Fascias
The fascia board is the long, straight board that runs along the lower edge of the roof.
The fascia is fixed directly to the roof trusses and usually does all the work of supporting the bottom row of tiles and carrying all the guttering. This is no mean feat, especially when it is raining hard. In a downpour the roof of a 3-bed semi-detached home could be washing several gallons of water per second into its gutters.