Windows and doors
Suspended-film insulating glass windows - A definitive guide for these high-performance windows
...double-glazed window that weighs less than the highest-quality triple-glazed window, yet has at least a third air chamber and a slightly higher R value.
In some cases, suspended-film windows could be just the answer for the highest-performance windows in a cold climate zone or a hot climate zone. They can weigh less, c...