Home › Top 4 Roofing Contractor in Johnstown, Colorado Find best Roofing Contractor in Johnstown, Colorado, with all necessary contact information, including addresses, phone numbers, working hours, map locations, and website links. Master Roofing LLC US, Johnstown, CO 805344497 Co Rd 44 Blake Roofing LLC. US, Johnstown, CO 80534320 Granite Way Monster Roofing and Exteriors US, Johnstown, CO 805344825 Saddlewood Circle RTC Roofing & Exteriors US, Johnstown, CO 805346342 E Co Rd 18