Window Replacement or Window Film? That is the question.

an old window with bad window insulation

Poorly insulated windows can cause major problems, the main being losing heat (and therefore money) during the colder months. As you can imagine, this drastically reduces the energy efficiency of homes and commercial spaces which results in many home and business owners looking for solutions. Window replacement is often the first port of call – but is this really the best? Here we look at the top two window insulation options.

Window replacement: it’s expensive and not always an option

If you have poor window insulation, replacing them can be expensive! The average price for new windows can be anything between £500 to £3,200 per window depending on the glass and frame type, window accessibility, size, and labour costs.

Not only that, but window replacement causes major disruption too. For commercial spaces, this can negatively impact operations resulting in reduced employee activity and loss of revenue.

While replacing a single pane of glass with a double-pane does lead to energy savings of up to 15%, not everyone can afford to replace their windows. For others, window replacement isn’t even an option at all! For example, in historically registered or listed properties (like manor houses), you are not allowed to replace the windows. Even if you own it privately!

a manor house with lots of old windows with bad window insulation
A single pane window loses 20x as much heat as the same area in an adjacent well-insulated wall.
Nearly 40% of heating loss in commercial buildings is due to windows.

Window Film: an alternative to reglazing

While window film is not a cheap solution (it’s a premium product, after all), it’s still a more convenient and cost-effective alternative to replacing windows.

How? Because it can be applied to your existing glazing with minimal disruption and it improves heat retention by up to 40%. That’s lower installation costs and energy savings from the get-go, not to mention that businesses are able to continue operations without disruption.

For historically registered or listed buildings, 3M Thinsulate Climate Control Window Film is a high-end solution to double glazing. It doesn’t change the look of the windows at all but it makes a massive difference to their insulation value! One application can make single-pane windows into double-pane or double-pane windows into triple-pane.

Upgrade your window insulation

Both window replacement and window film will improve your window insulation, but your decision will come down to budget, ROI, effectiveness, and convenience. It may also come down to the fact that you can’t replace your windows, so window film is your only option.

If you do have a historically registered or listed property (whether private or commercial), don’t hesitate to contact us about your windows. Old windows aren’t energy efficient and we have the best solution to improve your glazing and comfort.



If you need any help or advice on what types of window films are best for your house, company or office, don’t hesitate to get in touch; we’d love to help! Applied Products has a large range of specialist films and as partners with The 3M Company, we can help you transform your room into a comfortable and productive space whilst also making it much more energy-efficient.

Applied Products – [email protected] / 01792 895730


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