Permarock EPS-Premium EWI System with Dry Dash

High-performance, lightweight external wall insulation (EWI) system based on enhanced expanded polystyrene (EPS) insulation incorporating microscopic graphite particles to improve thermal performance and dissipate heat. Permarock EPS-Premium insulation contains a flame-retardant additive (FRA) for improved fire resistance performance.

System scope and compliance:

• PAS 2035 compliant.
• BIM Level 2 compliant.
• BAW-24-333-S-A-UK certified system.
• Can assist in achieving Code for Sustainable Homes Levels 4–6 and Passivhaus standards.

Building height and exposure:

• Suitable for buildings up to 11 metres in height.
• Non-combustible fire breaks should be introduced at each floor level above the second floor, in accordance with Building Control requirements.

Fire performance:

• Achieves B-s2,d0 classification in accordance with BS EN 13501-1 when incorporating Permarock Dry Dash Finish.

Thermal performance:

• High thermal performance insulation incorporating a graphite additive, providing improved performance over standard (white) EPS.
• Low U-values possible – insulation thicknesses up to 300 mm allow flexibility in meeting thermal requirements.

 Insulation specification:

• Permarock EPS-Premium Insulation.
• Insulation thicknesses available from 20 mm up to 300 mm.
• Declared thermal conductivity of 0.030 W/mK;
• Size of boards: 1200 mm x 600 mm x thickness
• Fire Classification: Class B-s1,d0 /B-s2,d0 (EN 13501-1);
• Method of fixing: Adhesive bonding with mechanical fixings;
• Adhesive: Polymer-modified cement-based adhesive. Minimum 40% adhesive contact area (Ribbon pattern);
• Environmental: Zero ozone depletion potential (zODP) and low Global Warming Potential (low GWP), Green Guide A+;
• Low water absorption.

Protection for the insulation:

EPS boards that have been applied to wall surfaces should be protected/shielded from direct sunlight to avoid excessive thermal gains. Boards that have been exposed to prolonged UV may exhibit deterioration of the outer surface layer (e.g. surface discolouration, surface crazing, friability): All such damage must be removed by rasping/sanding back to sound unaffected material: The use of vacuum extraction when rasping is recommended.

Fire Barrier Insulation:

• is required if the building is adjoined to other structures. However, if there are internal fire compartmentation requirements within the building, these should be confirmed by the Architect.

Ancillary Items:

• Permarock Dubbing-out Compound;
• Permarock Profile Fixings;
• Permarock Distance Spacers – various sizes available;
• Permarock Sealing tapes;
• Permarock Starter track H-connectors;
• Permarock Silicone Sealant;
• Permarock Expanding PU-Foam;
• External fixture mounting blocks (if necessary): Permarock ACC/FIX mounting disks, cylinders, blocks, etc. Thermally broken supports enabling the attachment of external fixings and fixtures to/through EWI systems to masonry walls.     

Airtightness and permeability:

• Low air permeability.
• Can assist in improving overall building airtightness.

Structural performance:

• Lightweight system;
• Adhesively bonded and mechanically fixed insulation;
• High resistance to wind loads.

Environmental & Quality Standards

• Low U-Values are achievable in order to meet or exceed BREEAM, Passivhaus, EnerPHit and similar performance standards;
• The system is manufactured and supplied in accordance with BS EN ISO 9001 (Quality Management) and BS EN ISO14001 (Environmental Management);
• EPS-Premium insulation is manufactured to EN 13163 and is CFC and HCFC free;
• The insulation has zero Ozone Depletion Potential (zero-ODP) and low global warming potential (GWP) of less than five;
• Recycling facility for uncontaminated insulation boards is available for site waste;
• Green Guide to Specification A+ Rating achievable;
• Extremely airtight façades can be achieved.

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.