CertainTeed Windows come in a broad range of sizes as well as custom sizes in order to satisfy the needs of homeowners. The interior colors available for the vinyl replacement windows include natural oak, white, colonial cherry, almond and hillside oak and the exterior colors are bronze, almond and white. As with BrynMawr III windows, the NewCastle III series features Energy Star glass packages, with triple pane and double pane glazing that has a selection of thermal insulation options. This includes the patented Thermaflect glazing package.