The 6000 is our superior replacement window option. It is only available in the double hung style. The 6000 features double strength glass, which measures 3.0 mm thick (compared to single strength glass, which measures 2.2 mm thick). The Limited Lifetime Non-Prorated Glass Warranty, which includes glass breakage, is standard with the 6000. The 6000 features a 3 overall frame size and lead-free designer composite cam locks and keepers with a child safety lock option.

This window features an extruded screen frame with a no-show screen spline. A BetterVue screen mesh is standard, but you have the option to choose an aluminum mesh at no extra charge. These windows feature the SuperSpacer Warm Edge Glass System that provides thermal performance, durability, mold prevention and sound absorption. SuperSpacer lasts five times longer in durability tests than single-seal units because it is sealed with butyl. Butyl is a watertight seal that can withstand extreme temperatures.