Modified bitumen flat roofing is applied using a multi-step process. First, the substrate is prepared to ensure proper adhesion. The modified bitumen sheets, which contain polymers for enhanced flexibility and durability, are then rolled out. They can be installed using torch-down, cold adhesive, or self-adhesive methods. Heat or adhesive activates the bonding, ensuring a watertight seal. Finally, seams are carefully sealed to enhance waterproofing and durability, providing a robust roofing solution.