As Fletcher-owned DECRA Roofing Systems Inc. commemorates its 50th anniversary in 2007, the company has plenty to celebrate. Sales of DECRA’s stone coated steel roofing products are on the upswing, keeping folks busy at the company’s 104,000-square-foot UL registered ISO 9001:2000 manufacturing facility in Corona, Calif. The company recently opened a brand-new Indianapolis warehouse and moved its Arlington, Texas, warehouse to expanded facilities last October.