Summary
Rendered insulated external Wall System 2, comprising mechanically-fixed enhanced expanded polystyrene (grey EPS) insulation boards, with a reinforced basecoat and render finishes.
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Application
It is suitable for use on the outside of external masonry walls in new and existing domestic and nondomestic buildings.
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Description
Retrofit or new build application of external facade insulated render system used to provide a thermal upgrade and protection of the fabric of the building.
The Benx Wall System 2 (Mineral) consists of grey EPS enhanced expanded polystyrene insulation boards, which are mechanically fixed to the substrate wall, together with reinforcing glassfibre mesh embedded in the basecoat and finish coats.
Once all the insulation boards have been secured to the wall with the mechanical fixings, the first layer of basecoat is applied to their surface to a uniform thickness and a single layer of the reinforcing mesh is immediately embedded (with its concave surface to the wall) and the surface smoothed with a trowel.
An additional layer of basecoat is applied, as required, over the reinforced basecoat to achieve the nominal thickness. The system is left to dry before the primer is applied, where required, followed by the finishing coat.
Features and benefits:
- All systems incorporate a polymer modified basecoat applied 4–8 mm-thick incorporating a plastic coated reinforcing glass fibre mesh.
- Wide range of top coats available.
- Thermally Enhanced Grey EPS insulation.
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Finish
Textured, Dry dash, Silicone, Acrylic, Brick
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Material
Expanded polystyrene (EPS)
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Warranty description
Ten year, 25 year
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Specification
Classification data
Support rails and brackets
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Boards
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Material
Insulation board.
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Fixings
Ejot NT U., Ejot STR U., Ejot H3., TFIX-8S., TFIX-8M., KI-10.
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Insulation
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Material
Mineral wool slabs, 30–200 mm thick., Grey expanded polystyrene (EPS) boards, 30–200 mm thick., Phenolic foam boards, 20–120 mm thick.
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Adhesive
Envirobed adhesive.
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Additional mechanical fixings
Exact type and length to be determined by system and substrate.
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Fire barriers and stops
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Material
Mineral wool fire break., Not required.
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Fixings
For application to second storey walls and above, it is recommended that the designer considers at least one stainless steel fixing per m2 and fire barriers in line with compartment walls and floors as advised in BRE Report BR 135 :2013.
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Beads and trims
Not required., Powder-coated galvanized steel with PVC nose., Stainless steel variant., PVC clip-on starter track beads., Window frame seal beads., Stop beads.
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Movement joints
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Form with
Movement joints (V and E version).
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Sealant
Designers and installers should take particular care in detailing around openings, penetrations and movement joints to minimize the risk of water ingress.
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Accessories
Generally, movement joints are not required in the system but, if an expansion joint is already incorporated in the substrate, a movement joint must be made through the insulation system.
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Render carrier or reinforcement
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Material
Retrobase base coat/ glassfibre reinforcement mesh.
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Mesh size
Manufacturer's standard.
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Render
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Application
Finish coat.
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Material
Envirobrick simulated brick finish., SpeedySlip acrylic brick slips., Brickstick real brick finish., PanelBrick real brick panel finish.
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Decorative finish
Brick.
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Protective coating
Not required., NanoSil equalizing finish.
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Sustainability data
Material
Expanded polystyrene (EPS)
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