A modified flat roof—commonly known as modified bitumen—is a durable, weather-resistant roofing system designed for low-slope and flat structures. It consists of reinforced asphalt layers combined with fiberglass or polyester membranes, creating a strong, flexible barrier against water intrusion. Modified flat roofs perform exceptionally well in areas like Houston where heavy rain, heat, and UV exposure can take a toll on traditional roofing materials. The system is typically installed using heat-welded, cold-applied, or self-adhered methods, forming a seamless, watertight surface that resists ponding water and thermal expansion. This type of roofing is ideal for residential flat roofs, patio covers, and commercial buildings, offering long-term performance, easy maintenance, and cost-effective repairs when properly installed and maintained.