Most of your new window is glass...that's why we feature our windows with the BEST WINDOW

BW-ComforTech Warm Edge Glazing System featuring Super Spacer on all Platinum and Gold Series windows. This offers you reduced heat loss, warmer glass temperature and reduced interior condensation. All our BW-ComforTech products have passed stringent testing and are IG Certified to insure our seals are durable and will not leak.