What kind of energy efficient glass do you offer in your Grandview series windows.
First of all, every 7/8″ insulated glass unit uses Warm-edge Intercept spacers. Warm-edge intercept is one continuous piece creating a stronger, more energy-efficient insulated glass unit. Plus it flexes with glass expansion and contraction to ensure a strong seal for the life of the window. The Grandview window offers 4 levels of insulated glass ranging from dual pane clear glass without Argon gas to triple pane glass with 2 layers of soft coat LowE with Argon fill.
Does Great Lakes Window insulate their frames?
The vinyl mainframes and sash of our Grandview 5000 vinyl windows are filled with patented R-Core (pre-expanded high-density solid-polyurethane insulation), the same type used in many refrigerator/freezer doors. It prevents voids and settling and results in even distribution of the maximum insulating barrier.