With state-of-the-art fiberglass technology unlike any other, Integrity utilizes pultruded fiberglass called Ultrex. Ultrex proves itself to be of higher performance and durability over vinyl, aluminum and other fiberglass composites. Integrity can be maintained with little effort from you, meaning that these windows are not only a product of the highest quality, but also a product built tough to perform and last through even the roughest conditions. JB Sash is the #1 Integrity dealer in New England. Not only are we the largest dealer but we provide unmatched customer service, before, during and after the sale. Visit our new showroom and design center to see a wide selection of Integrity options and consult with our trained professional sales staff about your window and door project.