Which material may be applied directly over low slope metal roofs?

EPDM (Ethylene Propylene Diene Terpolymer) is a synthetic rubber roofing membrane that is ideal for low slope metal roofs due to its excellent durability, weather resistance, and flexibility. This material is specifically designed for low slope applications, making it compatible with the unique characteristics of metal roofs. Its ability to withstand extreme temperatures and UV exposure allows it to perform well in various weather conditions.

Unlike some materials that may require additional underlayment or special installation techniques due to their weight or structural requirements, EPDM can be applied directly to metal surfaces. This not only simplifies the installation process but also enhances the watertight integrity of the roofing system.

In contrast, the other materials listed may pose challenges or are not suitable for direct application on low slope metal roofs. Modified bitumen, for instance, typically requires a built-up system or other surfaces to ensure proper adhesion. Asphalt shingles are generally intended for steep-slope applications and may not perform effectively on low slope surfaces. Slate, being a heavy material, necessitates a support structure that typically isn't present on low slope roofs.