Protect your investment with an affordable maintenance program. We developed a roof maintenance program that helps you get the maximum life out of an existing roof system. Maintenance is so critical to the upkeep of a roof system that many manufactures require maintenance two times a year in order to keep warranties valid. At MAG Roofing, we help commercial property owners throughout the Houston area maintain and repair their roofing systems. Our maintenance program was designed to meet the standards required by many roofing manufacturers to maintain the warranties on their roofing systems.