{"title":"Engineering Bricks | Building Supplies","description":"\u003cp data-start=\"392\" data-end=\"790\"\u003eEngineering bricks are designed for applications where strength, durability and water resistance are essential. Ideal for foundations, retaining walls, damp-proof courses and load-bearing structures, they offer exceptional performance in demanding environments. Their low water absorption and high compressive strength make engineering bricks a dependable choice for long-term structural integrity.\u003c\/p\u003e\n\u003ch3 data-start=\"792\" data-end=\"865\"\u003eBlue Engineering Bricks for Maximum Durability and Water Resistance\u003c\/h3\u003e\n\u003cp data-start=\"866\" data-end=\"1216\"\u003e\u003ca href=\"\/products\/wienerberger-k201-perforated-smooth-blue-engineering-brick-pack-of-400\" title=\"Blue engineering bricks\"\u003e\u003cstrong data-start=\"866\" data-end=\"893\"\u003eBlue engineering bricks\u003c\/strong\u003e\u003c\/a\u003e are known for their extremely low water absorption, making them ideal for retaining walls, damp-proof courses, heavy-duty structural work and environments exposed to moisture. Their dense composition and high compressive strength ensure \u003cstrong data-start=\"1131\" data-end=\"1158\"\u003eblue engineering bricks\u003c\/strong\u003e provide industry-leading performance in harsh conditions.\u003c\/p\u003e\n\u003ch3 data-start=\"1218\" data-end=\"1288\"\u003eRed Engineering Bricks for Strong, Cost-Effective Structural Use\u003c\/h3\u003e\n\u003cp data-start=\"1289\" data-end=\"1649\"\u003e\u003ca href=\"\/products\/wienerberger-red-class-b-perf-engineering-brick-pack-of-400\" title=\"Red engineering bricks\"\u003e\u003cstrong data-start=\"1289\" data-end=\"1315\"\u003eRed engineering bricks\u003c\/strong\u003e\u003c\/a\u003e offer excellent strength and durability while providing a more traditional brick appearance. They are widely used in general structural applications, boundary walls, industrial builds and areas requiring added resilience. \u003cstrong data-start=\"1538\" data-end=\"1564\"\u003eRed engineering bricks\u003c\/strong\u003e deliver a reliable balance of performance and value for demanding construction work.\u003c\/p\u003e\n\u003ch3 data-start=\"1651\" data-end=\"1732\"\u003eEngineering Bricks for Load-Bearing, Damp-Proof and Structural Applications\u003c\/h3\u003e\n\u003cp data-start=\"1733\" data-end=\"2040\"\u003e\u003ca href=\"\/products\/ibstock-lodge-lane-staffs-solid-blue-engineering-brick-pack-of-380\" title=\"Engineering bricks\"\u003e\u003cstrong data-start=\"1733\" data-end=\"1755\"\u003eEngineering bricks\u003c\/strong\u003e\u003c\/a\u003e are specifically manufactured to offer superior strength, frost resistance and long-term protection against water penetration. Their uniform shape and density make \u003cstrong data-start=\"1920\" data-end=\"1942\"\u003eengineering bricks\u003c\/strong\u003e suitable for foundations, manholes, chimney bases, retaining structures and heavily loaded walls.\u003c\/p\u003e\n\u003ch3 data-start=\"2042\" data-end=\"2100\"\u003eBuilt for Harsh Conditions and Long-Term Performance\u003c\/h3\u003e\n\u003cp data-start=\"2101\" data-end=\"2333\"\u003eManufactured to high standards with excellent thermal and compressive qualities, engineering bricks are designed to perform in challenging environments — including high-moisture areas, heavy-traffic zones and structural load points.\u003c\/p\u003e\n\u003ch3 data-start=\"2335\" data-end=\"2389\"\u003eConsistent Quality for Professional Construction\u003c\/h3\u003e\n\u003cp data-start=\"2390\" data-end=\"2571\"\u003eOur engineering bricks come from trusted UK manufacturers and meet strict performance standards, ensuring reliable results for both commercial construction and residential projects.\u003c\/p\u003e\n\u003ch2 data-start=\"2573\" data-end=\"2580\"\u003eFAQs\u003c\/h2\u003e\n\u003ch4 data-start=\"2582\" data-end=\"2669\"\u003eWhat is the difference between blue engineering bricks and red engineering bricks?\u003c\/h4\u003e\n\u003cp data-start=\"2670\" data-end=\"2851\"\u003e\u003cstrong data-start=\"2670\" data-end=\"2697\"\u003eBlue engineering bricks\u003c\/strong\u003e offer lower water absorption and higher durability, while \u003cstrong data-start=\"2756\" data-end=\"2782\"\u003ered engineering bricks\u003c\/strong\u003e are strong but often used where appearance and value are priorities.\u003c\/p\u003e\n\u003ch4 data-start=\"2853\" data-end=\"2913\"\u003eAre engineering bricks suitable for damp-proof courses?\u003c\/h4\u003e\n\u003cp data-start=\"2914\" data-end=\"3037\"\u003eYes — \u003cstrong data-start=\"2920\" data-end=\"2942\"\u003eengineering bricks\u003c\/strong\u003e are commonly used for DPC zones thanks to their low water absorption and excellent durability.\u003c\/p\u003e\n\u003ch4 data-start=\"3039\" data-end=\"3093\"\u003eCan engineering bricks be used for visible walls?\u003c\/h4\u003e\n\u003cp data-start=\"3094\" data-end=\"3279\"\u003eAbsolutely. While structural performance is their main purpose, \u003cstrong data-start=\"3158\" data-end=\"3180\"\u003eengineering bricks\u003c\/strong\u003e can also be used in visible areas, especially where strength and weather resistance are essential.