https://utilityexplained.com/tags/drafty-windows/Recent content in Drafty Windows on Utility ExplainedHugoen-usMon, 31 Aug 2026 00:00:00 +0000https://utilityexplained.com/blog/do-window-insulation-kits-pay-off/Mon, 31 Aug 2026 00:00:00 +0000https://utilityexplained.com/blog/do-window-insulation-kits-pay-off/<h2 id="quick-answer">Quick Answer</h2> <p><strong>A shrink-film window kit pays for itself in one winter if you put it on the two or three draftiest windows in your home — and probably not if you put it on windows that already feel fine.</strong> The kit costs $12–20 for a five-window pack, installs with double-sided tape and a hair dryer, and works by creating a sealed pocket of still air between the film and the glass. Still air is a poor heat conductor, so the layer slows the loss that makes a cold window feel like an open refrigerator door. [1][4]</p>