Co-Extrusion L Trim 3.66m - Anthracite

The 3.66m Co-Extrusion L Trim in Anthracite is the ideal finishing piece for modern composite decking projects. It is designed to sit over exposed board edges and corners, giving your deck a clean, architectural border while shielding vulnerable areas from impact and weather.

Made using advanced co-extrusion technology, the trim features a composite core with a protective outer cap. This combination provides excellent durability against moisture, staining and UV rays, making it well suited to the demands of UK gardens and terraces. The deep Anthracite tone brings a contemporary look that works particularly well with grey and charcoal deck boards.

With a 50mm x 50mm profile and a generous 3.66m length, this trim is versatile enough for perimeter edges, raised platforms and step details. It can be cut to size with standard tools and is straightforward to install for both professionals and competent DIYers. Once fitted, it requires very little upkeep beyond the occasional clean.

Key features:

- 3.66m Co-Extrusion L Trim in Anthracite
- 50mm x 50mm profile to finish and protect exposed edges
- Co-extruded composite for long-lasting performance
- Highly resistant to moisture, fading and everyday wear
- Contemporary Anthracite colour to complement Co-Extrusion Duo decking
- Suitable for residential gardens and commercial outdoor areas

If you want your composite decking to have a crisp, modern outline that stands up to the elements, this Anthracite L Trim is an excellent choice. It elevates the overall look of the installation while providing a practical, protective finish.

Check that all deck boards are fully fixed and trimmed back so the outer edges are straight and true. Clean the area where the L Trim will be installed, removing any dust or loose debris.

Measure each section of edge or step and cut the trim to suit using a fine-toothed saw designed for composite materials. Offer the pieces up to the deck to confirm they sit snugly against the boards and that joints fall in suitable positions, such as corners.

To fix the trim, either pre-drill and secure with exterior-grade screws or use a high-quality outdoor adhesive. When using screws, drill pilot holes at regular centres, then fix into the subframe or fascia to hold the trim firmly in place. Keep screw spacing consistent for the best appearance.

On external corners or step returns, cut accurate mitres so the trims meet cleanly without gaps. Once all anthracite trims are installed, wipe down the faces to remove any dust or marks. You’ll be left with a strong, contemporary frame that enhances the look and durability of your composite decking.