Decking boards cover the walking surface, but the exposed sides and steps need their own finishing plan. Edge trims, fascia boards and step edges have different shapes and roles. Choosing them while you plan the board layout helps avoid awkward joints or missing pieces at the end of the job.
Start by drawing the deck and marking every visible edge. Separate horizontal edges from vertical faces, then note any steps. You can then check the appropriate parts in our composite accessories collection.
Edge trims: a finish for exposed board edges
An angle or L-shaped trim can cover an exposed edge where it is compatible with the chosen decking detail. Check both legs of the profile, its available length and the fixing instructions. The trim is a finishing component; it should not be treated as a substitute for supporting the boards beneath it.
The catalogue includes Woodgrain trims in selected 3.6m and 4.8m lengths, plus trims for Classic, Eco, Wide Max and Co-Extrusion decking. Choose by range and profile as well as shade. “Grey” or “Teak” in two product names does not establish an exact colour or dimensional match.
Fascia boards: covering the vertical face
Fascia is used to finish visible deck fronts, risers and exposed framework where the installation detail allows. Standard Woodgrain fascia products are listed at 3.6m long, 14cm wide and 1cm thick. Wide Max fascia is a separate range with 3.66m lengths; check its own product dimensions.
Measure the face height as well as the run length. A fascia board's width limits the face it can cover in a single piece. If the deck edge is taller, ask for an appropriate detail instead of assuming one board will conceal the entire framework. Keep the supporting structure and ventilation requirements in the installation plan.
Step edges: checking the return and board fit
Woodgrain step-edge products have a shaped return for finishing a compatible step or deck edge. The listed standard profile is 140mm wide with a 50mm return and 24mm thickness. Selected products come in 3.6m or 4.8m lengths.
The return dimension describes the shaped edge; it does not specify the finished step height. Step geometry, support and fixing arrangements still need to be designed for the project. Match the step edge to the chosen decking system and check how its profile meets the adjacent boards.
Measure by run length, not square metres
- Measure each exposed edge or riser separately.
- Record the height or profile needed at that location.
- Choose the compatible component and available length.
- Mark proposed joins and corner cuts on the sketch.
- Check which offcuts can actually be reused before rounding the order quantity.
A 12m² deck does not need a fixed number of trim pieces. Two decks of the same area can have different perimeters, step counts and exposed faces. Our decking quantity guide explains how to keep surface-area estimates and finishing quantities separate.
Include fixings and colour checks
Check the approved fixing method for each part, including any required pilot holes, clearances and support. Do not assume a decking-board clip is the correct fixing for fascia or trim. Add the relevant fixings to the order once the detail is confirmed.
Compare samples or product finishes together where possible. Existing Woodgrain listings note possible shade differences between lengths and batches. Ordering the project together can help with planning, but ask about the match if you intend to combine different lengths or ranges.
Prepare a complete finishing list
For each deck side, list the selected component, colour, length and quantity. Include the steps and any ends that will remain visible beside walls or planting. Review that list alongside the boards and framework, rather than treating it as a separate last-minute purchase.
Compare the board options in our decking buying guide. If you need help with a finishing detail, send a sketch or photograph to our team and check the installation guidance for your range.
Continue planning your deck
Compare grey decking profiles, check the board cost per square metre examples and review the Woodgrain installation planning guide.