\u003c\/p\u003e\n\u003cp data-start=\"3094\" data-end=\"3279\"\u003e\u003cspan style=\"font-size: 11.0pt; line-height: 107%; font-family: 'Arial',sans-serif; mso-fareast-font-family: Aptos; mso-fareast-theme-font: minor-latin; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;\"\u003eCheck out our other \u003cb\u003e\u003ca href=\"\/collections\/building-supplies\" title=\"Building Supplies\"\u003eBuilding Supplies\u003c\/a\u003e \u003c\/b\u003eand\u003cb\u003e \u003ca href=\"\/collections\/bricks-blocks\" title=\"Bricks and Blocks\"\u003eBricks and Blocks\u003c\/a\u003e \u003c\/b\u003erange at JJ Building Materials.\u003c\/span\u003e\u003c\/p\u003e","products":[{"product_id":"ibstock-brunel-blue-smooth-perf-engineering-brick-pack-of-520","title":"Ibstock Brunel Blue Smooth Perf Engineering Brick Pack of 520","description":"\u003ch3\u003eBrunel Blue Smooth Perforated Brick\u003c\/h3\u003e\n\nThe Brunel Blue Smooth Perf brick blends architectural elegance with structural strength. With its deep slate-blue hue and smooth surface, this brick delivers a look of sophistication. Classified as a Class B wirecut brick, it’s engineered for strength and durability in demanding conditions, making it suitable for both exposed masonry and functional structural elements.\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eProduct type:\u003c\/b\u003eWirecut, Class B\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eColour:\u003c\/b\u003eBlue\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePack size:\u003c\/b\u003e520 bricks per pack\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDurability (frost resistance):\u003c\/b\u003eF2\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eActive soluble salts:\u003c\/b\u003eS2\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCompressive strength:\u003c\/b\u003e40 N\/mm²\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Choose Brunel Blue Smooth Perf?\u003c\/h3\u003e\n\nStrength for purpose — With a compressive strength of 40 N\/mm², it sits well within the engineering brick realm, suitable for use in walls subject to load or moisture exposure.\n\nLow moisture uptake — As a Class B brick, it offers balanced water absorption and frost resistance, ideal for exterior use.\n\nRefined aesthetics — The smooth finish and deep blue color present a clean, modern appearance that works well for both accent walls and full façades.\n\nPerforated design — The perf (perforated) configuration reduces weight and improves handling, while preserving structural quality.\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e \u003ch4\u003eIs this brick suitable for loadbearing masonry?\u003c\/h4\u003e Yes — its classification and 40 N\/mm² strength make it capable of structural use in many typical masonry designs. Always confirm loads, mortar spec, and regulatory compliance for your project. \u003ch4\u003eWill the blue tone remain consistent over time?\u003c\/h4\u003e Yes, the dark blue color in engineering bricks is stable and designed to weather naturally. Slight surface patina may develop, but the core tone endures. \u003ch4\u003eIs the perforated design weaker?\u003c\/h4\u003e Not significantly — the perforations are designed to reduce material weight and improve mortar keying while preserving the brick’s strength.\u003cbr\u003e\u003cp\u003eCheck out our full range of \u003ca href=\"https:\/\/jjbuildingmaterials.co.uk\/collections\/building-supplies\"\u003ebuilding supplies\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003eBrowse more \u003ca href=\"https:\/\/jjbuildingmaterials.co.uk\/collections\/bricks-blocks\"\u003ebricks \u0026amp; blocks\u003c\/a\u003e available online.\u003c\/p\u003e","brand":"Ibstock","offers":[{"title":"Default Title","offer_id":51448213995862,"sku":"161811","price":737.35,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0905\/4509\/4998\/files\/ibstock-brunel-blue-smooth-perf-engineering-brick-pack-of-520-1186582.jpg?v=1772656998"},{"product_id":"ibstock-staffordshire-slate-blue-smooth-perf-engineering-brick-pack-of-380","title":"Ibstock Staffordshire Slate Blue Smooth Perf Engineering Brick Pack of 380","description":"\u003ch3\u003eIbstock Staffordshire Slate Blue Smooth Engineering Brick\u003c\/h3\u003e\n\nThe Ibstock Staffordshire Slate Blue Smooth is a high-performance engineering brick, designed for strength, durability, and moisture resistance. With its deep slate-blue colour and smooth wirecut finish, it not only offers structural reliability but also adds a distinctive architectural character when left exposed.\n\nThis brick is often used below DPC level, in retaining walls, or anywhere that demands maximum strength and resistance to weathering. Its classic Staffordshire Blue finish also makes it a popular choice for projects where aesthetics and durability need to work hand-in-hand.