Our skylights have a Triple Glazed Skylight Windows that consists of soft coat low-e insulating glass on the top and middle and thermally toughened top and middle panes. The term “triple glazing” refers to three glass panes that are separated by argon gas. More than doubling, this most recent advancement in window insulation goes one step farther. Compared to normal double-glazed skylights, the overall insulation performance with this glazing choice is up to 55% better.