What is typically found on the ends of rafter tails?

The fascia board is typically found on the ends of rafter tails because it serves as a finish for the edge of the roof and provides a surface to attach the roof's overhang. It helps to enclose the rafter tails, which helps in protecting the structural components from moisture and provides an aesthetic transition between the roof and the walls of the building. The fascia also helps to support the gutter system, directing water away from the roof and foundation of the home.

In contrast, the sub-fascia is installed under the fascia board and also serves a supportive role, but it is not the visible component on the ends of the rafter tails. The ridge board is located at the peak of the roof and does not pertain to the ends of the rafter tails. The gable end refers to the triangular section of the wall at the ends of a gable roof, which is not relevant to what is found specifically at the ends of rafter tails. This distinction helps to clarify why the fascia board is correctly identified as being found on the ends of rafter tails.