With a history of innovation and relentless commitment to quality, Great Lakes Window has maintained a reputation for manufacturing world-class products.

Quality that has been tested and certified by independent industry organizations including the Window & Door Manufacturers Association and the National Fenestration Rating Council. Not to mention that our units with optional multilayer, vacuum-deposition, soft-coat Low-E glass have earned the ENERGY STAR. That means they’ve met the strict energy efficiency guidelines set by the U.S. Environmental Protection Agency and the U.S. Department of Energy.

For detailed test results on our windows’ technical performance, including U-value, design pressure, air infiltration and forced entry resistance, choose a product line then click on “Features and Benefits.”