Composite Fascia Boards Installation Guide for Decking

Composite fascia boards are specialised components used in decking to cover the edges and perimeter of the deck, providing an attractive, seamless look and hiding the underlying substructure. But they are not limited to decking alone. They can be used in various other outdoor projects, such as stair risers, planter boxes, and other structural elements that require a finished edge. Their versatility and durability make them a popular choice for both residential and commercial applications.

EnviroBuild composite fascia boards are made from a blend of recycled wood fibres and plastic, and unlike wooden fascia boards, they are incredibly durable and low-maintenance. Have a look at our

complete guide to composite decking to discover why this type of decking could be an excellent choice for you.

At

EnviroBuild, we provide a variety of fascia board colours and fascia board dimensions throughout London and across the UK, and our fascia boarding is available in two ranges:

Explorer or

Frontier. Order your free

Explorer and

Frontier sample packs today to help you decide which profile and colours to choose.

Composite fascia boards are an ideal option for those looking for a low-maintenance, durable solution to enhance their decking projects. These boards are easy to maintain and offer benefits such as anti-rot and anti-splinter features, ensuring a safe and enduring finish. With a

warranty of up to 25 years, they are designed to stand the test of time. They are an eco-friendly choice, made from 87% recycled materials and manufactured using 100% wind energy, making them a sustainable addition to any outdoor space.

When installing composite fascia boards, you need to ensure there is a suitable ventilation gap, as this provides enough airflow around the base of the deck. Since composite decking includes

cellulose fibres, it can absorb a small amount of moisture. Wood rotting typically happens when it remains in contact with moisture for prolonged periods without adequate drying time. To prevent this, it is essential to leave a gap between the deck boards and the underlying surface—whether it's a concrete slab, base, or turf. This gap allows for proper airflow, enabling composite timber joists and deck boards to drain and dry thoroughly.

The following recommendations should be followed for composite fascia board:

Ensure you leave appropriate expansion gaps where the fascia board ends meet (minimum 0.2% of the board length) so that the fascia boards have space to expand and contract in hot and cold weather. This will prevent any damage to the boards.

The installation of decking fascia boards is relatively straightforward and made even easier by watching our detailed video above. With the use of our

trusted installer network we can help put you in contact with a professional installer in your area if you prefer not to handle the installation yourself.

Equipment you will need:

Pre-drill 4 millimetre countersunk pilot holes through the fascia board to prevent the material from splitting.

Line up the top fascia board edge with the top of the decking to hide the decking edge that is grooved.

Fix the board in place with 50 millimetre countersunk screws.