What the numbers on a film sheet mean
- Total Solar Energy Rejected (TSER) is the share of the sun's energy the film keeps out. Higher is cooler.
- Visible Light Transmission (VLT) is how much daylight gets through. A higher VLT means a brighter room.
- UV rejection is how much ultraviolet light is blocked. 3M films block up to 99% of UV, the main cause of fading.
- Always compare these from the maker's data sheet for the exact film and glass type. We'll show you the sheet for any film we recommend.
Which windows to treat first
West-facing windows take the hottest late-afternoon sun in Texas, followed by south-facing glass. Upstairs rooms, game rooms, sunrooms and big back-patio windows are usually where people feel the biggest change. Treating those first gets you most of the comfort for less money.
Will it lower my AC bill?
Blocking heat at the glass means your AC has less heat to remove, which can ease the load in hot rooms. How much you save depends on your home, glass, direction and AC system, so we don't promise a set number.
Glass and warranty checks
Some glass, like certain double-pane or low-E units, needs a matched film so it doesn't get too hot. We check your glass during the free estimate and pick a film the maker approves for it.
Next step
Request a free quote and we'll measure, check your glass and show samples in your own windows.
Last updated October 16, 2026