\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eDimensions (L × W × H):\u003c\/b\u003e215 × 102 × 65 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePack quantity:\u003c\/b\u003e380 bricks per pack\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSize tolerance:\u003c\/b\u003eT2\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eRange tolerance:\u003c\/b\u003eR1\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eGross dry density:\u003c\/b\u003e~1650 kg\/m³\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCompressive strength:\u003c\/b\u003e? 75 N\/mm²\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eThermal conductivity:\u003c\/b\u003e0.840 W\/(m·K)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDurability designation:\u003c\/b\u003eF2\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMaximum water absorption:\u003c\/b\u003e? 7 %\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eReaction to fire:\u003c\/b\u003eClass A1\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eActive soluble salts:\u003c\/b\u003eS2\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eProduction method \/ configuration:\u003c\/b\u003eExtruded wirecut, vertically perforated\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFinish \/ colour:\u003c\/b\u003eSmooth surface, slate blue\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Choose Staffordshire Slate Blue Smooth Engineering Bricks?\u003c\/h3\u003e\n\nUnmatched strength — With ? 75 N\/mm² compressive strength, these are among the strongest clay bricks available.\n\nLow absorption — ? 7 % water absorption ensures excellent protection against frost, damp, and staining.\n\nDurability — F2 rating means they withstand severe exposure conditions, making them ideal for retaining walls, foundations, and external use.\n\nDistinctive finish — The smooth slate-blue colour gives a timeless appearance when used decoratively.\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e \u003ch4\u003eWhat’s the difference between engineering bricks and facing bricks?\u003c\/h4\u003e Engineering bricks prioritise strength, water resistance, and durability, whereas facing bricks are designed mainly for aesthetics. Engineering bricks like these can be used structurally and in damp or exposed conditions. \u003ch4\u003eCan these be used below the damp proof course (DPC)?\u003c\/h4\u003e Yes. Their low water absorption and high durability make them ideal for use below DPC level or in areas with frequent water exposure. \u003ch4\u003eAre they suitable for decorative use?\u003c\/h4\u003e Absolutely. While designed for engineering performance, the smooth blue finish gives a distinctive appearance, making them suitable for exposed brickwork where aesthetics matter.\u003cbr\u003e\u003cp\u003eCheck out our full range of \u003ca href=\"https:\/\/jjbuildingmaterials.co.uk\/collections\/building-supplies\"\u003ebuilding supplies\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003eBrowse more \u003ca href=\"https:\/\/jjbuildingmaterials.co.uk\/collections\/bricks-blocks\"\u003ebricks \u0026amp; blocks\u003c\/a\u003e available online.\u003c\/p\u003e","brand":"Ibstock","offers":[{"title":"Default Title","offer_id":51448225300822,"sku":"161863","price":593.41,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0905\/4509\/4998\/files\/ibstock-staffordshire-slate-blue-smooth-perf-engineering-brick-pack-of-380-9465472.jpg?v=1772656943"},{"product_id":"ibstock-lodge-lane-staffs-solid-blue-engineering-brick-pack-of-380","title":"Ibstock Lodge Lane Staffs Solid Blue Engineering Brick Pack of 380","description":"\u003ch3\u003eIbstock Lodge Lane Staffordshire Blue Solid 65 mm Brick\u003c\/h3\u003e\n\nThe Ibstock Lodge Lane Staffordshire Blue brick is a robust solid brick with a classic blue-slate hue and smooth finish. Though often classified as a facing brick, its physical properties also make it suitable for structural and exposed applications. With its distinctive colour, durability, and performance, it offers both aesthetic appeal and functional strength.\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eDimensions (L × W × H):\u003c\/b\u003e215 × 102 × 65 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePack quantity:\u003c\/b\u003e380 bricks per pack\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eType \/ Usage:\u003c\/b\u003eSolid brick (used in facing or structural work)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWater absorption:\u003c\/b\u003e~ 7 %\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCompressive strength:\u003c\/b\u003e~ 75 N\/mm²\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDurability classification:\u003c\/b\u003eF2\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eColour \/ texture:\u003c\/b\u003eSmooth blue \/ slate finish\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eProduction method:\u003c\/b\u003eExtruded \/ wirecut \/ perforated (solid variant)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWeight (pack):\u003c\/b\u003e~ 1,216 kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Choose Lodge Lane Staffordshire Blue?\u003c\/h3\u003e\n\nLodge Lane Staffordshire Blue offers a striking and distinctive façade tone that pairs well with contemporary and heritage designs. Its smooth blue finish gives a clean yet characterful visual, while the 7 % water absorption and high compressive strength ensure robustness against weathering, moisture, and load demands. As an F2-rated brick, it is designed for exposed conditions and long-term durability.