Ways to Make Old Windows More Energy Efficient

Improving the energy efficiency of old windows can help you save on energy bills, enhance indoor comfort, and reduce your carbon footprint. While replacing old windows with energy-efficient ones is the most effective solution, there are several ways to Replacing inefficient old windows more energy efficient:

1. Weatherstripping: Apply weatherstripping around the window frames to seal gaps and prevent drafts. Weatherstripping materials can include adhesive strips, foam tape, or V-strip gaskets.
2. Caulking: Seal any gaps or cracks around the window frames and between the frames and the wall using caulking. Silicone or latex-based caulks can help reduce air leakage.
3. Window Film: Install window film, particularly low-emissivity (low-E) films, which can reduce heat transfer through the glass. Low-E films can block infrared radiation while allowing visible light to pass through.
4. Window Treatments: Use heavy curtains or insulated blinds to provide an additional layer of insulation. Close these treatments during cold weather to reduce heat loss.
5. Draft Stoppers: Place draft stoppers or door sweeps at the bottom of windows to prevent cold air from entering and warm air from escaping.
6. Window Insulation Kits: Insulation kits include plastic film that can be applied to the window interior using double-sided tape and then heated to create an airtight seal.
7. Shutters or Exterior Blinds: Exterior shading devices like shutters or blinds can help block out sunlight during hot weather, reducing the need for cooling.
8. Reflective Roof Coating: If applicable, consider applying a reflective roof coating to the exterior of your roof to reduce heat gain and improve overall energy efficiency.
9. Seal Window Frames: Seal gaps around the window frames with expanding foam insulation. Be cautious not to overfill, as this could damage the frame.
10. Window Coverings: Use thick curtains or drapes during the winter to provide an extra barrier against cold air. In the summer, keep them closed during the hottest part of the day to prevent heat from entering.
11. DIY Window Inserts: Construct DIY window inserts using clear plastic panels that fit snugly inside the window frame. These can provide additional insulation.
12. Add Storm Windows: If your windows have single-pane glass, consider adding storm windows for added insulation and protection against the elements.
13. Regular Maintenance: Keep windows well-maintained by repairing or replacing any damaged seals, weatherstripping, or glazing.

While these methods can help improve the energy efficiency of old windows, keep in mind that the effectiveness of these solutions may vary based on the condition of your windows and the severity of energy loss. If your windows are severely inefficient or in poor condition, it might be more cost-effective in the long run to invest in energy-efficient replacement windows.