Cascade Windows -

: The space between glass panes is filled with non-toxic argon gas to reduce heat transfer.

Cascade windows aren’t for every home—but for the right project, they’re a game-changer. They sit at the intersection of minimalist design and high-performance engineering. If you’ve ever wished your sliding door opened wider, stayed cleaner, and sealed tighter, a cascade window might be the upgrade you didn’t know existed. cascade windows

Details on where to find or installers in your area. : The space between glass panes is filled