Timber Frame Cavity Rail Carrier Board Silicone Render A2 Rated Render Carrier Board System - Carrier Board System
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Render carrier board system incorporating a range of components including A1 non-combustible carrier board and a highly flexible and weather resistant silicone render finish.
Application
Suitable for a range of projects including retrofit, remediation, high-rise buildings, and new build.
Description
Carrier board system for timber frame substrates. 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.
The A1 Wetherby Carrier Board can be fixed to either metal Wetherby cavity rails or timber battens to create a protective cavity behind the non-combustible board.
Features and benefits:
- Durable and aesthetically pleasing.
- Space-saving (using the minimum 15 mm Wetherby Cavity Rail means the full system is less than 40 mm in depth).
- Easy to install.
- Fire classification: A2-s1, d0 to EN 13501-1.
- Design life: 30 years.
- Impact resistance: Category I.
- Hygrothermal/ freeze/ thaw testing: Pass.
- 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.
- KIWA BDA certified.
General information
Color | White Grey Blue Green Red |
Finish | Silicone Grained Textured Trowelled |
Material | Silicone Aluminium Render Timber Fibre cement |
Shape | Other |
Length | Bespoke |
Width | Bespoke |
Height | Bespoke |
Warranty description | Ten year 25 year |
Uniclass | |
CAWS | M20/160 Proprietary cement gauged render M20/19 Proprietary cement gauged render |
Specification data - Multicoat render systems
Classification data | |
System performance | Durability - 30 years; fire performance to EN 13501-1, Class A2-s1, d0. |
Standard | To BS EN 13914-1. |
First undercoat | HECK K+A scrim adhesive. Guidance for specification option: Mineral-based, bonding and reinforcing basecoat. |
Second undercoat | HECK UG universal primer. Guidance for specification option: Polymer-modified primer comprising pigments and quartz grits. |
Final coat | 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. Available in a wide range of colours; including RAL and NCS. Consult manufacturer for more details and insert requirements. |
Beads | Render beads. Manufacturer guidanceConsult manufacturer and insert requirements. |
Sealant movement joints | |
Beads | 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. STS ISA462. Guidance for specification option: STS ISA462 is a high performance, professional quality, one part ready to use fire sealant and adhesive. Consult manufacturer's literature for more details. |
Fixing method | 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 to create a cavity. 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. Galvanized steel top-hat rail section to create a cavity. |
Mechanical fixings | R-QCP. Guidance for specification option: Hardened screws. Ejot LS range. Guidance for specification option: Case hardened, carbon steel self-drilling screws. 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. |
Sheathing board | To BS EN 12467, fibre cement board. To BS EN 12467, cement particle board (CPB). To BS EN 313-1, plywood. To BS EN 313-1, oriented strand board (OSB). |
Carrier board | To BS EN 12467, fibre cement board. Guidance for specification option: Kemwell, Knauf and STS boards available. Consult manufacturer for details. Manufacturer guidance2400 x 1200 x 12 mm. A1 certified. |
Board fixings | Ejot SH3-STS. Guidance for specification option: Stainless steel 304. For use with timber battens. Ejot JT3-STS-2-6.0. Guidance for specification option: Stainless steel 304. For use with spacer rails. Ejot JT4-STS-3.4-4.8. Guidance for specification option: Stainless steel 304. For use with spacer rails. 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. |
Reinforcement layer (render carrier) | 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. |
Material | Tenmat FF 102/50 Intumescent Strip. Tenmat NVFB Non-Ventilated Fire Barrier. |
Impact resistance | Category I. |
Sustainability data
Contains Red List materials | No |
Material | Silicone Aluminium Render Timber Fibre cement Plywood Oriented strand board (OSB) Fiber-glass Fibre-reinforced Silicon |
Expected Life | 30 year 60 year |
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