Exclusive Vinyl Window Series

STG450 Series
The STG450 Series features a deeper frame of 4½” and can accommodate the FlexScreen option. Its unique design also incorporates a proprietary internal ventilation system that helps reduce material overheating. The deeper frame makes this Series suitable for renovation projects, custom homes, and construction projects in general.


Prima Series
The Prima Series comes with a frame depth of 3¼”. This Series is used for renovation projects with limited wall thickness. With a variety of options and accessories, the Prima Series can also be an optimum solution for new construction applications.






Both Series accommodate double and true triple glazing options. Complete ROTO hardware systems, options, and accessories are standard for both series. Your window consultant will guide you toward the best option for your project.
Covered by Stage Windows Warranty
Lifetime warranty on white vinyl frame and vinyl sash members
20-year limited warranty on insulating glass
15-year limited warranty on hardware
15-year limited warranty on painted windows
Fully transferable warranty at no charge























