Wienerberger K109 Solid Blue Engineering Engineering Brick Pack of 400

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

• Size:215mm × 102.5mm × 65mm
• Colour:Blue
• Texture:Smooth, Solid Engineering Brick
• Water Absorption:? 7%
• Durability:F2
• Compressive Strength:? 75 N/mm²
• Pack Quantity:504
• Active Soluble Salts:S2
• Gross Dry Density:1800 kg/m³
• 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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Roof Tiles & Fittings:

We recommend ordering an additional 10% of roof tiles to allow for any breakages that may occur during delivery or handling. Roof tiles are naturally fragile, and having a few extra on site helps prevent delays and ensures your roofing project can be completed without interruption.