Great Lakes® Window has spent decades developing the highest quality vinyl replacement windows and patio doors homeowners can ... find. Under the parent company, Ply Gem, which has over 70 years of experience in the building products industry, Great Lakes Window is able to bring innovative solutions in design, performance and function that go above and beyond expectations. We believe our products are only as good as the people who sell, design and manufacture them. We only work with the best home improvement professionals to bring quality replacement windows and doors into homes nationwide. At Great Lakes Window, we serve as an extension of your team by offering flexible product lines with customizable options, as well as access to the experience, resources and support you need to drive sales. Our history and stability means peace of mind knowing that we will be here to honor your customers’ warranties for years to come. DISCLAIMER: Great Lakes Window's social media channels share information about our company, our products and our people. We welcome commentary expressing all points of view – positive and negative – but reserve the right to remove posts that are off-topic, offensive, promotional or illegal or contain inappropriate language, hate speech, proprietary information, personal data or personal attacks. read more