PVC Fascia Boards
PVC fascia boards are the upright boards running along the bottom of the roof that gives the roofline. The fascia board is multi functional as it hides the ends of the roofs rafters and holds the guttering to catch the rainfall from the roof. To completely enclose the roofline from the elements, the fascia board is boxed off with a soffit board between the bottom of the fascia board and the wall. Fascia is a term which generally describes any horizontal surface which spans across the top of columns or across the top of a wall.
The word fascia is specifically used to describe the horizontal "fascia board" which caps the end of rafters outside a building, which can be used to hold the rain gutter. The finished surface below the fascia and rafters is called the soffit or eave.