BELMONT, Calif.--(BUSINESS WIRE)--RingCentral, Inc. (NYSE: RNG), a leading provider of cloud business communications solutions, announced today that Tecta America, the largest commercial roofing contractor in the United States, is enabling its 50+ nationwide locations with a flexible, reliable communications system for its customers and staff by switching to RingCentral. Tecta America is a national company with over 2500 employees. As the premier roofing contractor in the United States their of