Will tinting my windows keep my furniture from fading?

Window film will not completely eliminate fading, but installing it is one of the best things you can do to block the factors that cause it. Window film blocks 99% of UV rays, which are responsible for about 40% of the fading equation. Heat makes up about 25%, visible light about 25%, and miscellaneous factors bring home the final 10%. Short of keeping your home furnishings in darkness, window film is your best defense against fading.