Fascia Boards

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Fascia Board

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. The fascia board also carries all the guttering.  The fascia board is the one mounted at the point where the roof meets the outer walls of the house and is often called the roofline. However most people refer to it by the name of the main board that carries the gutter – the fascia or fascias.

This is no mean feat, especially when it is raining hard. In a downpour the roof of a 3-bed semi could be washing several gallons of water per second into its gutters.

Bargeboard

This is the board that is used on the gable end of a house. The condition of the bargeboard can often make or break the look of a house, and over the years it has evolved into some very attractive shapes.

Soffit

The soffit board is tucked away under the fascia board. It is usually the board that you see most of from street level. The soffit can be ventilated to allow the flow of air into the roof area. Alternatively, ventilation can be provided over the top of the fascia board. Many people prefer the latter solution these days. Without adequate ventilation, condensation will form in the roof void increasing the risk of timber decay.

Boxend

The Box End can be a work of art, accommodating as it does the many different angles, planes and heights of the fascia, soffit and bargeboard at each corner of the house where there is a gable end.

The descriptions uPVC, PVCu and PVCue are often used to describe PVC fascias, soffits and bargeboards. You probably know what PVC means. The “u” stands for “unplasticised”, meaning that it isn’t a pliable PVC like some kids toys etc, and the “e” stands for “expanded”. Expanded or foamed PVC produces a light, strong board that is thicker than an equivalent rigid PVC board.

How to measure soffits and fascia

The final phase of building or replacing a roof is affixing the soffit and fascia to the edge of the roof. When a roof is placed on a building, it is supported by joists. The joists are spaced approximately 2 feet apart along the length of the roof. The point at which the joist meets the exterior walls of the building leaves a gap that is open to the outside environment. This gap is sealed from the outside during the final stages of the building project.

The open section that runs horizontal to the ground is covered and sealed with a soffit and the end of the joists are covered by fascia. Another common term for the soffits on a building is eaves. Proper planning is vital to order the required amount of material. The procedure of measuring the edge of the roof is not complicated and you can perform it physically with a tape measure or on building plans by measuring the length around the perimeter using a scale model. You can measure the amount of soffit required based on the amount of fascia needed.

Fascia boards newly fitted Soffits installed Roofing plastics

Step 1

Calculate the perimeter of the building using the measurements taken with a tape measure and a helper. Measure the distance of each part of the roof. The fascia of the roof is the piece of wood or siding that seals the end of the supports. If measuring the distance from a scale drawing, obtain the final distance by using the correct conversion factor.

Step 2

Check the perimeter size by taking the raw dimension of the building and adding the number of feet to obtain the extended area of the roof at the corners of the structure.

Step 3

Calculate the material required for the soffit. The amount of soffit material required will equal the amount of fascia with the addition of the area of each corner on the building.

Step 4

Report the length of fascia in the widths you need. Typical widths of fascia are 6 and 8 inches. As a rule of thumb, always order 10 percent more material than calculated to ensure you have enough material.

Step 5

Report the amount of soffit required as the number of squares required. The number of squares will depend on the width of the soffit material. Order 10 percent more than required to allow for mistakes. The soffit is always measured in area units.