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Does Putting Plastic on Windows Actually Help With Energy Bills?

Before and after window upgrade during an Exterior remodeling sale by Coastal Windows & Exteriors in Beverly MA.

Plastic sheeting and window film can reduce drafts slightly. However, they’re a temporary fix, not a real solution. Plastic on windows doesn’t address failed seals, damaged frames, or the heat loss that comes from single-pane glass. ENERGY STAR certified windows can reduce heating and cooling costs by up to 13% annually — plastic film can’t come close to that level of performance.