Foil Behind the Radiator: A Simple Way to Increase Heat in the Home by 20%.

Using Foil-Coated Expanded Polyethylene

According to ТСН: The best material for insulating radiators is expanded polyethylene with a foil coating. The shiny layer effectively reflects heat going from the radiator to the wall and returns it back into the room, making the air much warmer.

Attaching the Foil

You need to secure the foil to the wall behind the radiator so that it acts as a reflective screen. It is important that the shiny side faces the room. Be sure to leave a gap of 2-3 cm between the radiator and the insulation, as expecting desired heat is unrealistic if the insulation tightly adheres to the radiator.

Quality of the Insulation

Foil insulation can be purchased at any construction store. To check its quality, perform a simple test: burn a piece. If it burns, the foil is of poor quality; if it melts, the material is safe and suitable for use.

Installing Foil Insulation

Cut a rectangle that slightly exceeds the size of your radiator and secure it to the wall behind the radiator. You can use double-sided tape or liquid nails for fastening.

Effectiveness of Use

This method is especially effective in old houses with poorly insulated exterior walls or if the radiator is located near a cold wall. Even very hot radiators will benefit from the foil screen.

However, if the walls are thick and well insulated, the difference in insulation may be minimal. It is also not recommended to use foil for radiators in narrow niches where the wall is thin — this may lead to freezing and destruction of the partition.

In general, using expanded polyethylene with a foil coating can significantly increase comfort in indoor spaces, especially in cold weather. Simple installation and availability of materials make it an attractive option for those looking to save on heating and ensure warm living conditions. Don't forget to check the quality of the insulation before purchasing to ensure your investment is profitable and safe.