RTTBB-10-2400-900 ThermaSheet Insulated Building Board - 2400mm x 900mm x 10mm (Box of 6)

RRP $700 ($636.36 ex. GST)

FOR CONSTRUCTION PROJECTS

The specially manufactured cement-polymer–coated surface of ThermaSheet provides an ideal substrate for direct tiling. Its high-performance composite structure—featuring a rigid waterproof core, fibreglass reinforcement, and a polymerised cementitious facing—ensures exceptional stability and long-term durability.

ThermaSheet is particularly recommended in wet areas such as bathrooms, kitchens, wetrooms, and utility spaces where walls and floors are exposed to frequent or prolonged moisture. Lightweight and easy to handle; once installed, ThermaSheet provides a perfectly smooth, stable, and moisture-resistant base suitable for a wide range of decorative finishes, including tiles, synthetic renders, decorative plaster, and more.

FOR UNDER FLOOR HEATING INSULATION

Installing ThermaSheet beneath an underfloor heating system dramatically reduces both heat loss and the cost of running domestic heating systems. Offering excellent thermal properties, using ThermaSheet in conjunction with underfloor heating improves the efficiency of the heating system.

INSTALLATION

When installing Thermasheet in wet areas, including applications prior to the installation of underfloor heating systems, mechanical fixings are not required. The boards must be fully bonded to the substrate using a cement-based tile adhesive or an appropriate Sika® adhesive. Solvent-based or ready-mixed adhesives must not be used. All board joints are required to be sealed with compatible waterproof membrane tape to ensure a continuous, watertight barrier.

For wall installations or other vertical or non-load-bearing applications, Thermasheet must be mechanically fixed to the substrate using the specified screws and washers, which are sold separately.

NB. Due to the size of this product, additional freight charges will apply. Please contact our office for a shipping quote.

Flat Tile Backer Board
Width: 900mm
Height: 2400mm
Depth: 10mm
Warranty: 10 years
Fixings NOT Included
Warranty: 10 years

Thermasheet Installation Instructions

Thermasheet Technical Specifications

Thermasheet Warranty

AS 1530.3 Flammability Test

Thermasheet Flyer

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where to buy

As Radiant are a wholesaler we are not able to sell directly to the public. However, we have a network of thousands of retailers nationally that will be happy to help you.