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A man in a red sweater and jeans installs foil insulation behind a radiator using tesa tape. A snowy scene is visible outside the window, and the room has blue walls with white curtains. (This text has been generated by AI)

Radiator Insulation

In any house, there are many areas that can lead to energy loss and thus to accordingly high heating costs. Asides from the roof, doors, and windows, the wall behind a radiator is one such area. In order to prevent unnecessary costs, it’s advisable to install radiator insulation. Then the warmth will stay where it should be, thus making your living space comfortably warm. It takes just a few steps to put up radiator foil.

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tesamoll® Heat reflector foil

tesamoll® Heat reflector foil is an energy saving foil that reduces the loss of energy through the walls by reflecting the heat generated by radiators.

  • Aluminium-coated foam material
  • Suitable for mounting behind heating radiators
  • Fixing materials not included
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Save energy and reduce costs with a radiator reflector foil

t may be that some rooms do not really get warm despite the heating being turned up. With high energy prices, this situation is particularly annoying. Often, a large part of the heat escapes directly through the wall behind the radiator. This can be due to poor or old insulation of the wall. There is a practical and effective alternative to an elaborate and costly renovation: our tesamoll® reflector foil for radiators.

Thanks to the high-quality aluminum coating, the heat from the radiator is reflected into the room. The coated side faces the radiator. The reflective wallpaper is made of polyethylene foam and effectively ensures a warm room. This keeps the heat inside the apartment and the cold air outside. The reflective panel acts as both an insulator and a barrier. At the same time, you reduce your heating costs.

There are no empirical studies on the savings potential of reflector foils. However, users report that about 1-2 degrees can be saved with a reflector foil. This corresponds to about 6-12% of heating costs. The worse the wall is insulated, the greater these savings. However, even the smallest savings are worthwhile with high energy costs.

Applying Radiator Reflector Foil: Step-by-Step Guide

01Measure Radiator and Brackets

Note the total width of the radiator and the position of the brackets. Often, you can simply measure the width of the bracket. Then, you only need to mark the distance from the top of the radiator to the bracket.

02Cut Reflector Foil

You can easily cut the reflector foil. This allows you to customize the insulation to your radiators so that nothing protrudes behind the radiator.

03Apply Reflector Foil

Now you can slide the reflector foil behind your radiator. This quickly reduces heating costs and leaves more time to enjoy the pleasantly warm apartment. To avoid mold, the reflector foil should not lie directly against the wall.

Advantages of Our Radiator Reflector Foil:

  1. High-quality and effective materials ensure significant savings
  2. Customizable
  3. Easy installation (no fasteners required)
  4. Safe (suitable for temperatures up to 70 ºC)
  5. Unobtrusive (only 3 mm thick)

An effective alternative to expensive wall renovation

A radiator reflector foil is the practical, cheaper, and equally effective alternative to expensive renovation. You can simply cut the reflector foil and slide it behind the radiator. In just two steps, you can already prevent the greatest heat loss directly at the radiator.

The reason for its effectiveness is the high-quality materials. These act both as insulation and as a barrier. This keeps the warm air inside and the cold air outside. The room becomes and stays warm, and heating costs are reduced.

The only danger with reflector foils is mold formation. However, you don't need to worry about this with our tesamoll® radiator reflector foil. We have deliberately avoided any fasteners, such as glue. This ensures that the reflector foil does not lie directly against the wall. This allows for important air circulation and prevents mold.

Avoiding Mold with a Radiator Reflector Foil


The only disadvantage and danger with reflector foils is mold formation. If the reflector foil is attached directly to the wall behind the radiator, mold can form. This only happens if the radiator reflector foil is glued to the wall with gaps. This is not the case with our tesamoll® reflector foil. So you don't need to worry about mold with the reflector foil. We have deliberately avoided any fasteners, such as glue. This ensures that the reflector foil does not lie directly against the wall. This allows for important air circulation and prevents mold.

Frequently Asked Questions and Answers about Radiator Reflector Foil

Do you want to save even more energy? We can help you with that!