What is the recommended method for joining hanging gutter sections?

The recommended method for joining hanging gutter sections is lapped/soldered with sealant and riveted. This approach ensures a strong, watertight connection that can withstand various weather conditions. By using a sealant in conjunction with the lapping and riveting process, the joint is protected from leaks, which is critical for the effective management of rainwater.

When gutters are properly sealed and secured, they can direct water away from the building's foundation, preventing potential damage over time. The combination of soldering and using sealant not only enhances the durability of the joint but also provides added strength against high winds and heavy rainfall, making it a reliable choice for long-term gutter systems.

Other methods, such as simple overlaps, may not provide a sufficient seal against leaks, compromising the efficiency of the gutter system. Keeping sections separate with no fixings does not offer any structural integrity or the necessary joint to direct water efficiently, while welding without sealant may lead to potential weak spots and failure in certain conditions. Therefore, choice B represents the most reliable and effective method for joining hanging gutter sections.