u003eDistinctive hue produced by restricted oxygen conditions in the kiln; minor shade variation is normal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerforated form:\u003c\/strong\u003e Reduced unit weight aids handling; vertical holes improve mortar key without compromising Class B strength.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003cstrong\u003e\u003cem\u003ePlease Note:\u003c\/em\u003e\u003c\/strong\u003e\u003cem\u003e \u003c\/em\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\u003cem\u003ePerforation 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. \u003c\/em\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cem\u003eEngineering bricks are specified for performance; if appearance is the priority, consider facing bricks. \u003c\/em\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cem\u003eAlways follow project specifications for mortar selection, DPCs, movement joints, and drainage, especially in sulfate-bearing soils.\u003c\/em\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFoundations \u0026amp; substructures:\u003c\/strong\u003e Robust below-DPC masonry where strength and moisture resistance are required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDamp-proof courses:\u003c\/strong\u003e Commonly used in two-course DPCs to interrupt rising damp due to low water absorption.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRetaining walls, plinths \u0026amp; cappings:\u003c\/strong\u003e Durable in contact with soil or severe weathering exposures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManholes, inspection chambers \u0026amp; civil works:\u003c\/strong\u003e Suitable for drainage structures and utility builds exposed to wet and aggressive conditions.\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Guidance\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLay to good practice:\u003c\/strong\u003e Full mortar beds with solidly filled perpends; keep perforations vertical to optimise bond and performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDetail for moisture control:\u003c\/strong\u003e Incorporate DPCs, weep holes, and drainage as specified; select mortar appropriate to site conditions and any sulfate risk.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtect fresh work:\u003c\/strong\u003e Shield from rain, frost, and rapid drying; allow adequate curing before backfilling or loading.\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompliance \u0026amp; Performance\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBS EN 771-1, Class B (≥75 N\/mm², ≤7%):\u003c\/strong\u003e Meets requirements for loadbearing masonry in wet\/exposed environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntended service conditions:\u003c\/strong\u003e Suitable for use above or below DPC when designed and detailed to recognised masonry best practice.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Unbranded","offers":[{"title":"Blue \/ Perforated","offer_id":53771416371311,"sku":"5001438","price":1.32,"currency_code":"GBP","in_stock":false},{"title":"Blue \/ Solid","offer_id":53771416404079,"sku":"5001439","price":1.84,"currency_code":"GBP","in_stock":false},{"title":"Red \/ Perforated","offer_id":53771416436847,"sku":"5002008","price":0.67,"currency_code":"GBP","in_stock":false},{"title":"Red \/ Solid","offer_id":53771416469615,"sku":"5001437","price":1.45,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0739\/9784\/4591\/files\/class_B_engineering_brick_blue_perforated_65mm_-_Photo_1_-_1920_comp.jpg?v=1783758364","url":"https:\/\/supplyyard.co.uk\/products\/class-b-engineering-brick-smooth-blue-perforated-65mm","provider":"Supply Yard","version":"1.0","type":"link"}