IWR North America, headquartered in St. Louis, Mo., is one of the longest standing specialty contractors in the United States with a focus on being a true building enclosure partner. Working coast to coast since the 1940s, the ABAA-certified contractor installs products ranging from the simplest to the most complex designs in virtually every industry. IWR is a subsidiary company of MHS Legacy Group, a St. Louis based holding company with roots dating back to 1895. For more information, call 314-633-4958. UPDATED WEBSITE COMING SOON!