Anyone who has a south-facing room with long hours of sunshine knows that it can be costly to replace carpeting, upholstery or draperies damaged by the sun. To protect furnishings from harmful damage caused by the sun and help conceal glare from strong sunlight, consider applying an insulating film on the windows. It may help to lower your heating and cooling costs.

Window film is sold in a variety of lengths and widths that cover most standard size windows and patio doors. You'll find it at hardware stores, home centers and glass dealers. It comes in shades of gray that give the glass a slight tint of a protective coating. The application is easy and is designed for do-it-yourselfers. The job involves cleaning the window, cutting and measuring the film, wetting the glass with a solution, applying the film, removing its backing and then smoothing and trimming the film. The insulating film and concentrate solution for 30 square feet of glass costs about $150. A handyman will charge an additional $166 to install it. By doing it yourself, you'll save 53 percent.

To apply the film you will need a squeegee, spray bottle, utility knife, razor blade, tape measure, transparent tape, paper coffee filters and some bottled water.

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Pro Cost -- DIY Cost -- Pro time -- DIY Time -- DIY Savings -- Percent Saved

$316 -- $150 -- 5.9 -- 7.5 -- $166 -- 53 Percent