Wienerberger K109 Blue Solid Class B Engineering Brick
The 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.
Unlike 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.
Key Specifications
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Size:215mm × 102.5mm × 65mm
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Colour:Blue
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Texture:Smooth, Solid Engineering Brick
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Water Absorption:? 7%
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Durability:F2
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Compressive Strength:? 75 N/mm²
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Pack Quantity:504
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Active Soluble Salts:S2
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Gross Dry Density:1800 kg/m³
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Reaction to Fire:Class A1
Description & Usage Notes
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.
Because 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.
FAQs
What makes this a Class B engineering brick?
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.
Why choose a solid engineering brick over perforated?
A solid brick provides maximum strength and reduced water pathways, making it especially suitable for heavy load-bearing or below-ground conditions.
Can this brick be used in visible facades?
It can, but its appearance is secondary to performance. If aesthetics are important, a facing brick would be a better option.
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