What term is commonly used for a roof drainage system installed along the edge of a roof?

The term commonly used for a roof drainage system installed along the edge of a roof is eaves trough. Eaves troughs, also known as gutters, are designed to collect rainwater that runs off the roof and direct it away from the building's foundation. This helps to prevent water damage and erosion around the base of the structure.

Eaves troughs are typically installed along the perimeter of a roof, at the eaves, and are often coupled with downspouts to channel the collected water down to the ground or into a drainage system. The effectiveness of eaves troughs in managing roof drainage is essential in protecting the building from potential water-related issues.

The other options, like the drip edge, downspout, and flashing, serve different purposes within the roofing and drainage systems. The drip edge is a metal strip installed along the edges of the roof to help direct water into the eaves troughs. The downspout is the vertical pipe that carries water from the eaves troughs down to the ground or drainage outlet. Flashing is used to prevent water penetration at joints and roof penetrations, such as where the roof meets walls or around chimneys. While all these components contribute to an effective drainage system, eaves trough specifically