Bituminous membranes are waterproofing materials made from asphalt or bitumen, often reinforced with fiberglass or polyester. They are commonly used in construction to protect roofs, foundations, and other structures from water damage. These membranes can be applied in various ways, including torching, self-adhesive methods, or cold application. These membranes are known for their durability and flexibility, making them suitable for different climates and conditions. They can also be combined with other materials for enhanced performance. Overall, bituminous membranes are a reliable choice for ensuring long-lasting protection against moisture and leaks in buildings.