Stop rooms overheating in summer.
Heat reduction window film for Scottish homes and businesses — reject up to 79% of solar heat from conservatories, extensions and south-facing rooms without blinds or air-conditioning.
Why heat reduction film beats blinds.
If a room becomes unusable on a sunny day, heat reduction film solves it. It's the same technology as solar control film, focused on the outcome most people care about: a cooler, more comfortable room. We treat conservatories, glass extensions, loft rooms and south-facing living rooms across Scotland, usually in a single-day install.
Get my film quoteWhat this film does.
Reject up to 79% of solar heat
The film stops heat at the glass — far more effective than blinds, which absorb heat inside the room and radiate it back.
Keep the daylight
You lose the heat, not the light — the room stays bright and welcoming.
No aircon needed
Often removes the need for a portable air-conditioner entirely, saving running costs and clutter.
Single-day, no mess
Applied to the inside of the existing glass — no structural work, no glass replacement.
Why glazed rooms overheat
Sunlight passes through glass and is absorbed by floors, furniture and walls. They warm up and release that energy as heat, which does not pass back out through the glass as easily as the sunlight came in. On a clear day the room keeps gaining heat faster than it can lose it.
Blinds and curtains help with brightness, but by the time sunlight reaches them it is already inside. Much of the heat they absorb stays in the room. Heat reduction film works at the glass itself, rejecting a large share of the solar energy before it gets in.
How heat reduction film works
The film reflects and absorbs part of the sun's energy at the window. Two figures matter when choosing one. Total solar energy rejected (TSER) is the share of heat the film stops; our best films reject up to 79%. Visible light transmission (VLT) is how much daylight still comes through.
Near-clear spectrally-selective films keep most of the daylight while still cutting heat. More reflective films reject more heat and glare, with a more noticeable mirrored look from outside. The right choice is a balance for each window, not simply the darkest film available.
Choosing the right film
Near-clear films
For rooms where appearance and daylight come first, such as living rooms, period homes and show-piece glazing. A smaller change in look, with useful heat and UV control.
Reflective films
For the hottest glass, such as south and west-facing conservatory roofs and large commercial elevations. Stronger heat and glare rejection, plus daytime privacy.
External films
Used where internal fitting is not suitable for the glass. External films carry shorter manufacturer warranties, typically up to 3 years, compared with up to 10 years for selected internal films.
Checking the glass first
Film that absorbs heat warms the glass it is fitted to. On most glazing this is not a problem, but some combinations of glass type, size, coatings and partial shading need care. On the survey we check what the glass is, how much sun it takes and whether it is double glazed, then recommend a film that is compatible with it. This is why we specify each window rather than fitting one product everywhere.
Film reduces solar heat coming through the glass. It will not cool hot outside air coming in through open doors, or heat from cooking and appliances, so it works best alongside sensible ventilation.
Where it makes the biggest difference
- Conservatory and orangery roofs, which take direct overhead sun
- Roof lanterns, skylights and Velux windows in kitchens and loft rooms
- South and west-facing bi-folds, patio doors and glass extensions
- Home offices that become too warm by mid-afternoon
- Commercial rooms and desks close to large areas of glazing
Where we install it.
Questions about
heat work.
How much cooler will the room feel?
Most customers report a south-facing conservatory going from unusable on a sunny day to comfortable. The exact drop depends on the glazing and film grade, which we match on the survey.
Is it the same as solar control film?
Yes — heat reduction is the main job of solar control film. We use the terms interchangeably; the focus here is on cooling overheating rooms.
Will it dim the room?
No meaningfully — modern films reject heat while keeping the room bright.
Is it cheaper than replacing the glass?
Far cheaper — a fraction of the cost of replacing units with solar-control glass, and fitted in a day.
Do you treat conservatory roofs?
Yes — roof glazing is where most conservatory heat comes in, so it's usually the priority. We fit roof and side glazing.
Will it make the room colder in winter?
No. In winter the sun is lower and weaker, and the room's heating does the work. Some low-emissivity films also reflect a little indoor heat back into the room, which helps slightly rather than hurts.
Is it worth fitting on north-facing windows?
North-facing glass gets little direct sun, so there is little heat to reject. We normally focus on south, west and overhead glazing, where the film makes a real difference.
When will I notice the difference?
The heat reduction works as soon as the film is on the glass. A slight haze while the film cures is normal and clears over the following days to a couple of weeks.
What warranty comes with it?
Selected internal films carry manufacturer warranties of up to 10 years. External films have shorter warranties, typically up to 3 years. Our workmanship is guaranteed separately.
Where do you cover?
All of Scotland, based around Edinburgh, Glasgow and Dunfermline.
Related services & areas.
Heat Reduction Window Film across Scotland.
Edinburgh, Glasgow, Dunfermline, Stirling, Perth, Dundee, Aberdeen, Inverness and surrounding areas. Site survey, quote within 24 hours.
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