Retail sales, installation and service of Marvin Window and Door Products A company’s heritage is built on vision, determination and an abiding commitment to core beliefs. At Marvin, our heritage of excellence goes back more than a century. It reflects an unwavering dedication to quality, service, innovation and community. That dedication has been passed on through four generations of family leadership. And thousands of our skilled workers have been steeped in our heritage through a lifetime of family connections to our company and the communities we proudly call home.