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Material Sheet

Cavity Liner Brick

What is it used for

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Residential: Used in the construction of cavity walls in houses to improve thermal insulation and prevent moisture penetration.

Commercial: Employed in commercial buildings to create energy-efficient and moisture-resistant wall systems.

Industrial: Suitable for industrial buildings where enhanced insulation and structural integrity are required.

Brick Wall


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Length: 215 mm

Width: 102.5 mm

Height: 65 mm

Volume: 0.0014324375 m³

Weight: 2.8 kg

What it’s Made From

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The primary material, typically sourced locally, is used for its plasticity and strength after firing.


Essential for shaping and moulding the clay into bricks.


Used to prevent the bricks from sticking to moulds and for creating textured finishes.


These can include materials like manganese, barium, and other colorants to enhance color and durability.


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Red Cavity Liner Brick

Description: A traditional red-colored brick designed to line cavities and provide structural support.

Applications: Used in constructing internal walls, providing a classic aesthetic while ensuring stability and strength.

Buff Cavity Liner Brick

Description: A light yellow to sandy-colored brick that offers a warm, clean appearance for cavity walls.

Applications: Ideal for modern buildings and extensions, enhancing both structural integrity and visual appeal.

Blue Engineering Cavity Liner Brick

Description: Known for its high strength and low water absorption, typically in a dark blue hue.

Applications: Suitable for areas requiring robust support, such as foundations and below ground level constructions, while also providing an aesthetic feature.


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Tools Required:

Trowel | Spirit level | Brick | hammer | Tape measure | Brick jointer

Materials Required:

Cavity liner bricks | Mortar mix | Water | Damp-proof course (DPC) material

Step-by-Step Guide:

  1. Preparation: Clear the area, lay a damp-proof course (DPC).

  2. Mix Mortar: Follow manufacturer’s instructions.

  3. Lay Bricks: Start with a mortar bed, place bricks, check alignment.

  4. Build Up: Lay bricks with mortar in between, ensure each layer is level.

  5. Insulation: Insert insulation in the cavity if needed.

  6. Complete: Fill gaps with mortar, smooth joints, clean excess mortar.

Technical Specification

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Load-Bearing Capacity: Suitable for use in load-bearing walls, providing structural support.

Thermal Properties: Enhances thermal insulation of cavity walls, contributing to energy efficiency.

Acoustic Properties: Offers good sound insulation properties when used in cavity wall construction.

Compliance and Standards: Complies with relevant British Standards (BS EN 771-1) for clay masonry units.


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ISO 9001: Quality management certification.

BS EN 771-1: British Standard for clay masonry units.

CE Marking: Indicates conformity with health, safety, and environmental protection standards for products sold within the European Economic Area (EEA).

Purchasing Quantities

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Single Units

Ideal for small projects, repairs, or when only a few bricks are required.


Available in smaller quantities than pallets, often sold in bundles of 10, 20, or 50 bricks, suitable for minor projects or additions.


Typically offered in bulk, with each pallet containing around 400 to 500 bricks. Suitable for medium to large construction projects.

Environmental Impact

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Sustainability: Clay cavity liner bricks are made from natural materials and can be recycled.

Carbon Footprint: Moderate carbon footprint due to firing process but long-lasting durability offsets environmental impact.

Eco-Friendly Alternatives: Recycled plastic cavity liners or sustainably sourced timber products can be considered as environmentally friendly alternatives.

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