\n\nBecause it is solid rather than hollow, it can perform in both loadbearing and decorative contexts, making it a versatile option in external walling, garden walls, or feature facades.\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e \u003ch4\u003eIs this brick suitable for structural use?\u003c\/h4\u003e Yes. With a compressive strength of about 75 N\/mm² and low absorption, it is capable of loadbearing and exposed applications, provided design and detailing requirements are met. \u003ch4\u003eDoes the blue colour change over time?\u003c\/h4\u003e The deep blue\/slate tone is stable. Some surface weathering may soften the appearance with age, but the core colour remains resilient. \u003ch4\u003eCan I use it for both facing and engineering purposes?\u003c\/h4\u003e Yes—it’s often used as a facing brick where aesthetics are important, but its engineering capability enables it to function in structural, exposed or damp-prone situations.\u003cbr\u003e\u003cp\u003eCheck out our full range of \u003ca href=\"https:\/\/jjbuildingmaterials.co.uk\/collections\/building-supplies\"\u003ebuilding supplies\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003eBrowse more \u003ca href=\"https:\/\/jjbuildingmaterials.co.uk\/collections\/bricks-blocks\"\u003ebricks \u0026amp; blocks\u003c\/a\u003e available online.\u003c\/p\u003e","brand":"Ibstock","offers":[{"title":"Default Title","offer_id":51448227397974,"sku":"161864","price":723.9,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0905\/4509\/4998\/files\/ibstock-lodge-lane-staffs-solid-blue-engineering-brick-pack-of-380-9879009.jpg?v=1772656938"},{"product_id":"wienerberger-red-class-b-engineering-solid-engineering-brick-pack-of-400","title":"Wienerberger Red Class B Engineering Solid Engineering Brick Pack of 400","description":"\u003ch3\u003eWienerberger Red Class B Engineering Solid Brick – Pack of 400\u003c\/h3\u003e\n\nThe Wienerberger Red Class B Engineering Solid Brick is designed for structural and performance-driven applications where durability and strength are essential. Unlike facing bricks, engineering bricks prioritise technical performance over aesthetics, making them ideal for groundworks, retaining walls, sewers, and damp-proof courses.\n\nThis brick offers a strong compressive strength of ? 75 N\/mm² and low water absorption of ? 7%, ensuring reliability in demanding conditions. Its red colour provides a more traditional appearance, while its frost resistance (F2 rating) makes it suitable for external and below-ground applications.\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eSize:\u003c\/b\u003e215mm × 102.5mm × 65mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eColour:\u003c\/b\u003eRed\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTexture:\u003c\/b\u003eSmooth, Solid Engineering Brick\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWater Absorption:\u003c\/b\u003e? 7%\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDurability:\u003c\/b\u003eF2\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCompressive Strength:\u003c\/b\u003e? 75 N\/mm²\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePack Quantity:\u003c\/b\u003e400\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eType:\u003c\/b\u003eClass B Engineering Brick\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eActive Soluble Salts:\u003c\/b\u003eS2\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eStandards Compliance:\u003c\/b\u003eBS EN 771-1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDescription \u0026amp; Usage Notes\u003c\/h3\u003e Manufactured for performance, this Class B engineering brick provides excellent strength and water resistance. It is suitable for structural uses such as load-bearing walls, manholes, retaining walls, and damp-proof courses.\n\nWhile it can be used above ground, its appearance may vary as aesthetics are not its main purpose. If visual finish is critical, a facing brick should be considered.\n\nFor long-term durability, install with appropriate detailing: use suitable mortar, ensure proper drainage, and allow for expansion and movement where required. Always follow best practice for cavity wall or structural applications.\n\n\u003ch3\u003eFAQs\u003c\/h3\u003e \u003ch4\u003eWhat makes this a Class B engineering brick?\u003c\/h4\u003e Class B engineering bricks are defined by compressive strength of ? 75 N\/mm² and water absorption of ? 7%. They are robust and reliable for most structural uses. \u003ch4\u003eCan Class B engineering bricks be used underground?\u003c\/h4\u003e Yes — their durability and low absorption make them suitable for below-ground use, including foundations, manholes, and retaining structures. \u003ch4\u003eDo these bricks have a consistent appearance?\u003c\/h4\u003e Not always. Engineering bricks are specified for performance, so colour and surface finish may vary. For decorative work, facing bricks are better suited.