Performance Roof Systems Inc. announced the 25th anniversary of Derbigum roofing materials.

Performance Roof Systems Inc., Kansas City, Mo., announced the 25th anniversary of Derbigum roofing materials. "Twenty-five years ago we became the first manufacturer to successfully introduce the modified bitumen membrane concept to America. Throughout the growth of modified bitumen membranes in America, Derbigum has stood as the unchallenged leader in quality and innovation. This anniversary milestone gives us the opportunity to celebrate a truly worthy event in roofing membrane history," says Greg Perkins, president of PRS. A host of anniversary activities and events will span the entire year of 2004. The official kick-off occurred at the NRCA 2004 Convention in San Diego.