Upgrade to energy-efficient windows

Why? You can prevent air leakage by improving the efficiency of your windows. While it may not be cost effective to replace your windows based on energy savings alone, there are lots of other benefits from new windows, including comfort, security, noise reduction, and aesthetics. 
What to look for:
  • ENERGY STAR® certified windows. These are the most efficient option. ENERGY STAR certified windows, doors, and skylights can reduce your energy costs by 12%.
  • The NFRC® label. Comparing the label across window models, look for the following:
    • A low U-value, which indicates the window insulates well.
    • A low solar heat gain coefficient, which shows the window effectively resists unwanted heat gain.
    • A low air leakage value, which indicates the window reduces drafts.
    • A high visible transmittance value, which is good for letting natural light in.
  • The right materials. For the frame and sash materials, wood, vinyl, and fiberglass are more insulating than aluminum.

Added benefits: If you have inefficient windows, chances are you will see fog or frozen water on your window pane or pooled water on the window sill. Over time, chronic moisture can create mold problems and other property damage. More efficient windows keep the glass and frame warmer and have fewer moisture-related problems.

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