\u003cbr\u003e\u003cp\u003eCheck out our full range of \u003ca href=\"https:\/\/jjbuildingmaterials.co.uk\/collections\/building-supplies\"\u003ebuilding supplies\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003eBrowse more \u003ca href=\"https:\/\/jjbuildingmaterials.co.uk\/collections\/bricks-blocks\"\u003ebricks \u0026amp; blocks\u003c\/a\u003e available online.\u003c\/p\u003e","brand":"Weinerberger","offers":[{"title":"Default Title","offer_id":51448301191510,"sku":"161930","price":611.83,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0905\/4509\/4998\/files\/wienerberger-red-class-b-engineering-solid-engineering-brick-pack-of-400-9201966.jpg?v=1772656836"},{"product_id":"wienerberger-k209-blue-perforated-class-b-engineering-brick","title":"Wienerberger K209 Blue Perforated Class B 73mm Engineering Brick Pack of 368","description":"\u003ch3\u003eWienerberger K209 Blue Perforated Class B 73 mm Engineering Brick\u003c\/h3\u003e\n\u003cp\u003eThis brick is a perforated, extruded wirecut engineering unit designed for strength, moisture resistance, and structural use rather than appearance. Engineering bricks are classified by performance, not visual quality. Because clay and manufacturing can vary, mixing units from multiple packs is prudent to minimise tone variation.\u003c\/p\u003e\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e215mm × 102.5mm × 73mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColour:\u003c\/strong\u003eBlue\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTexture:\u003c\/strong\u003eSmooth, Perforated Wirecut\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater Absorption:\u003c\/strong\u003e? 7%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003eF2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompressive Strength:\u003c\/strong\u003e? 75 N\/mm²\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack Quantity:\u003c\/strong\u003e368\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eActive Soluble Salts:\u003c\/strong\u003eS2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermal Conductivity:\u003c\/strong\u003e0.840 W\/(m·K)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReaction to Fire:\u003c\/strong\u003eClass A1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGross Dry Density:\u003c\/strong\u003e1800 kg\/m³\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize Tolerance:\u003c\/strong\u003eT2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRange Tolerance:\u003c\/strong\u003eR1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDescription \u0026amp; Usage Notes\u003c\/h3\u003e\n\u003cp\u003eThe **K209 Blue Class B** perforated engineering brick is engineered for high-load and moisture-critical environments such as foundations, retaining structures, or damp-proof courses. With a strong compressive strength of ? 75 N\/mm² and a low water absorption rating (? 7%), it performs reliably under demanding conditions. The F2 frost-resistance rating further supports its use in exposed applications. Because this is an engineering brick, surface appearance (colour, texture uniformity) is not the primary focus. For aesthetic facades, use a facing brick. Mix bricks from different packs to reduce visible variation. Use proper detailing—cavity design, flashing, drainage, mortar compatibility—to ensure longevity.\u003c\/p\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003ch4\u003eIs 7% water absorption acceptable for engineering bricks?\u003c\/h4\u003e\n\u003cp\u003eYes — for Class B engineering bricks, ? 7% absorption is standard and helps ensure durability in load-bearing and moisture-prone applications.\u003c\/p\u003e\n\u003ch4\u003eWhat does the F2 durability rating mean?\u003c\/h4\u003e\n\u003cp\u003eIt means the brick is frost-resistant and suitable for general UK external exposure. In extremely harsh or marine environments, higher durability classes or protective design may be advisable.\u003c\/p\u003e\n\u003ch4\u003eCan this engineering brick be used as a facing brick?\u003c\/h4\u003e\n\u003cp\u003eIt’s technically possible but not recommended. Engineering bricks aren’t manufactured for consistent visual quality, so for visible facades, a designated facing brick is usually a better choice.\u003c\/p\u003e\n\u003cp\u003eCheck out our full range of \u003ca href=\"https:\/\/jjbuildingmaterials.co.uk\/collections\/building-supplies\"\u003ebuilding supplies\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eBrowse more \u003ca href=\"https:\/\/jjbuildingmaterials.co.uk\/collections\/bricks-blocks\"\u003ebricks \u0026amp; blocks\u003c\/a\u003e available online.\u003c\/p\u003e","brand":"Weinerberger","offers":[{"title":"Default Title","offer_id":51448303649110,"sku":"161977","price":600.44,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0905\/4509\/4998\/files\/wienerberger-k209-blue-perforated-class-b-73mm-engineering-brick-pack-of-368-8798272.jpg?v=1772656832"},{"product_id":"wienerberger-k109-solid-blue-engineering-engineering-brick-pack-of-400","title":"Wienerberger K109 Solid Blue Engineering Engineering Brick Pack of 400","description":"\u003ch3\u003eWienerberger K109 Blue Solid Class B Engineering Brick\u003c\/h3\u003e\n\nThe Wienerberger K109 Blue Solid Class B Engineering Brick is designed for heavy-duty performance where strength, moisture resistance, and long-term durability are essential. Being solid and non-perforated, it provides maximum stability and resilience, making it suitable for foundations, retaining walls, damp-proof courses, and other demanding applications.