Installing window film could void your window warranty. When in doubt, check the manufacturer’s literature for your windows to identify a compatible window film.ģ. Insulated glass that is over 10 years old or has had seal failures.Clear annealed glass thicker than ⅜-inch or that has a heat absorption rate of more than 50 percent. However, the International Window Film Association recommends avoiding solar film in the following situations because the film’s higher rate of heat absorption can increase the thermal stress so much on these types of window glass that they crack: Unless your manufacturer discourages it, you can usually apply them to all three common types of window glass-annealed (basic flat glass), heat-treated (annealed glass that has been exposed to high temperatures), and insulating (consists of two layers of glass with an intervening layer of air or gas)-with minimal risk of damage to the window glass. Most security and decorative films block minimal heat and therefore don’t place much thermal stress on the windows. Not all types of window film are compatible with all types of window glass.Īs noted in the section above, different types of window film absorb varying degrees of heat, which some windows are equipped to handle and others… not so much. It’s sold as a clear or bold colored film in a variety of etched patterns (such as stripes), stained glass motifs, or opaque frosted designs that keep out peering eyes.Ģ.
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