Established in 1978, R&R Window Contractors Inc. sells, installs and services a broad range of commercial window, storefront and curtainwall systems, from traditional styles to custom designs. Based in Easthampton, Mass., it also provides unusual colors, shapes, extrusions and muntin patterns for historical restorations. The company specializes in estimating, design and engineering, project management, production, installation and administration. Some of its projects include Wilbur Fisk Hall at Wesleyan University, Mass Venture Center, Harrison S. Kravis House and 50 Minuteman Road-Picturetel II.