Rafter tails are the extended ends of roof rafters that extend beyond the exterior walls of a building. They serve as a structural support for the roof and provide a base for the installation of gutters.

Rafter tails are primarily made of wood, commonly pressure-treated lumber or cedar, which offer durability and resistance to rot and moisture damage.

Rafter tails are used when the roofline extends beyond the walls of a structure, creating an overhang or eave. They provide a secure mounting point for gutters and fascia boards.

While their primary purpose is structural, rafter tails can contribute to the architectural aesthetics of a building. They can be adorned with decorative elements or cut into unique shapes to enhance the overall design.