Wallrock Thermal Liner is the most popular member of the Wallrock Thermally Efficient Wallpaper range. Being 450gsm (2-3mm in thickness) it offers worthwhile energy savings, for example 15% on typical solid brick external walls (as tested by the BBA). All Wallrock Thermally Efficient Wallpapers work to save energy from the moment the heating is turned on, by slowing down the rate at which cold walls soak up heat energy - and allowing the room to warm up considerably faster, in some cases more than halving warm up times, creating a comfortable room environment with less energy. This effect is valuable in any home with solid walls and even those with external or cavity insulation - especially where the heating is regularly turned on and off. Once the room is warmed up and comfortable, Wallrock Thermal Liner goes on working, producing steady energy savings. Furthermore, Wallrock Thermal Liner has excellent capability to cover and reinforce poor plaster and other surfaces such as plasterboard, blockwork and wood panelling. Wallrock Thermal Liner also helps reduce condensation problems, in many cases eliminating them - as more room warmth is retained at the wall surface at an earlier stage in the warm up phase there is far less opportunity for condensation to form on a cold wall and consequently a reduced risk of unhealthy mould growth. The surface of Wallrock Thermal Liner is longlasting, durable and suitable for painting directly, although for a perfect finish we recommend cross lining with Wallrock FibreLiner Original or Wallrock Fibreliner Smooth (avoid the use of standard linings), which allows not only painting but also the application of decorative wallpaper. Use Wallrock Thermal Liner adhesive to apply.