In Australian commercial construction projects, a fascia board is a horizontal or vertical board attached to the lower ends of the rafters, providing a neat finish and a place to attach guttering . It forms the termination of the roof to which the gutter is attached and is visible from the outside .

n Australian commercial construction projects, a fascia board is a horizontal board that is mounted at the edge of the roof. It serves several purposes:

1. Aesthetic Finish: The fascia board provides a finished look to the roofline, covering the ends of the roof rafters and giving the building a neat and tidy appearance.

2. Support for Gutters: It acts as a support for the guttering system. Gutters are typically attached to the fascia board, which helps in directing rainwater away from the building, protecting the structure from water damage.

3. Protection: The fascia board helps protect the roof and the interior of the building from weather elements by sealing the roof edges. It prevents water ingress and potential damage to the roof structure.

4. Ventilation: In some designs, the fascia board can also play a role in roof ventilation, allowing air to circulate and preventing moisture build-up in the roof space.

Fascia boards are typically made from materials like timber, metal, or PVC, depending on the specific requirements of the project, such as durability, cost, and aesthetic preferences. In commercial construction, the choice of material may also be influenced by considerations of maintenance and longevity.