\n\nUnlike facing bricks, engineering bricks are specified for technical properties rather than appearance. Colour and surface finish may vary, so for visible facades a facing brick is often a better choice.\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eSize:\u003c\/b\u003e215mm × 102.5mm × 65mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eColour:\u003c\/b\u003eBlue\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTexture:\u003c\/b\u003eSmooth, Solid Engineering Brick\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWater Absorption:\u003c\/b\u003e? 7%\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDurability:\u003c\/b\u003eF2\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCompressive Strength:\u003c\/b\u003e? 75 N\/mm²\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePack Quantity:\u003c\/b\u003e504\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eActive Soluble Salts:\u003c\/b\u003eS2\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eGross Dry Density:\u003c\/b\u003e1800 kg\/m³\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eReaction to Fire:\u003c\/b\u003eClass A1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDescription \u0026amp; Usage Notes\u003c\/h3\u003e Manufactured for strength and durability, the K109 is a reliable choice for structural and below-ground projects. With compressive strength of ? 75 N\/mm² and low water absorption of ? 7%, it offers robust resistance to water ingress and structural stress. Its F2 frost resistance ensures performance in typical UK exposure conditions.\n\nBecause engineering bricks prioritise function, they may not have a uniform surface or shade. They are best used where technical performance is the priority. Always ensure correct detailing — including suitable mortar, proper drainage, and cavity design — to maximise service life.\n\n\u003ch3\u003eFAQs\u003c\/h3\u003e \u003ch4\u003eWhat makes this a Class B engineering brick?\u003c\/h4\u003e It meets the standard for Class B, offering compressive strength of ? 75 N\/mm² and water absorption of ? 7%, making it suitable for most structural and moisture-prone applications. \u003ch4\u003eWhy choose a solid engineering brick over perforated?\u003c\/h4\u003e A solid brick provides maximum strength and reduced water pathways, making it especially suitable for heavy load-bearing or below-ground conditions. \u003ch4\u003eCan this brick be used in visible facades?\u003c\/h4\u003e It can, but its appearance is secondary to performance. If aesthetics are important, a facing brick would be a better option.\u003cbr\u003e\u003cp\u003eCheck out our full range of \u003ca href=\"https:\/\/jjbuildingmaterials.co.uk\/collections\/building-supplies\"\u003ebuilding supplies\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003eBrowse more \u003ca href=\"https:\/\/jjbuildingmaterials.co.uk\/collections\/bricks-blocks\"\u003ebricks \u0026amp; blocks\u003c\/a\u003e available online.\u003c\/p\u003e","brand":"Weinerberger","offers":[{"title":"Default Title","offer_id":51448303714646,"sku":"161978","price":694.35,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0905\/4509\/4998\/files\/wienerberger-k109-solid-blue-engineering-engineering-brick-pack-of-400-3883138.jpg?v=1772656835"},{"product_id":"wienerberger-k201-perforated-smooth-blue-engineering-brick-pack-of-400","title":"Wienerberger K201 Perforated Smooth Blue Engineering Brick Pack of 400","description":"\u003ch3\u003eWienerberger Staffordshire Smooth Blue Perforated K201 65P Engineering Brick\u003c\/h3\u003e\n\nThis is a perforated, extruded, smooth-face engineering brick designed for both durability and structural function. It offers a strong balance of strength and moisture resistance suited to demanding environments.\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eSize:\u003c\/b\u003e215mm × 102.5mm × 65mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eColour:\u003c\/b\u003eBlue\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTexture:\u003c\/b\u003eSmooth, Perforated Engineering Brick\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWater Absorption:\u003c\/b\u003e? 7%\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDurability:\u003c\/b\u003eF2\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCompressive Strength:\u003c\/b\u003e? 75 N\/mm²\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePack Quantity:\u003c\/b\u003e504\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eActive Soluble Salts:\u003c\/b\u003eS2\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eGross Dry Density:\u003c\/b\u003e~1,800 kg\/m³\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eReaction to Fire:\u003c\/b\u003eClass A1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDescription \u0026amp; Usage Notes\u003c\/h3\u003e The K201 65P engineering brick is made by extrusion and features perforations to reduce weight while maintaining strong structural integrity. With low water absorption (? 