Permarock Mineral Fibre EWI System with Dry Dash

High-performance mineral fibre external wall insulation (EWI) system comprising of non-combustible Euroclass A1 insulation, reinforced base coat and Dry Dash (pebbledash) 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 and 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);
• Any of the comprehensive range of graded dashing stones can be used with any shade of Permarock Dashing Mortar to achieve an attractive ‘pebble dash’ finish;
• 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 our 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 Dry Dash

Permarock Dry Dash provides a tough, durable, long-lasting and cost-effective finish for use with Permarock EWI, PermaRend and Permarock exterior render systems.

Permarock Dry Dash comprises pre-washed and screened Dashing Aggregates which incorporate different types and colours of stones that are blended together and applied onto a specially formulated, self-coloured, polymer-enriched mineral-cement dash receiver, Permarock Dashing Mortar (DM), which provides enhanced performance over traditional sand/cement renders.

Colour Range:

• Permarock Dashing Mortar: 3 standard colours;
• Dashing Stones: 32 standard blends.

Colour Options: Special colours can be produced subject to minimum order quantities.

Number of Textures: 1

Permarock Dashing Mortar is a factory-batched, polymer-modified, self-coloured, cement-based spar dash receiver used to create traditional ‘pebble dash’ render wall surfaces. It is supplied as a pre-coloured mineral dry powder premix, requiring only the addition of water and mixing on site. Permarock Dashing Mortar is used as a decorative finish with Permarock External Wall Insulation Systems and Permarock Exterior Render Systems. It is available in a range of standard colours including Grey, White, Yellow, Cream, Red and Pink. For other colours, please contact Permarock.

Pack size: 25kg sacks.

Storage: Store in closed sacks, off the ground, dry and protected from moisture. Avoid frost.

Approximate coverage rate: 6-8 kg/m²

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.