The fascia board is the long, straight board that runs along the lower edge of the roof. The fascia is fixed directly to the lower ends of the roof trusses and usually does all the work of supporting the lower edge of the bottom row of tiles.
A fascia board is technically part of the roof system of a house, but from the ground, it looks like part of the wall. Its purpose is to cover the ends of the roof rafters and because that’s where water drains off the roof the gutters are often attached to it. The fascia board has to be resistant to moisture and rot or it won’t last long.
The word fascia derives from Latin fascia meaning “band, bandage, ribbon, swathe”. The term is also used, although less commonly, for other such band-like surfaces like a wide, flat trim strip around a doorway, different and separate from the wall surface.
The horizontal fascia board which caps the end of rafters outside a building may be used to hold the rain gutter. The finished surface below the fascia and rafters is called the soffit or eave.
What type of material are fascias made from?
It makes sense to use wood for the fascia if your house has wood siding but it’s also a common material on houses with brick, stone or other types of siding. If you choose wood, it must be treated to be rot resistant and painting it can also help weatherproof it.
A PVC fascia board is constructed to look like wood, even though it’s made from the same material as plumbing pipes. It has a clear advantage over wood when it comes to rot resistance. It’s most appropriate for houses with brick or stone siding. PVC fascia boards come in a variety of colors and it’s paintable.
PVC expands more than wood, builders usually glue the joints and use headed nails rather than finish nails to fasten them.
What is the function of a fascia?
It would not be surprising if a significant number of homeowners could not identify which area of their home contained the fascia; some might believe that it must be somewhere on the front of the house (because the word sounds like face or facing) while others may be convinced that it is found inside the home – perhaps the front/façade of the kitchen or bathroom cabinets.
In fact fascia trim or board is used in conjunction with a soffit, which is the material that covers the undersides of the eaves running from the tops of the exterior walls to the outer edges of the roof system.
Fascias serve the following purposes:
- They are used to secure the gutters to the roof and keep them in place.
- Block water from penetrating the roof deck and into the attic/home.
- Increase curb appeal by covering the open/rough ends of the rafters.
- Close off unwanted access to the home to insects, birds, squirrels, etc.
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