In modern use, the fascia (or fascia board) of a building is the horizontal board fixed to the edge of the roof’s Rafters where these form the eaves of a building, or with flat-roofed buildings, boards fixed to the junction of the roof and the walls.
Fascia boards may be either made of wood or uPVC, the latter now being popular as it is maintenance-free and does not require painting.
On buildings with sloped roofs, the fascia board stops water penetration into the end-grain of timber rafters. Brackets to support guttering are fixed to the fascia.
Fascia boards on flat-roofed buildings may be necessary to anchor the roofing material, and stop wind and rain penetrating between the roof and the walls. It may also be fixed for decorative reasons.
A survey report will show any visible problems to fascias, such as damage or decay particularly to timber fascia boards, which may require attention.