U Value Calculator
Colour Picker
Find an Installer
Contact Us
Call icon 01942 717 100
  • Search
  • Email
Superior Product Quality

Experience the best in SWI products.

Flexible Partnership

Adapting to your needs at every stage.

Industry Leadership

40+ years in the EWI industry

Timber Frame Cavity Rail Stone Wool Silicone Render System

The Wetherby Stone Wool Silicone Render Cavity Rail system is an ideal solution for timber frame substrates requiring a drainage cavity between the sheathed timber frame and insulation. 

The cavity is ‘partially ventilated’ meaning the effect on the through wall U-value is minimal, with small drainage holes in the base track allowing any moisture to escape from the system. New build insurers such as the NHBC, Premier Guarantee and LABC insist on a cavity on new build projects, making the Wetherby Cavity Rail system an ideal solution.

The unique Wetherby RagRail helps to simplify the installation of this
system and combined with the Stone Wool and Silicone Render system, achieves an A2-s1,d0 fire rating to BS EN 13501-1.

The Wetherby Silicone Render is available in a wide range of colours, making it an ideal choice for designers seeking a high impact and durable finish.


Watch the Stone Wool Silicone Render System in Action…

You’ll unearth a treasure trove of expertise right at your fingertips by visiting our channel and hitting that subscribe button.

Colour Availability

Our Stone Wool Silicone Render System is available in various colours across Silicone, Acrylic, Four Seasons, and Mineral Render. With a variety of vibrant and durable options, our silicone renders are designed to enhance the aesthetic appeal and longevity of your projects. Discover our extensive colour range by downloading our brochure below.

0500n ncs
0500N
1000N
1050R90B
3040B50G
2050Y90R
1030Y20R

Colour Card

Download Thin Coat Render Colour Selection

Download

Wetherby Stone Wool Silicone Render System Components

Benefits of our Stone Wool Silicone Render System

The Stone Wool Silicone Render system is a revolutionary solution, designed to elevate your projects. This advanced insulation system provides many benefits going beyond traditional methods, offering unmatched performance, sustainability, and cost-effectiveness.

Available in a Variety of Colours
Durable and Long Lasting
Flexible Finish
A2 Fire Rating
Heck 4 Season Application

Silicone Render Brochure

Download Our Thin Coat Render Brochure

Download

Technical Information

Specifying an External Wall Insulation system that is suitable for your project can be a challenging practice. Our technical team are on hand to provide detailed job specific specifications and any technical assistance you may require.

Fire ClassificationA2-s1, d0 to EN 13501-1
Design Life30 years
60 years
Impact ResistanceCategory I
Hygrothermal / Freeze / Thaw TestingPass
Sheathing BoardFibre Cement Board (BS EN 12467)
CPB (BS EN 12467 / BS EN 634-2)
Ply (BS EN 313-1)
OSB (BS EN 313-1)
Cavity OptionsWBS RagRail – Metal Cavity Spacer Rail
Timber Batten
Stone Wool Thermal Values Conductivity0.036 W/(m²k)
Thicknesses Available60mm – 250mm
Finish OptionsSilicone Render available in a wide range of colours
The information contained within this website is intended for general guidance only.  To obtain the most accurate and up-to-date design solutions tailored to your specific needs, please contact the Wetherby team directly. 
Technical Data

Technical Drawing Set

Our technical drawings are currently being updated. To request the latest version contact; Technical Helpline 0800 1073299 or technical@wbs-ltd.co.uk

Operations & Maintenance Manual

Our O&M manuals are currently being updated. To request the latest version contact; Technical Helpline 0800 1073299 or technical@wbs-ltd.co.uk

BBA-Certificate-09-4625-PS4

Product Information

At the core of our Stone Wool Silicone Render system lies Rockwool insulation, providing outstanding thermal performance, unparalleled breathability and superior acoustic properties in comparison with other insulants on the market. Stone Wool is classified as A1 non-combustible as an individual product.

  • Outstanding thermal and acoustic properties
  • Non combustible
  • Easily cut and shaped
  • Can be installed to flat & curved surfaces
  • Open cell structure allows the façade to breath

Wetherby Four Seasons (4S) Silicone Render confidently tackles the UK climate’s challenges, excelling in lower temperatures. It creates a formidable shield against rain damage, reducing wash-offs significantly. With a myriad of additional benefits, it stands as the premier choice for enduring performance in any weather condition.

  • Rapid rainproof status
  • High humidity resistance
  • Algae and mold prevention
  • Wide application range
  • Exceptional water-repellent qualities
  • Extended application window

Case Studies

Browse our gallery below for all of our Stone Wool Silicone Render System projects.

wetherby modular facade

Williams Lane, Newark (Modular)

Read More
Haygrove school

Haygrove School (Modular)

Read More
wetherby modular facade

Carrickfergus, Belfast

Read More

Space, Modular

Read More

Contact the Team at Wetherby Building Systems

We understand that embarking on a construction project is a significant endeavor, and we’re here to support you every step of the way.

If you have any inquiries, require additional information, or would like to discuss your specific project needs, please don’t hesitate to reach out. Our dedicated team of experts is ready to listen, collaborate, and provide tailored solutions.

ENQUIRY FORM

    I would like to receive news and updates from Wetherby Building Systems Ltd.

    We will only contact you in relation to latest news and updates that we think will be of interest to you. We will not disclose your information to any third party and you can unsubscribe from our database at any time.

      Please fill out the form below, your download will automatically start. Your download will also be available via email in case it doesn't automatically start.