How to choose solar-control window film
Start by observing the problem: direct sunlight at a desk, glare on a screen or a room that gets hot? Note the time and the side of the building. Use that brief to discuss film selection for your apartment, house or facade in Tbilisi.
DABURE · Published
Separate the room’s needs
Window orientation and glazing properties affect selection. Compare those conditions before choosing one option for every elevation.
- For a workspace, note when sunlight reaches the desk and screen.
- For a living room, decide how much daylight and outside view you want to keep.
- For a facade, compare the appearance requirements on different sides of the building.
Sources: U.S. Department of Energy — Window Types and Technologies
Read the technical sheet
Higher VT means more transmitted daylight; lower SHGC means less solar heat gain. Compare figures for suitable glazing under equivalent conditions.
| Measure | What it describes | Question to ask |
|---|---|---|
| VLT / VT | Visible light transmission | Will the room retain enough daylight? |
| SHGC | Solar heat gain through the glazing | Which glazing configuration was measured? |
| Colour and reflectance | The look from inside and outside | Does the sample suit the facade and interior? |
Sources: NFRC — Visible Transmittance / Solar Heat Gain Coefficient
Light or dark film?
Darkness alone does not describe overall solar-control performance. LLumar, for example, describes spectrally selective films that combine visible light transmission with solar heat control.
Ask to compare options that preserve daylight, give a reflective appearance or match your preferred colour. Weigh the technical figures, appearance and price of the exact models.
Sources: LLumar — Spectrally Selective Film
Check the glazing compatibility
Before installation, identify the glazing type and any Low-E coating and its position. Selection should follow the film manufacturer’s recommendations for that glazing; thermal stress is a reason to check compatibility beforehand.
Sources: IWFA — Film and Low-E glass
Prepare an installation brief
Confirm the included preparation, work on site and aftercare. Agree the exact price and warranty conditions after selecting the material and scope of installation.
- Window photos and an overall facade view.
- Approximate dimensions of each pane and any glazing information you have.
- When glare or overheating occurs and the main purpose of the room.
- Your preferences for daylight, colour and the outside view.
- Access conditions for high or exterior panes.