Permarock Mineral Fibre EWI System with Brick Slip Finish - Class A External Wall Insulation System

High-performance mineral fibre external wall insulation (EWI) system comprising of non-combustible Euroclass A1 insulation, reinforced base coat and acrylic brick slip finish. The system achieves Euroclass A2-s1,d0 (EN 13501-1) and is meant for installation above DPC level.

Permarock Mineral Fibre external wall insulation (EWI) systems are fire-safe, high-performance thermal insulation systems suitable for application to new or existing buildings including relevant buildings as defined in the Building Regulations. Systems are suitable for use at any height and in proximity to any boundary.

Features and benefits:

• Suitable for all 'Relevant Buildings' as defined in the Building Regulations, including residential buildings with a storey height above 11 m;
• Excellent fire performance: Non-combustible (Class A1) mineral (stone) fibre insulation - Fire breaks are not required;
• A2-s1,d0 reaction to fire classification (EN 13501-1);
• No restrictions on proximity to boundaries;
• Adhesively bonded and mechanically fixed insulation;
• High resistance to wind loads;
• Mechanically anchored reinforcement layer: Provides enhanced resistance to wind loading and additional structural stability in a fire;
• High impact resistance;
• Low embodied energy;
• Thermal conductivity: 0.036–0.039 W/mK (depending on insulation specified);
• Wide range of brick slip colours and textures available;
• Ecopoints score of 0.10 (m²) - 'Excellent' rating;
• Acoustic benefit over other insulant types;
• Has a working design life of in excess of 30 years;
• No restriction on brick slip colour. Here.

Design considerations:

• U-value calculations can be carried out for each project to determine the thickness of insulation required to achieve particular thermal performance requirements;
• For high-rise buildings, a wind load assessment should be carried out by a suitably qualified structural engineer and the results should be provided to Permarock to enable an optimised fixing arrangement to be provided;
• Contact Permarock to discuss your proposed design to enable us to assist you in specifying the correct system and component parts;
• Further information can be obtained from Permarock's Technical Hub

Beads and trims:

• A full range of beads, trims, profiles and seals is available to enable the system to be interfaced with other building elements.

Permarock Mineral Fibre Insulation boards are dual-density, non-combustible thermal insulation boards used as the insulation layer within Permarock Mineral Fibre external wall insulation systems.

The Permarock Mineral Fibre insulation is adhesively bonded and mechanically fixed and can be applied onto walls of dense or no-fines concrete, brickwork, blockwork, or suitably sheathed light steel frame or timber frame construction, in any geographical location including those classified as having very severe exposure to wind-driven rain.

The Permarock Mineral Fibre Insulation boards carry full accreditation in accordance with our KIWA BDA Agrément certificate.

Advantages:

• Non-combustible - Class A1 (BS EN 13501-1);
• Dimensionally stable;
• Stable thermal performance using entrapped air - will not deteriorate;
• Superior acoustic performance compared with rigid foam insulants;
• Low embodied energy;
• High water vapour permeability - allows walls to 'breathe'.

Technical Data:

• Fire Behaviour: A1;
• Standard dimensions (mm): 1200 x 600;
• Standard thicknesses (mm): 50 - 250 mm in 10 mm increments;
• Thermal conductivity: 0.036 W/m²K;
• Reaction to fire: Class A1 (BS EN 13501-1) - non-combustible;
• Tensile strength: TR10 (BS EN 13162:2012 + A1:2015);
• Colour: yellow-green.

Permarock Mineral Fibre DD Insulation has a high density outer face (to receive the render system) and a lower density backing.

Permarock Adhesive should be applied to the back face (lower density) to enable bonding to substrate (brickwork, blockwork and dense or no-fines concrete and other uneven surfaces). The lower density material will accommodate slight imperfections in the surface of the building fabric.

Permarock Lamella Adhesive is used for bonding to smooth mineral substrates, such as sheathing boards.

In addition to adhesive bonding, Permarock Mineral Fibre Insulation boards must also be mechanically fixed using suitable Permarock approved fixings.

Permarock Brick Slips are a lightweight, flexible and breathable synthetic resin tile used to replicate brick or stonework with the ability to create unique and interesting facade designs that are durable, robust and impact-resistant.

Manufactured from high-quality raw materials, Permarock Brick Slips are, as standard, supplied as facing and corner (pistol) brick slips in a range of 12 standard colours and 3 textures: Special colours, textures, sizes and shapes can be manufactured to order (minimum order quantities).

The Brick Slip Adhesive used to fix the slips is available in three standard colours (cement-grey, sandwhite and dark grey). The joints are pointed using Permarock Pointing Mortar (cement-grey) - other colours are available subject to minimum order quantities.

Permarock Brick Slips are assessed to EN 13501-1 and when used as the decorative finish of a Permarock Mineral Fibre EWI system, the system achieves an A2-s1-d0 classification and is suitable for use on buildings of any height, including those with a storey height above 11 m, and in proximity to any boundary without restriction.

Colour Range: 12 colours with colour matching available, subject to minimum order quantities.

The Permarock Brick Slips come in three distinct textures; flat, textured and sand particles.

Sizes / Coverage:

• Flat facing bricks: 215mm x 65mm x 4-6mm thick;
• Corner facing bricks: 215mm x 102mm x 65mm x 4-6mm thick;
• Approx. 58 slips (215mm x 65mm) per m²;

Weight: 5 – 6 kg/m²

Coverage Rates:

• Permarock Brick Slip Adhesive: approx. 3 - 4 kg/m²;
• Permarock Pointing Mortar: approx. 3 - 5 kg/m²;
• Permarock Brick Facings (UK Brick Size – 215mm x 65mm): Each full box of facings contains 174 pieces, sufficient to cover approximately 3m² of wall surface;
• Permarock Brick Corners (UK Brick Size – 215mm x 102.5mm x 65mm): Each full box of brick corners contains 40 pieces, sufficient for approximately 3 metres of external corner.

Lime Bloom: Lime bloom manifests itself as a lightening of colour caused by the formation of a fine surface deposit of calcium carbonate on cement-based renders. Lime bloom can occur as an overall lightening of the render colour, or as heavier deposits, sometimes uniformly distributed across the surface, sometimes patchy in appearance. Colour variations tend to be more obvious when lime bloom occurs on uniformly coloured or darker coloured renders.

Lime bloom is a naturally occurring phenomenon, is purely superficial and has no detrimental effect on the durability, strength or performance of the render - it cannot therefore be deemed a technical failure in any respect.

Further information on lime bloom, its causes, and mitigation measures can be found in Permarock technical Bulletin TB008.