Does thermal liner really work?

by Ellen Evans

Does thermal liner really work?

With energy bills always on the rise, most of us would like to make our homes as efficient as possible. Unfortunately, some measures can be pretty expensive, but thermal liner is an easy, cheap and effective way to reduce the amount of money spent on heating, and to make your home feel warmer. Wallrock KV600 is a trusted thermal lining product with proven performance.

How does thermal liner work?

Put very simply, thermal liner is wallpaper that saves you money! Wallrock KV600 is 4mm thick, made from a layer of insulating material, bonded to a heavy-duty reinforced liner. This works by creating a thermal barrier on the wall’s surface. This means more heat stays in the room, so it warms up more quickly and helps prevent heating being wasted.

It also combats the formation of damp and mould, whilst still allowing walls to breathe. Condensation can occur on walls when the temperature of the air around them is significantly different. By raising the temperature of your walls, Wallrock means that water vapour created by everyday activities in your home such as showering and cooking won’t settle as condensation  – preventing future problems. As well as potentially causing structural issues in your home, damp also encourages the growth of mould spores, which (as well as looking horrible) can have direct impacts on the health of you and your family.

As well as helping to prevent heat loss and combating damp, KV600 thermal liner also smooths out imperfections in walls, providing a better surface for painting or wallpapering.

How is thermal liner applied?

It’s easy to apply KV600 to walls yourself. It comes with detailed instructions, but all it really takes is a layer of special adhesive on the wall and then ensuring you have hung the liner flat against the wall. Once it has dried, seams can be filled with flexible filler and then you can paint or wallpaper directly onto the surface.

How is the effectiveness of thermal liner measured?

The performance of any insulation product is determined in 3 ways:

  • First up is its thermal conductivity. Thermal conductivity is how much the material improves the energy efficiency and thermal comfort of the material. The more efficient the material, the less heating will be required (and less money spent) on heating bills.
  • Another measurement is the thermal resistance (R-value). This measures how well the material resists heat transfer (i.e. retains heat, rather than letting it pass through), taking into account the thickness and ingredients of the material.
  • The other measurement is the thermal transmittance (U-value). This is the opposite of the R-value. This measures how easily a material conducts heat; the lower the number the smaller of amount of energy or heat will be lost.

Energy savings from Wallrock KV600

Taking into account the above, Wallrock gives the following worked example of the increased efficiency resulting from installing Wallrock thermal liner:

‘A typical U value of a plastered solid brick wall is 2.1 Watts/mtr2 K
Therefore the R value is 1/2.1 = 0.476m2 K/W
The BBA certificate for Thermal liner states an R value of 0.0821 mtr2 K/W
The total R value for the wall with thermal liner is 0.476 + 0.0821 = 0.5581mtr2 K/W
This can be converted back to a U value; 1/ 0.5581 = l.79 W/mtr2K
As a result by applying Wallrock Thermal Liner to solid walls the U value is reduced from 2.1 to 1.79 W/mtr2 K
In conclusion, by applying Wallrock Thermal Liner to a solid wall the standing heat loss can be reduced by 15%.’

The exact performance of Wallrock will vary, as it depends on the outside temperature and the wall thickness and construction of the walls.

Should I try thermal liner?

Thermal liner is definitely a good starting point if you’re thinking about making energy efficiency improvements in your home – and we think KV600 is the best product of its type. Most people who install it see an increase in efficiency and also in the warmth of their homes. It’s an Energy Saving Trust-approved product. It’s also an environmentally friendly option, as it contains no PVC and is made with paper from managed sources. You should definitely consider it as a great cost-effective alternative to more expensive energy saving measures.

See the product page for further technical information.

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