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Steel Frame Cavity Rail Stone Wool Silicone Render A2 Rated External Wall Insulation System - External Wall Insulation System
Verified by manufacturer 10 hours ago
External wall insulation system incorporating a range of components including A1 non-combustible stone wool insulation and a highly flexible and weather resistant silicone render finish.
Application
Suitable for a range of projects, including substrates requiring a drainage cavity on retrofit, remediation, high-rise buildings, and new build projects.
Description
External wall insulation system for steel frame substrates, incorporating an A1 non-combustible stone wool insulation board, this system achieves a system fire classification of A2-s1,d0 to BS EN 13501-1, allowing it to be used on a building of any height.
Engineered to excel in the UK climate, it has a silicone render finish coat. The Wetherby RagRail helps to simplify the installation of this system and provide a partially ventilated cavity.
Features and benefits:
- Small drainage holes in the base track allow moisture to escape from the system.
- Durable and long lasting.
- Flexible finish.
- Fire classification: A2-s1, d0 to EN 13501-1.
- Design life: 30 years, 60 year option available.
- Impact resistance: Category I.
- Hygrothermal/ freeze/ thaw testing: Pass.
- Stone wool thermal conductivity: 0.036 W/mK.
- Insulation thicknesses available: 60–250 mm.
- Finish options: silicone render available in a variety of finishes, each with a range of colours.
- Rapid rainproof status.
- High humidity resistance.
- Algae and mould prevention.
- BBA certified.
General information
Color | White Grey Blue Green Red |
Finish | Silicone Grained Textured Cement Trowelled |
Material | Silicone Mineral wool Stone wool Aluminium Render |
Shape | Other |
Length | Bespoke |
Width | Bespoke |
Height | Bespoke |
Warranty description | Ten year 25 year |
Uniclass | |
CAWS | M21/20 External wall insulation systems M21/210 Rendered external wall insulation systems |
Specification data - External wall insulation systems
Classification data | |
System performance | Durability - 30 years; fire performance to EN 13501-1, Class A2-s1, d0. Durability - 60 years; fire performance to EN 13501-1, Class A2-s1, d0. Guidance for specification option: The system’s service life can be extended to 60 years provided a planned inspection and maintenance programme is introduced. An extended 60 years service life also requires the use of certain components - consult manufacturer for details. |
Support rails and brackets | |
Fixing method | |
Material | Wetherby aluminium base rail with treated timber battens. Guidance for specification option: 2.5 m long aluminium base rail for fixing to the sheathing board. Treated timber battens (minimum dry strength grade C16 in accordance with BS EN 14081-1:2016). Wetherby aluminium base rail with RagRail steel spacer rails. Guidance for specification option: 2.5 m long aluminium base rail for fixing to the sheathing board. Epsitec spacer rail, galvanized steel top-hat rail sections. |
Bracket fixings | Ejot LS range. Guidance for specification option: Case hardened, carbon steel, self-drilling screws. |
Boards | |
Material | To BS EN 12467, fibre cement board. To BS EN 12467, cement particle board (CPB). To BS EN 313-1, plywood. To BS EN 300, oriented strand board (OSB). |
Fixings | Ejot JT2-D6 range. Guidance for specification option: Case hardened steel fastener. Ejot JT3-D6-H range. Guidance for specification option: Stainless steel bi-met high thread fastener. Other. Guidance for specification option: Other fixings may be used provided they can be demonstrated to have equal or higher pull-out, plate diameter and plate stiffness characteristics. Consult manufacturer for details. |
Insulation | |
Material | Wetherby stone wool insulation. Guidance for specification option: Rockwool External Wall Dual Density Slab. Thermal performance ranging from 0.030 Wm²/K. Thicknesses between 60–250 mm (in 10 mm increments).
|
Additional mechanical fixings | Ejot TKR range. Guidance for specification option: Self-drilling. Case hardened countersunk carbon steel fastener. Ejot TKE range. Guidance for specification option: Stainless steel countersunk bi-met. KC insulation washers. Guidance for specification option: Insulation washer with integral cap suitable for attachment of insulation layers to wooden and sheet metal substrates. Other. Guidance for specification option: Other fixings may be used provided they can be demonstrated to have equal or higher pull-out, plate diameter and plate stiffness characteristics. Consult manufacturer for details. |
Fire barriers and stops | |
Material | Tenmat FF 102/50 Intumescent Strip. Tenmat NVFB Non-Ventilated Fire Barrier. |
Beads and trims | Render beads. Manufacturer guidanceConsult manufacturer and insert requirements. |
Movement joints | |
Form with | Render beads. Guidance for specification option: Consult manufacturer and insert requirements. |
Sealant | Arbosil LMS. Guidance for specification option: Arbosil LMS is a one-part neutral cure silicon sealant which cures on exposure to moisture vapour to form an elastic silicone rubber. Available in a range of colours; consult manufacturer's literature for more details. Nullifire FS703. Guidance for specification option: FS703 is a low modulus, neutral cure, silicone sealant, suitable for linear gaps sealing in order to reinstate the fire performance in compartment walls and floors. Available in white as standard and black and grey upon request (may be subject to minimum order quantities). Consult manufacturer's literature for more details. |
Render carrier or reinforcement | |
Material | Alkali resistant reinforcing scrim cloth (R 131 A101). Guidance for specification option: Alkali-resistant glass fibre mesh. Nominal weight of 160 g/m². |
Mesh size | 3.5 x 3.8 mm. Guidance for specification option: Supplied in 50 x 1 m rolls and available in 1.1 and 0.5 mm thickness. Insert requirements. |
Fixings | Ejot TKR range. Guidance for specification option: Self-drilling. Case hardened countersunk carbon steel fastener. Ejot TKE range. Guidance for specification option: Stainless steel countersunk bi-met. Other. Guidance for specification option: Other fixings may be used provided they can be demonstrated to have equal or higher pull-out, plate diameter and plate stiffness characteristics. Consult manufacturer for details. |
Render | |
Application | Finish coat. |
Material | HECK SHP 4S silicone resin render. Guidance for specification option: Silicone-modified render comprising mineral fillers, conforming to BS EN 15824 with a 1.5–3 mm grain size. |
Decorative finish | Textured, 1.5 mm grain size. Textured, 2 mm grain size. Textured, 3 mm grain size. |
Colour | Manufacturer guidanceAvailable in a wide range of colours; including RAL and NCS. Consult manufacturer for more details and insert requirements. |
System accessories | Manufacturer guidanceConsult manufacturer for details and insert requirements. |
Primer | HECK UG universal primer. Guidance for specification option: Polymer-modified primer comprising pigments and quartz grits. |
Scrim adhesive | HECK K+A scrim adhesive. Guidance for specification option: Mineral-based, bonding and reinforcing basecoat. |
Impact resistance | Category I. |
Sustainability data
Contains Red List materials | No |
Country of material origin | Europe |
Country of product manufacture | Europe |
Manufacturing plant location | |
Material | Silicone Mineral wool Stone wool Aluminium Render Steel Fibre cement Plywood Oriented strand board (OSB) Fiber-glass Fibre-reinforced Mineral board Mineral fibre Rock fibre Rock fibre mineral wool Rock mineral fibre Rock mineral wool Silicon Stonewool Cementitious Stainless steel |
Expected Life | 30 year 60 year |
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