Wallrock Thermal liner KV600 is the most effective member of the Wallrock Thermally Efficient Wallpaper range. Being 600gsm (3-4mm in thickness) and offered in a roll of 15m², twice the coverage of standard Wallrock Thermal Liner; Wallrock Thermal Liner KV600 offers very worthwhile energy savings, well in excess of the 15% standard Wallrock Thermal Liner provides on typical solid brick external walls. Wallrock Thermal Liner KV600 works to save energy from the moment heating is turned on by slowing down the rate at which a cold wall soaks up heat energy - and allowing the room to warm up considerably faster, in many 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 KV600 goes on working producing steady energy savings. Furthermore, Wallrock Thermal Liner KV600 has excellent capacity to cover and reinforce poor plaster and other surfaces such as plasterboard, blockwork and wood panelling. Wallrock Thermal Liner KV600 also helps reduce condensation problems and in many cases eliminates them - as much 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 KV600 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 the application of decorative wallpaper.