Has many of the same qualities as the Casement although it serves a different purpose. The Rusco® awning window is hinged at the top of the frame so it opens from the bottom up. This is the only window that can still receive ventilation in rain or snow. Those who choose the Rusco® Awning window are looking for a clear unobstructed view to the outdoors. The easy-to-use Rusco® Awning window can be fitted with double Pilkington Hard Coat Low E Argon Glass.The double pane unit is 7/8″ thick. Quality to last a lifetime!