How do BUR materials differ from those used in EPDM roofing?

BUR (Built-Up Roofing) materials are characterized by their use of multiple layers of bitumen and reinforcing fabrics. This traditional roofing method involves alternating layers of bitumen and felts or fabrics, which create a robust, durable system designed to provide excellent weather resistance. The emphasis on layers contributes significantly to the structural integrity of BUR roofs, making them well-suited for a variety of environmental conditions.

In contrast, EPDM (Ethylene Propylene Diene Monomer) is a single-ply roofing membrane. It is manufactured as a continuous sheet, allowing for easier installation and effective waterproofing. While EPDM is known for its durability and resistance to UV light and ozone, it does not rely on the multi-layered approach that BUR systems do.

Understanding the differences in construction and layering between BUR and EPDM helps explain their respective characteristics, such as installation techniques, durability, and overall performance in different roofing applications. This distinction is particularly important for roofing professionals when deciding on the appropriate material for specific climate conditions or building types.