SBS modified bitumen roofing systems are applied through a multi-step process. First, the base layer is prepared, ensuring a clean and dry surface. The SBS modified bitumen membrane is then heated using a torch or hot air, allowing it to become pliable. It is rolled out onto the substrate, ensuring proper adhesion. Overlapping seams are melted together to create a waterproof seal. Finally, a protective layer may be added to enhance durability and UV resistance.