Why sealing air leaks is more efficient than replacing old windows
In short: Before spending thousands on new windows, you can significantly improve your home's energy efficiency by addressing drafts. Experts from This Old House demonstrate how to insulate existing frames using cost-effective materials and techniques.
The video explores why homeowners should prioritize sealing air leaks around window frames before considering full replacements. While modern walls typically have an R-value between 13 and 20, older single-pane windows often only provide an R-value of 1 to 2. By reducing airflow and leakage, residents can drastically increase comfort and energy savings.
The team highlights several specific methods for interior sealing, including the use of caulk, weather stripping, and shrink wrap. They also discuss traditional solutions like storm windows—specifically screw-in aluminum models with removable glass—as a viable way to create a larger thermal barrier during winter months.
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Sources
- Summary by Intellect · source: Window Air Sealing Techniques | Ask This Old House
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