Low-emissivity — "low-e" — window film is designed to work at both ends of the year: it reflects a portion of your indoor heat back into the room in winter, while still cutting solar heat gain in summer. It's the closest film gets to an all-season upgrade.
What 'low-e' means
Emissivity is how readily a surface radiates heat. A low-e coating radiates less, so instead of your indoor warmth escaping through the glass, more of it is reflected back inside — reducing heat loss through the windows in cold weather.
Summer and winter benefit
In summer, low-e solar films reject solar heat like any solar film. In winter, the low-e property trims heat loss through large or older windows. It won't match good triple glazing, but on single-glazed or big-glazed rooms it takes the edge off both extremes.
Who it suits
Low-e film is worth considering for period homes with single glazing, rooms with a lot of glass that feel cold in winter and hot in summer, and anyone wanting a year-round rather than summer-only benefit.
The bottom line
Low-e window film reflects indoor heat back in winter and rejects solar heat in summer — a genuinely year-round option. Book a survey and we'll advise whether low-e is right for your glazing.
Thinking about window film? We offer a site survey anywhere in Scotland, with most quotes returned within 24 hours.