Questions about this project
Can old window film be removed and replaced? Yes. On this project we removed the old, failing film from 72 solarium panels, prepared the glass and installed new film.
How much heat does Slate 10 block? Solar Gard rates it at 76 percent total solar energy rejected on 1/4 inch single clear glass and 64 percent on 1/4 inch double clear glass. Actual results depend on the glass, the direction it faces and the building.
Will a dark film make the room dim? Darker, yes: Slate 10 lets through 13 percent of visible light on 1/4 inch single clear glass, which is what cuts the glare. It suits a sun-filled room like a solarium, where the light is too strong. At night, with the lights on inside, people outside can see in more easily; see Does Privacy Window Film Work at Night?
What do the ratings mean? We explain total solar energy rejected, glare reduction and the other ratings in our window film performance terms guide.
For another heat and glare project with a Slate film, see the Costco Glenview case study. See our solar control window film service, or request a free assessment.
Sources: AAA Glass Tint project records, 2026; Solar Gard, Panorama Slate 10 data sheet, SK0314PANSL1 09/20. Figures are manufacturer ratings calculated with NFRC methodology on the glass named; results on other glass differ. Reviewed by David Johnson, owner of AAA Glass Tint. Last updated October 13, 2026.
