What is the required fastener repair procedure for modified bitumen membranes?

The correct answer pertains to the proper repair protocol for fasteners used in modified bitumen membranes, which specifically requires that any repairs be done in an area that extends 8 inches in all directions from the damaged fastener. This standard is established to ensure comprehensive coverage and sealing of the area, preventing leaks and maintaining the integrity of the roofing system. The 8-inch radius provides enough overlap to ensure that any damage to the membrane or bonding is adequately addressed, thus mitigating potential issues such as moisture intrusion.

In contrast, the other specified distances—4 inches, 6 inches, and 10 inches—do not adhere to the established best practices for the repair of these types of roofing systems. A smaller coverage area may not sufficiently encompass potential damage or create a secure seal, while a larger area could lead to unnecessary use of materials and labor without proportionate benefits for the roof's functionality. Therefore, the requirement of an 8-inch repair procedure around fasteners is based on achieving a balance between effective repair and resource efficiency within roofing maintenance practices.