Wimsatt Building Materials Corporation is a distributor of quality building products that include residential & commercial roofing, siding, windows & doors, and composite lumber. As Michigans largest distributor of residential roofing products, we offer a large selection of shingles with over 500 colors and styles in stock. We also offer peerless rooftop delivery backed by a rigorous safety program, will-call order fulfillment, and marketing support materials, for our customers - the contractors, builders, and remodelers of Michigan. the Wimsatt Grand Rapids story: After several years of serving the contractors of Western Michigan out of the Lansing Branch, Wimsatt opened a branch in Grand Rapids in 2014. Based in Wyoming, the branch services the Greater Grand Rapids area, as well as Kalamazoo and up and down the lakeshore.