Another opportunity to improve the building envelope of an existing building, although expensive, is to replace existing windows with more energy efficient double pane windows. Or instead of complete window replacement, consider adding another single pane. It is also important to consider adding storm doors to entryways to prevent energy loss at this active area in the building. For new construction there are new Energy Star-rated window technologies that are designed for energy efficiency and the prevention of heat loss. Learn more about Energy Star windows.
Other Ways to Solve Energy Loss
There are many other areas in a building that can be the source of energy loss. Every building should also be checked for air leaks near electrical boxes and outlets, plumbing and ceiling fixtures, attic hatches, and other locations where it is possible for air to pass outside.
If any of these areas show signs of air leaks it is necessary to caulk, seal or weather-strip in order to prevent energy loss. For additional reading see Maine Home Performance Technical Standards and EPA's Do-It-Yourself Guide to Sealing And Insulating with Energy Star (PDF).
- U.S. DOE Energy Efficiency and Renewable Energy. 2006 May 30. Air Leaks and Sealing. Accessed August 2008.
- U.S. DOE Energy Efficiency and Renewable Energy. 2008 June 3. Building Envelope. Accessed July 2008.
- U.S. DOE Energy Efficiency and Renewable Energy. 2006 May 31. Windows. Accessed July 2008.