Masonry Mineral Wool Clay Brick Slips

System Build-Up

Layer-by-layer system specification

This is Licata's EWI system for masonry substrates combining non-combustible mineral wool insulation with an authentic clay brick slip finish. The system delivers enhanced fire performance alongside the traditional appearance of real brickwork. Licata supplies the complete system from a single source.

Raso Top 800 is used as both the insulation adhesive and the reinforced basecoat. Super S1, Licata's S1-rated flexible tile adhesive, bonds the clay brick slips to the cured basecoat, providing the flexibility required to accommodate thermal movement without cracking or debonding.

Masonry Mineral Wool Clay Brick Slips System Build-Up

System Layers

Products

Layer 1: Substrate

Brick or Block Masonry

Existing or new masonry substrate in brick or block. Must be structurally sound, clean and free from contamination, organic growth, loose render or paint. Any defects or voids should be repaired before insulation is fixed.

Layer 2: Insulation Adhesive

Raso Top 800

Polymer-modified cementitious adhesive, applied to the rear of the mineral wool board using the dot-and-dab or full-bed method to bond the insulation to the masonry substrate.

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Layer 3: Insulation

Mineral Wool Insulation Board

Non-combustible mineral wool insulation boards, thickness specified by U-value calculation. Fixed using Raso Top 800 adhesive and mechanically secured with EWI fixings. Boards staggered at joints with no gaps.

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Layer 4: Mechanical Fix

Insulation Fixing

Mechanical EWI fixings, installed through the insulation board into the masonry substrate. Fixing type and density determined by pull-out testing and wind load calculations. Must be flush with or counter-sunk below the board face.

Layer 5: Basecoat

Raso Top 800

Polymer-modified basecoat, applied over the insulation boards in two passes to encapsulate the fibreglass mesh. First pass embeds the mesh, second pass covers it fully. Minimum total thickness 4 to 6mm. Allow to cure fully before applying brick slip adhesive.

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Layer 6: Reinforcement

Fibreglass Mesh

Alkali-resistant fibreglass reinforcement mesh, embedded into the first pass of Raso Top 800 basecoat. Minimum 100mm laps at all joints. Additional diagonal mesh at all openings to prevent corner cracking.

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Layer 7: Brick Slip Adhesive

Super S1

S1-rated highly flexible cementitious tile adhesive, bonding the clay brick slips to the cured Raso Top 800 basecoat. The S1 deformability classification provides the flexibility required to accommodate thermal movement in the EWI system without cracking or debonding.

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Layer 8: Finish

Clay Brick Slips

Clay brick slips are authentic clay brick-faced tiles bonded to the EWI basecoat. Deliver the genuine appearance of traditional brickwork with a fraction of the weight. Available in a wide range of brick colours and textures.

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Layer 9: Jointing

Pointing Mortar

Pointing mortar, applied to all joints between the clay brick slips on completion of the brick slip installation. Colour matched to the brick slip selection. Applied by hand or grout bag and finished flush or raked as specified.

Benefits

Benefits of Masonry Mineral Wool Clay Brick Slips

Non-Combustible Insulation

Mineral wool is non-combustible, delivering enhanced fire performance and meeting the requirements of projects where A2 or better reaction to fire is specified.

Authentic Brick Appearance

Clay brick slips deliver the genuine look and texture of traditional brickwork, ideal where planning requirements or design codes demand a real brick finish.

Flexible S1 Adhesive

Super S1 brick slip adhesive accommodates thermal movement in the EWI system, preventing cracking and debonding that can occur with rigid adhesives on insulated substrates.

Single Source Supply

Licata supplies the complete system of insulation, fixings, mesh, adhesive, basecoat, primer and render, simplifying procurement and ensuring full system compatibility.

Technical Information

System certification and performance

Certification

BAW-23-284-S-A-UK

Fire Performance

Impact Resistance

Category I

NBS Source View this system specification on NBS Source

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This system has been assessed and certified. The certification number, fire classification and impact resistance category are declared for the complete system as installed. U-value calculations are produced on a project-specific basis.

Fire performance is classified to BS EN 13501-1. Impact resistance Category I indicates suitability for areas readily accessible at ground level and exposed to normal hard-body impacts.

For project-specific technical support including U-value calculations, condensation risk analysis and NBS specification clauses, contact our technical team.

Products in This System

Full system, supplied by Licata

Raso Top 800

Adhesive and basecoat. Layer 2 and Layer 5.

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Mineral Wool Insulation Board

Non-combustible. Supplied in the required thickness for the specified U-value.

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Insulation Fixings

Type and quantity by pull-out testing and wind load calculations.

Fibreglass Mesh

Alkali-resistant reinforcement mesh embedded into the basecoat.

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Super S1

S1 flexible tile adhesive. Bonds clay brick slips to the EWI basecoat.

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Clay Brick Slips

Authentic clay brick-faced tiles. Wide range of colours and textures.

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Downloads

System documentation

Brochure

EWI Systems Brochure

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Certificate

KIWA BDA Agrément®

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Generic Specification

Generic Specification for Masonry Mineral Wool Clay Brick Slips

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Specify this EWI system

Contact our technical team for U-value calculations, NBS specification clauses, product quantities and full system documentation.

Contact Technical Team All EWI Systems