Determine energy saving potential with insulation films
Use our calculator to estimate your annual savings when using a cold-protection film.
Please note that the results are only an estimate and may differ from your actual savings. Wall insulation, for example, is not taken into account.
This low-E window film minimises heat loss from windows in winter by up to 35 %. In summer, the slightly grey tinted film noticeably reduces the heating of rooms with 58 % energy rejection. It is perfect for living spaces where plenty of light should continue to shine in.
This energy-saving and cold protection film can reduce heat loss by up to 33 %. It also offers 78 % energy rejection very high thermal insulation in summer.
This anti-fog film for mirrors prevents glass panes and mirrors from misting up, for example in the bathroom after showering. The panes do not mist up and remain clear and transparent.
Three Reasons to Retrofit with Thermal Insulation Film
1. Insulating film noticeably reduces heating costs
Energy-saving films, also known as Low-E films, are designed to reduce heat loss at the window. Thermal insulation film improves window insulation by reflecting heat (IR radiation) back into the room, thereby providing effective protection against the cold. The air inside the room is prevented from cooling down against the cold outer window. This helps save heating costs in winter and improves the thermal insulation of the window.
Unlike other energy-efficiency upgrades, such as retroactively insulating the roof or walls, a cold protection film for windows requires no major structural changes. Compared to buying and installing new windows, it is a more cost-effective retrofit solution that anyone can apply. Thanks to our cutting service, the insulating film is delivered in an exact fit and only needs to be applied to the inside of the window to be insulated.
These are the windows where using insulating film is worthwhile
As a general rule, the older the windows, the greater the savings potential.
- For single-pane glazing, such as large shop windows that naturally lose a lot of heat, insulating films achieve the most noticeable effect.
- Retrofitting is also worthwhile for double glazing with a high Ug value.
- Modern triple glazing benefits to a lesser extent. Here, it depends on the individual case whether the retrofit will pay off quickly — we will be happy to advise you!
2. Cold protection film increases comfort near windows
In the past, radiators were often positioned directly in front of windows to counteract the cold radiating from them. In this case, retrofitting with insulating film is especially recommended because it reflects the relatively high radiant heat back toward the interior like a shield, especially in the immediate vicinity of the heating source. Without Low-E film, heat loss through the affected window would otherwise be many times higher. The heat just produced by the radiator escapes unhindered through the pane.
Another positive effect is that the cold we feel near windows is noticeably reduced with cold protection film installed. You can easily notice the difference by comparing a retrofitted window with one that has no film using your own hand. The warmer air near the window is immediately noticeable – try it yourself!
3. Reduce the warming of rooms in summer with insulating film
All insulating films have a sun protection function of varying strength depending on the film type, which reduces the heating of rooms in summer. They therefore also serve as sun protection films. Total energy rejection ranges from 52% for a lightly tinted insulation film up to 78% for a dark silver mirrored thermal insulation film. As a result, air conditioning systems are relieved in summer, and energy costs are reduced once again. Comfort increases significantly in the now cooler rooms.
Insulating films for windows offer several advantages over other methods of improving the energy efficiency of buildings
Easy application: Insulating films are easy to apply and can be installed by anyone without special skills or tools.
Cost efficiency: Compared to other methods of energy-efficient renovation, such as replacing windows, insulating films are very cost-effective.
Time savings: Installing insulating films usually takes only a few minutes, making it faster than other renovation methods.
No impact on appearance: Lightly tinted insulating films generally do not affect the appearance of the building, as they are barely visible.
Effective thermal insulation: Insulating films can provide effective thermal insulation and help reduce energy consumption in winter, thereby saving costs.
FAQs about Insulating Films / Cold Protection Films
The amount of potential savings depends on factors such as energy prices, the quality of the installed windows, and the insulating film used. With the help of our energy savings calculator, you can estimate your possible savings. On average, the investment pays for itself in just 2–3 years.
Insulating films have a noticeable effect, especially on older panes. A special coating on the film effectively prevents infrared radiation (room heat) from cooling down against the cold exterior glazing. The feeling of cold near windows disappears.
Insulating films are also called cold protection films or cold films, thermal films for windows, energy-saving films, all-season films, thermal insulation films or insulation films for windows, or Low-E window films. All of these terms describe window films that reduce heat transfer through window glass, depending on the temperature difference between the warm and cold sides, and therefore lower energy costs.
Like a sticker, insulating films have a transparent adhesive applied to the back. This is covered by a protective liner that must first be removed. Then the adhesive side and the pane are sprayed with water. After that, the film is placed onto the glass and the water underneath the film is squeegeed out.
To remove insulating film, grip it at one corner and then slowly peel it off at a shallow angle. For adhesive films, the film can first be gently warmed with a hairdryer to loosen the adhesive.