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Heat Insulation Film

Insulation & Heat-Reflective Window Film


Window solar film (or “heat-reflective film”) reduces exposure to unhealthy UV rays of the sun from entering your room and creates an environment that is healthier, safer and protects your valuable furniture and fabrics, including conservatories.


  • Is your house or conservatory under constant excessive heat?
  • Are you frustrated that you cannot use the sunniest room in your home in the summer?
  • Do you often have complaints of fading of the fabrics and the furnishings?
  • Have you realised that your blinds absorb the heat, thus adding to the problem?
  • Do you wear sunglasses inside to fight the sun’s glare?


Prism can install an insulation film that keeps the heat inside during winter. We can also install an all-season window film that keeps heat inside during winter and heat out during summer, of course available in various tints, shades, patterns and colours.

Application of Solar film reduces unwanted heat and glare by 80%, without causing a major change in the intensity of the visible light. Prism window film is designed in such a way that heat build-up is reduced during the hotter days, while increasing retained heat.

Available in different shades, mirror finishes and colours, Prism window film gives a completely stylish and a glamorous look to your home. Choose from:

  • Frosted film
  • Stained glass film
  • Decorative film
  • Bathroom-only film
  • Obscure window and glass film
  • Patterned and printed film
  • Vinyl film
  • Clear and transparent film
  • Etched glass film
  • Glazed film


Although window blinds have been known to reduce sun glare, they do not eliminate heat build up inside rooms. In addition to cutting out light, they are also difficult to maintain, as they attract dust and insects and are inexpensive when compared to blinds.

Once installed, not only are there no further maintenance costs, insulated window film is easy to clean. Your home will also benefit from an added layer of privacy, due to the film’s one-way-mirror effect.

Prism will guide you towards choosing the right kind of film for your windows, as well as considering the environment.

Reduce unwanted glare by 80% in your sunniest rooms


As heat control window film lessens glare and unwanted heat by up to 80%, you may wish to consider having the Prism solar control film applied to your roof glazing. While attractive, its capabilities to restrict unwanted rays of sun are remarkable.

How much solar heat, glare and UV can window insulation film reduce?


With Prism Window Film

¼” Single


¼” Single


Double Pane


Double Pane


Solar Heat Reduction 72% 57% 58% 49%
Heat Loss Reduction 10% 10% 6% 6%
Glare Reduction 83% 83% 83% 83%
UV Blocked 99% 99% 99% 99%
Total Solar Energy Rejected 79% 79% 79% 79%

As temperatures across the UK increase and record predictions are broken every year, investing in a window film solution and a system that is proven and convenient to use, makes perfect sense.

At the same time, why not also reduce the risk of burglars breaking a window and gaining entry into your home? Security window film is created by layers of polyester film bonded by special adhesives. These create an almost invisible safety field around the glass, preventing it from shattering.

Our team of professional experts will guide you correctly in choosing the right window film for any type of window in your home.

Your #1 choice for window film supply & fitting


All of our window films can be installed by home owners or fitted by a qualified Prism installer.  

We’re committed to becoming the first-choice supplier of window films for homes locally in Hitchin, Hertfordshire and home counties as well as across the UK.

With a dedication to delivering the best service, we combine professionalism with top quality advice and experience spanning 22 years.

Why choose us?

  • A fully qualified professional to install
  • Complete manufacturer’s warranty
  • Extensive range of window film tints
  • Not restricted to 1 manufacturer
  • Maintenance free and easy cleaning – just wipe with a moist sponge or cloth
  • Long life (up to 20 years)
  • Usually installed once only
  • “No disruption” installation
  • Typically installed within 1 day
  • Applied to existing glass


Find out more about how we work, read our customer testimonials and case studies or get to know more about us. Alternatively, catch up on our latest news, see examples of what we do in our gallery or dive into our FAQ’s and resources sections.

We can also help building contractors, architects and specifiers on new builds, renovations and refurbishment projects.