Ask Bob Energy Savings Are energy-efficient windows worth the investment?

Are energy-efficient windows worth the investment?

Energy-efficient windows with double or triple panes, low-E coatings, and argon gas fill can reduce energy loss by 25 to 30 percent. However, they are expensive, with a typical payback period of 10 to 20 years. If your existing windows are single-pane or in poor condition, replacement is worthwhile. For newer windows in good condition, weatherstripping and caulking offer better value.

Why It Matters

Windows are a major investment. Understanding the payback period helps you decide whether to replace now or focus on lower-cost energy improvements first.

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