Wall System 2 - Direct To Masonry External Wall Insulation System - External Wall Insulation System
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EnviroCryl grained acrylic finish
EnviroCryl grained acrylic finish
Wall System 2 (Mineral), comprising mechanically-fixed enhanced expanded polystyrene (EPS) insulation boards, with a reinforced basecoat and render finishes.
Application
It is suitable for use on the outside of external masonry walls in new and existing domestic and nondomestic buildings.
Description
Wall System 2 (Mineral) consists of 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.
General information
Finish | Textured Dry dash Silicone Acrylic Brick |
Material | Expanded polystyrene (EPS) |
Warranty description | Ten year 25 year Guidance for specification option: PAS 2035 warranty. |
Uniclass | |
CAWS | M21/210 External wall insulation system M21/20 External wall insulation system . . . . . . |
Specification data - External wall insulation systems
Preparation | Manufacturer guidanceWeather conditions should be monitored to ensure correct application and curing conditions. Application of coating materials must not be carried out at temperatures below 5°C or above 30°C, nor if exposure to frost is likely, and the coating must be protected from rapid drying. Installation should not take place during rainfall or if rain is anticipated. In addition, cementitious-based renders must not be applied if the temperature will fall below 0°C within 72 hours of completion. The planarity of the substrate must be checked, and any protrusions exceeding 10 mm removed. The primer should be used as required and appropriately selected for the type of finish coat used. All rendering should be in accordance with the relevant recommendations of BS EN 13914-1 : 2005. |
Support rails and brackets | |
Boards | |
Material | Insulation board. |
Fixings | Ejot NT U.Ejot STR U.Ejot H3.TFIX-8S.TFIX-8M.KI-10. |
Insulation | |
Material | Mineral wool slabs, 30–200 mm thick.Guidance for specification option: Insert thickness required. High density and compressive strength mineral wool, lambda: 0.036–0.040 W/m·K. Non-combustible; environmentally friendly; thermo-dimensionally stable. Expanded polystyrene (EPS) boards, 30–200 mm thick.Guidance for specification option: Insert thickness required. Age cured fire-retardant polystyrene, lambda: 0.032–0.037 W/m·K. Phenolic foam boards, 20–120 mm thick.Guidance for specification option: Insert thickness required. Lambda: 0.021–0.024 W/m·K. CFC and HCFC free; excellent thermal performance and good fire performance. Manufacturer guidanceTypical board size: 1200 x 600 mm, with no cut boards of less than 200 mm-wide to be used. |
Adhesive | Envirobed adhesive. |
Additional mechanical fixings | Exact type and length to be determined by system and substrate.Guidance for specification option: 60 mm head minimum embedment 35 mm. Consult manufacturer's technical department for advice. |
Fire barriers and stops | |
Material | Mineral wool fire break.Guidance for specification option: Expanded polystyrene (EPS) or phenolic insulation only. Not required.Guidance for specification option: Mineral wool insulation only. |
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. |
Beads and trims | Not required.Powder-coated galvanized steel with PVC nose.Guidance for specification option: Standard. Available in 2500 or 3000 mm length. Consult manufacturer for details including fixing requirements. Stainless steel variant.Guidance for specification option: Consult manufacturer for details. PVC clip-on starter track beads.Window frame seal beads.Stop beads. |
Movement joints | |
Form with | Movement joints (V and E version). |
Sealant | Designers and installers should take particular care in detailing around openings, penetrations and movement joints to minimize the risk of water ingress. |
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. |
Render carrier or reinforcement | |
Material | Retrobase base coat/ glassfibre reinforcement mesh.Guidance for specification option: Retrobase: Polymer modified cementitious base coat applied 4–8 mm-thick incorporating a plastic coated reinforcing glass fibre mesh. Mesh overlapped 100 mm. Extra patches at doors and windows. |
Mesh size | Manufacturer's standard. |
Render | |
Application | Finish coat.Guidance for specification option: Note that base coat is Retrocoat irrespective of finish coat specified. |
Material | EnviroCryl grained acrylic finish. |
Decorative finish | Textured, standard. |
Colour | Manufacturer guidanceWide range of options, dependent on finish specified; consult manufacturer and insert requirements. |
Protective coating | Not required.NanoSil equalizing finish.Guidance for specification option: Not required for some finishes; consult manufacturer for details. |
Literature
SPS ENVIROWALL — WALL SYSTEM 2 (MINERAL)
SPSenvirowall Brick Finishes Brochure
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