Many people today face exactly this dilemma: On the one hand, energy prices continue to rise — on the other hand, comprehensive modernizations like a complete window replacement are expensive, complex, and often not even feasible. The good news: There is an effective and affordable alternative — highly transparent thermal insulation film.
Your heating costs are skyrocketing — but new windows would break your budget? You live in an old building or a rental apartment and wonder if a window renovation is worth it?
Or do you simply want to prevent heat from entering in the summer and cold from seeping in during the winter? Especially in rental apartments or listed buildings, the options are limited.
In a case study conducted by 3M on solar and thermal insulation film, the Markthal in Rotterdam was fitted with 1,200 m² of the 3M™ Prestige Series. The result: Despite the large glass surfaces, the hall remains flooded with natural light while effectively blocking heat. Thanks to this measure, visitors and vendors now enjoy a pleasant and stable indoor climate all year round.
In this article, you will learn how to retrofit your windows with minimal effort and a small budget, save energy, and improve your indoor climate — without compromising on light transmission or appearance.
Why thermal insulation is so important
Windows are among the biggest energy weak points in buildings. Especially in old buildings or with older glazing, a significant portion of heating or cooling energy is lost through the glass surfaces.
Thermal insulation on windows offers several advantages at once:
Reduced heating and cooling costs: Less energy loss means lower consumption — and thus a direct relief for your wallet.
More sustainability: Using less heating or cooling not only saves money but also reduces CO₂ emissions.
Better indoor climate: Thermal insulation film ensures that rooms cool down less in winter and do not overheat in summer — without drafts or heat buildup.
The smart solution: thermal insulation film for windows
Thermal insulation films are special high-tech films that are applied directly to the glass surface. These building protection films improve the energy performance of the glazing — without changing the window itself.
There are different types of films:
Reflective films: They reflect part of the solar radiation and thus protect against overheating.
Highly transparent films: Almost invisible yet effective — ideal for listed buildings or rental apartments.
Tinted films: These additionally reduce glare and provide a slight privacy effect.
The big advantage: Installation is done without any structural changes. This means no noise, no dirt, no building permit — and all at a fraction of the cost of a complete window renovation.
Thermal insulation film vs. window replacement — A clear cost comparison
A complete window replacement is complex and expensive. Depending on the size and number of windows, costs can quickly add up to several thousand euros — especially with special glazing or large window fronts.
In contrast, thermal insulation films, including professional installation, often cost only a fraction. This investment can pay off after just a few years — thanks to saved heating costs and extended window lifespan.
Versatile applications for thermal insulation films
Thanks to their flexibility and efficiency, thermal insulation films are used in a wide variety of settings:
Office buildings with glass facades: Reduced air conditioning costs and a more balanced indoor climate.
Private homes and old buildings: Ideal for owners or tenants who want to upgrade their windows’ energy efficiency.
Shop windows and retail stores: Protection against overheating without loss of light — especially important for displays.
Our service at Fotoreklame — Everything from a single source
As an experienced specialist company, we offer you not only the right thermal insulation film but also comprehensive service:
Individual consultation: We help you find the right film for your specific needs.
Professional installation: Bubble-free, clean, and permanently durable — thanks to expert application.
Removal of old films and lettering: We take care of existing films so that the result is perfect.
Maintenance & care: On request, we also offer long-term support and cleaning.
Frequently asked questions about thermal insulation film (FAQ)
How long do thermal insulation films last?
Depending on quality, location, external influences, and usage requirements, they can remain effective for a long period.
Do you lose light because of the film?
Hardly, since highly transparent films allow up to 90% of daylight to pass through.
Can the films be removed again?
Yes, thermal insulation films can also be removed.
Are thermal insulation films subject to approval?
In some cases, they are not; however, for listed buildings, such as in the museum sector, permits must be obtained from the relevant authorities. Even with regular commercial properties, you should check whether approval is required. Fotoreklame will gladly support you with this.
How does thermal insulation film work?
The film creates an additional insulating layer on the glass pane.
When do the costs pay off?
Often after just 2–4 heating seasons, depending on the building and energy consumption.
Conclusion: Thermal insulation film — Small investment, big impact
Thermal insulation films are the perfect solution for anyone who wants to reduce their energy costs while increasing comfort in their rooms — without replacing the windows. Whether for private, commercial, or rental use: the advantages are compelling.
👉 Get a consultation now and learn more