7%) and high compressive strength (? 75 N\/mm²), it’s well-suited for structural and moisture-critical applications such as foundations, cavity walls, sewers, or retaining structures.\n\nWhile it can be used above ground, its primary design is for performance over appearance. Using it for visible facades may show variation in shade or finish. To maximize longevity, incorporate optimal detailing like correct mortar, drainage, and flashing.\n\nBecause this is an engineering brick, mix from multiple packs during installation to reduce visual variation. Requesting samples or close-up images before bulk orders helps confirm you’re happy with the tone and texture.\n\n\u003ch3\u003eFAQs\u003c\/h3\u003e \u003ch4\u003eWhat does “perforated” mean in this context?\u003c\/h4\u003e Perforated means the brick has vertical holes (cores) which reduce weight and material without significantly compromising strength. \u003ch4\u003eIs ? 7% water absorption adequate for engineering bricks?\u003c\/h4\u003e Yes — it’s within the standard for Class B engineering bricks, helping to resist moisture ingress in demanding conditions. \u003ch4\u003eCan I use this brick where appearance matters?\u003c\/h4\u003e Yes, you can, but be aware that engineering bricks are designed for performance, not appearance. Expect variation in colour and texture; if aesthetics are critical, a facing brick is usually better\u003cbr\u003e\u003cp\u003eCheck out our full range of \u003ca href=\"https:\/\/jjbuildingmaterials.co.uk\/collections\/building-supplies\"\u003ebuilding supplies\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003eBrowse more \u003ca href=\"https:\/\/jjbuildingmaterials.co.uk\/collections\/bricks-blocks\"\u003ebricks \u0026amp; blocks\u003c\/a\u003e available online.\u003c\/p\u003e","brand":"Weinerberger","offers":[{"title":"Default Title","offer_id":51448303747414,"sku":"161979","price":582.55,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0905\/4509\/4998\/files\/wienerberger-k201-perforated-smooth-blue-engineering-brick-pack-of-400-1151816.jpg?v=1772656832"},{"product_id":"wienerberger-k209-blue-engineering-perforated-engineering-brick","title":"Wienerberger K209 Blue Engineering Perforated Engineering Brick Pack of 400","description":"\u003ch3\u003eWienerberger K209 Blue Perforated Class B 65 mm Engineering Brick\u003c\/h3\u003e\n\u003cp\u003eThe K209 Blue Perforated engineering brick is designed for structural use where strength and low water absorption are critical. Its blue colouring and perforated form deliver a balance of performance and economy. Because engineering bricks focus on technical properties, surface finish and tone variation are typical, so mixing from multiple packs is advisable.\u003c\/p\u003e\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e215mm × 102.5mm × 65mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColour:\u003c\/strong\u003eBlue\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTexture:\u003c\/strong\u003eSmooth, Perforated Engineering Brick\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater Absorption:\u003c\/strong\u003e? 7%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003eF2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompressive Strength:\u003c\/strong\u003e? 75 N\/mm²\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack Quantity:\u003c\/strong\u003e504\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eActive Soluble Salts:\u003c\/strong\u003eS2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGross Dry Density:\u003c\/strong\u003e~1,800 kg\/m³\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReaction to Fire:\u003c\/strong\u003eClass A1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDescription \u0026amp; Usage Notes\u003c\/h3\u003e\n\u003cp\u003eManufactured using the extruded method with vertical perforations, this brick offers reduced weight without compromising core structural performance. Its low absorption (? 7%) and high strength (? 75 N\/mm²) are tailored for demanding structural applications, such as foundations, retaining walls, and load-bearing masonry. Because aesthetics are secondary in engineering bricks, consistency of colour and surface may vary between packs. For facades or visible work, a facing brick is recommended. Use proper detailing—good mortar selection, drainage, flashing, and correct wall design—to ensure long-term durability.\u003c\/p\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003ch4\u003eWhy use a perforated engineering brick rather than a solid one?\u003c\/h4\u003e\n\u003cp\u003ePerforations reduce weight and material usage while retaining strength and load capacity, making the brick more economical for many structural applications.\u003c\/p\u003e\n\u003ch4\u003eIs ? 7% water absorption reliable for structural use?\u003c\/h4\u003e\n\u003cp\u003eYes — for Class B engineering bricks, ? 7% absorption is a standard requirement that helps resist moisture ingress in harsh conditions.\u003c\/p\u003e\n\u003ch4\u003eCan this be used where appearance matters?