Every Window Creates Heat LossEven windows in good repair are naturally affecting your home’s efficiency—on average, they are responsible for 25% of all energy loss.
- Single-Paned Windows: Single-paned windows are quite common in the tract houses around Woodland that are reaching 15 and 20 years old. Even intact, they are inefficient compared to more modern options, creating extra energy costs of up to $465 a year.
- Older and Historic Windows: Original windows in historic homes are some of the least effective at insulating a house against heat loss as their sealing can shrink and deteriorate, allowing air to pass more freely from the outdoors in. Crumbling window seals also let in more noise and more pollen—an important factor for our allergy-prone residents.
No Such Thing As a Little CrackWhether it’s the neighbor kid’s bb gun, a hairline crack, or a broken pane in a double-paned window, lots of people don’t replace cracked or chipped windows unless they’re totally broken. But that gets expensive. Here’s why:
- Single-Paned Windows: Cracked single-paned windows may still keep out the elements, but they lose a lot of their insulating ability. This is especially true if there’s a gap in the window—if part of a pane is missing, it’s like having an open wound that bleeds energy efficiency. The insulation factor of a broken window is next to none.
- Double-Paned Windows: The energy efficiency of double-paned windows depends on the layer of insulated air between the panes—it takes longer for this air to heat up or cool down, meaning that heat passes more slowly through the window. If one pane is cracked or broken, you now have the efficiency of a single-paned window.
- Gas-Filled Windows: Gas-filled windows are susceptible to any crack or damage that can release the gas and destroy their ability to regulate heat loss. Usually filled with argon, once this gas is released, they are also no more efficient than a single-paned window.