Can I Add Argon to My Existing Windows?

Energy Efficient Window Composition

• Double-paned windows feature two panes of glass separated by a warm edge spacer. This spacer runs the length of the window glass and terminates at the outer seal. The outer seal is usually composed of long-lasting and dependable synthetic materials, but these materials vary depending on the manufacturer. The window frame material also varies by manufacturer and model. Options include aluminum, wood and plastic. The window panes themselves are coated with a low-emissivity treatment. This treatment helps to prevent heat from escaping the home and cold from entering it. Energy efficient double-paned windows can be filled with air or argon but argon windows are more effective.

Window Seals

• Double-paned windows are manufactured and sold as double-paned windows. Double-paned windows cannot be created with two, separate single panes. The seal between the panes is difficult to replicate without the risk of allowing condensation or other materials to enter the space between the panes. Argon gas is pumped into the window at the time of manufacture. The gas stays within the frame for the life of the window. Some seal materials may not be as durable as others and argon leaks can occur. When these leaks happen, the life of the window is not considerably reduced unless the seal is noticeably damaged. A small leak, of 5 percent per year, will reduce the window's effectiveness by only 12 percent over 20 years.

Other Options

• Single-paned windows and air-filled double-paned windows can benefit from the addition of storm windows. Storm windows are an economical alternative to energy-efficient gas-filled windows. Choose storm windows with a low-emissivity coat for the greatest heat retention. Improve your window's insulation by checking seals for cracks and drafts, then adding caulk as needed. Interior plastic is another method of improving insulation.

Considerations

• Other types of energy-efficient windows feature triple-panes but they can be bulky and non-economical. A low-emissivity coating on a double-paned window can be as effective as an additional pane. Low-emissivity coatings consist of a microscopic layer on low-e glass. This microscopic layer is far less bulky than an additional glass pane.