Warm Floor Store
FREE UK Delivery On orders over £250net*
Need some help? Call us on 0330 320 9900
Finance Available On orders over £250*

Warmup Ultralight 6mm Underfloor Heating Board 800mm x 1200mm (Single Board)


Heat Spreading


Sound Reducing

Unique 4-in-1 Design

Noise Reduction

Thickness: 6mm

Board Size: 800(W) x 1200mm (L)

Option Product Code Price Quantity
Single Board 800mm x 1200mm WCI-170

£17.40 INC VAT

£14.50 EX VAT


Ultralight is the next generation of insulation by Warmup, developed for faster heat-up times and to offer an easier, more flexible installation. Insulation dramatically improves the energy efficiency of underfloor heating as it assists in preventing the heat produced by the system from escaping into the subfloor below – thereby keeping the radiant warmth within the room whilst reducing energy costs.

Ultralight has been engineered with a multi-layer construction method for maximal insulation properties and heat conductivity. Its energy-saving insulation layer is enveloped between a top layer of synthetic fabric, onto which a heating system can be directly installed, an aluminium core which assists in an even and efficient distribution of heat, and a base layer of decoupling fleece.

The decoupling fleece base layer offers an ideal surface to adhere to the subfloor whilst also providing increased protection for tiled floor finishes due to any potential damage caused by lateral subfloor movement.

Ultralight also features soundproofing qualities; its acoustic performance is comparable to dedicated acoustic products such as those manufactured from reground rubber, cork and soft foams. It does this without compromising on its insulating, heat-spreading or decoupling performance. Ultralight has been tested and rated for its acoustic performance by Intertek Building & Construction.

The innovative aluminium layer within the Ultralight board is proven to help spread an underfloor heating system’s warmth faster and more evenly to the floor finish above – creating a more comfortable environment to enjoy. With Ultralight, you can expect rapid heat-up times of as little as 27 minutes to bring a room to your optimal temperature.

Using a Warmup Smart Thermostat alongside your new UFH system and Ultralight will enhance the energy performance of your home. The 6iE Smart WiFi Thermostat can help you save 25% on your energy bills and offers automatic heat functionality so your home is always at the right temperature, at the right time, for you.

Ultralight’s larger design compared to traditional insulation boards covers 28% more of the floor area and its lightweight but durable construction means it is less than half the weight of other boards – meaning you can cover a 15/m² room with Ultralight in one trip, rather than three trips with standard boards.

With no cement coating, Ultralight is also more flexible than other insulation boards and can be easily cut to requirements with no risk of dust. It can be used with almost all floor finishes and features a 10-year limited warranty for your peace of mind.


Thickness: 6mm ±0.2mm.
Dimensions: 800mm (W) x 1200mm (L) ±6mm.
Area: 0.96m².
Weight of Board: 1.1kg.
Thermal Resistance EN 12667: 0.111 m²K/W.
Thermal Conductivity EN 12667: 0.054 W/mK.
Reaction to Fire, EN 13501-1 EN ISO 11952-2: Euroclass E.
Release of Dangerous Substances, REACH: SVHC ≤ 0.1% w/w.
Robinsons test, 100 - 199 mm tiles, ASTM C627: Domestic.
Robinsons test, 200 - 599 mm tiles, ASTM C627: Light Commercial.
Robinsons test, ≥ 600mm tiles, ASTM C627: Heavy Commercial.
7-Day Shear Strength, ANSI A118.12: 113 psi (780 kPa).
Crack Resistance (Anti-Fracture / Decoupling), ANSI A118.12: ≥ 1/8" => High Performance.
Long-Term Water Absorption, EN 12087: 0.052% w/w.
Water Vapour Permeability, EN 12086: 9.12 mg/m²h.
Mould Growth, ANSI A118.12: Does not support mould growth.