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When buying new windows, you want to make sure you’re investing in high-quality products. Windows from Great Lakes Window are affiliated with ENERGY STAR, the Window & Door Manufacturers Association, the National Fenestration Rating Council, the National Accreditation and Management Institute, and a member of the United States Green Building Council. You can trust that the windows and patio doors you purchase from us are built to last from years to come.
Great Lakes Window is proud to be an ENERGY STAR® Partner. That means our windows meet the strict energy efficiency guidelines set by the U.S. Environmental Protection Agency and the U.S. Department of Energy. The result? Windows that help the environment and can help reduce you energy bills.
Window & Door Manufacturers Association (WDMA), an organization that defines and advances the standard of excellence among residential and commercial windows and doors.
National Fenestration Rating Council, a non-profit organization that provides energy performance ratings and determines fenestration code compliance, also certifies us.
We meet the National Accreditation and Management Institute’s (NAMI) certification standard for air, water and structural performance.
We’re also a member of the United States Green Building Council (USGBC).