\u003c\/h4\u003e\n\u003cp\u003eIt can, but keep in mind engineering bricks are produced for performance, not appearance. You may see shading or texture variation. For visual consistency, use a dedicated facing brick.\u003c\/p\u003e\n\u003cp\u003eCheck out our full range of \u003ca href=\"https:\/\/jjbuildingmaterials.co.uk\/collections\/building-supplies\"\u003ebuilding supplies\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eBrowse more \u003ca href=\"https:\/\/jjbuildingmaterials.co.uk\/collections\/bricks-blocks\"\u003ebricks \u0026amp; blocks\u003c\/a\u003e available online.\u003c\/p\u003e","brand":"Weinerberger","offers":[{"title":"Default Title","offer_id":51448303845718,"sku":"161980","price":497.37,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0905\/4509\/4998\/files\/wienerberger-k209-blue-engineering-perforated-engineering-brick-pack-of-400-3171425.jpg?v=1772656831"},{"product_id":"wienerberger-red-class-b-perf-engineering-brick-pack-of-400","title":"Wienerberger Red Class B Perf Engineering Brick Pack of 400","description":"\u003ch3\u003eWienerberger Class B 65 mm Red Perforated Engineering Brick\u003c\/h3\u003e\n\nA robust and high-performance engineering brick, the Wienerberger Class B 65 mm Red Perforated unit is designed for structural, below-DPC, and groundwork applications. Its perforated form improves weight and handling without compromising strength. Unlike facing bricks, this engineering brick is valued for performance — strength, low water uptake, and stability — rather than appearance.\n\nBuilt to perform in the toughest conditions, this brick delivers excellent compressive strength and durability, making it ideal for foundations, retaining walls, sewers, and any masonry work that demands structural integrity.\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eDimensions (L × W × H):\u003c\/b\u003e215 × 102.5 × 65 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePack quantity:\u003c\/b\u003e400 bricks per pack\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eType \/ configuration:\u003c\/b\u003ePerforated, wirecut engineering brick\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCompressive strength:\u003c\/b\u003e? 75 N\/mm² (Class B standard)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWater absorption:\u003c\/b\u003e? 7 %\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDurability designation:\u003c\/b\u003eF2\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eProduction method:\u003c\/b\u003eExtruded \/ wirecut\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eColour:\u003c\/b\u003eRed\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Choose Class B Red Perforated Engineering Brick?\u003c\/h3\u003e\n\nWhen strength and durability matter more than façade aesthetics, this brick is a go-to choice. Its high compressive strength (? 75 N\/mm²) ensures it can handle demanding structural loads, while its low water absorption (? 7 %) reduces the risk of moisture damage and freeze\/thaw stress. As a Class B engineering brick (rather than Class A), it hits a sweet spot for many construction tasks that require performance without the extra cost of ultra-high spec units.\n\nThe perforated design reduces weight, aids mortar keying, and makes handling easier, without undermining structural capacity. This brick is not intended for decorative appearance, but rather for projects where durability, load resistance, and moisture control are critical.\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e \u003ch4\u003eCan I use this engineering brick for visible external walls?\u003c\/h4\u003e You *can*, but it’s not ideal for decorative purposes. Engineering bricks are manufactured for performance, not appearance. Expect variation in texture, colour, and finish. If aesthetics are important, a facing brick is usually preferred. \u003ch4\u003eWhy is perforation used in engineering bricks?\u003c\/h4\u003e Perforations reduce the brick’s weight, improve mortar grip (keying), and help with drying and handling — all without significantly affecting compressive strength when properly designed. \u003ch4\u003eIs “? 7 % water absorption” good for UK conditions?\u003c\/h4\u003e Yes. For an engineering brick, ? 7 % absorption is in line with Class B standards and is considered acceptable for durable, moisture-resilient construction, especially when combined with correct detailing (DPCs, drainage, etc.).\u003cbr\u003e\u003cp\u003eCheck out our full range of \u003ca href=\"https:\/\/jjbuildingmaterials.co.uk\/collections\/building-supplies\"\u003ebuilding supplies\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003eBrowse more \u003ca href=\"https:\/\/jjbuildingmaterials.co.uk\/collections\/bricks-blocks\"\u003ebricks \u0026amp; blocks\u003c\/a\u003e available online.\u003c\/p\u003e","brand":"Weinerberger","offers":[{"title":"Default Title","offer_id":51448312824150,"sku":"162024","price":296.78,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0905\/4509\/4998\/files\/wienerberger-red-class-b-perf-engineering-brick-pack-of-400-3660719.jpg?v=1772656755"}],"url":"https:\/\/jjbuildingmaterials.co.uk\/collections\/engineering-bricks.oembed","provider":"JJ Building Materials","version":"1.0","type":"link"}