Windows and doors made by Great Lakes stand apart from the competition as premium products made using state-of-the-art technology, modern equipment, and cutting edge operational techniques. Their 6-acre, 500,000-square foot manufacturing and office facility currently houses over 450 employees who serve the more than 750 active Great Lakes Window dealers and distributors. Great Lakes Window has now custom-made more than eight million vinyl replacement windows and doors for homeowners in 48 states.

Great Lakes Window is dedicated to helping its dealers and distributors separate themselves from the competition through the availability of outstanding marketing and sales tools including support literature, branded sites and educational seminars.  Great Lakes provides its customers with the fundamentals necessary to extend the benefits of its products to homeowners.

Great Lakes Window products are run through rigorous energy efficiency and quality testing by the National Fenestration Ratings Council (NFRC) to determine how well they prevent the transfer of heat through the window unit.  In addition, Great Lakes Window has been awarded Hallmark certification from the Window and Door Manufacturers Association (WDMA) which tests performance ratings for air infiltration, water penetration, structural load and forced entry resistance. Windows featuring Great Lakes Window premium glass options earn the ENERGY STAR® by meeting the strict energy efficiency guidelines set by the U.S. Environmental Protection Agency and the U.S. Department of Energy. ENERGY STAR qualification is based on NFRC certified product ratings.