U Value Calculator
Colour Picker
Find an Installer
Contact Us

Cavity Rail Render Carrier Board Systems

Our Render Carrier Boards are primarily designed for application in timber frame and steel frame structures, offering versatility in installation. They are typically affixed directly to either timber battens or Wetherby cavity rails.

There are two A1 (non-combustible) options, in accordance with BS EN 13501-1, when
incorporating clay brick slips. Steel frame systems offer an A1 rating from substrate to
exterior brick finish, while timber frame systems offer an A1 rating from the fire-proof render
carrier board to the brick slip finish.

These systems are designed to provide architects and end clients with maximum adaptability, our render carrier board accommodates a wide array of Wetherby finishes, including our thin coat finishes, clay brick slips and acrylic brick slips, ensuring exceptional flexibility in design options.

Watch the Cavity Rail Render Carrier Board System in action…

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

Render Carrier Board Finish Options

The first finish option available for the RCB system is our popular Brick Slip, a real clay durable finish with heightened fire resistance when incorporated into the system. In addition, we have Acrylic Brick Slips which present a lightweight façade option that combines aesthetic appeal with easy installation, while our Silicone Render systems offer a flexible, anti-crack formulation.

Brick Slip Options

We offer a wide range of brick slips, available in an array of thicknesses, colours and textures

Unlike other brick slip systems currently available, which often comprise of an acrylic brick finish, Wetherby brick slips are manufactured and fired in exactly the same way as traditional clay bricks.

Acrylic Brick Slip Options

The Wetherby Acrylic Brick Slips are crafted from superior quartz sand blended with acrylic resin, offering remarkable flexibility.

These slips are designed for quick installation, saving you time and money. With a thickness of just 4mm and a lightweight composition weighing only 4kg/m2, they present an appealing alternative to traditional clay brick slips or real brick.

Modular Render

Thin Coat Render Options

The Wetherby silicone and acrylic render systems provide superb quality, ease of application and a superior colour range.

The flexible anti-crack formulation and ultra-violet resistant pigments of a silicone or acrylic render allow for large areas to be seamlessly rendered with perfect colour consistency.

Find your thin coat render colour on our colour carousel…

Over 400 NCS colours to choose from

Find your colour!

Benefits of our Cavity Rail Carrier Board System

The Cavity Rail Carrier Board 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
Space Saving
Easy To Install
Fire Resistant

Explore Wetherby Building System’s unmatched excellence, backed by a wide range of certifications, affirming our commitment to quality.

Steel Frame

KIWA BDA Agrément BAW-23-280-S-A-UK

Timber Frame (Cavity)

KIWA BDA Agrément BAW-23-278-S-A-UK

Case Studies

Discover real-world examples where challenges were met with innovative solutions, and obstacles transformed into opportunities.

wetherby modular facade

Carrickfergus, Belfast

Read More
modular brick slip

Richmond School

Read More
epsitec rail

Coates House, Bristol

Read More
epic building

Epic Building, Paignton

Read More
aberystwyth fc

Aberystwyth Football Club

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.


    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.