To fix Fascia Skirting or L Profile trim to your composite decking by Tough Decking, you can follow these steps.

1. Start by cutting the fascia skirting or L profile trim to the correct length and width to fit around the perimeter of your deck.
2. Use a chalk line or other straight edge to mark a line where the top of the fascia or trim will sit.
3. Apply clear adhesive/sealant to the back of the fascia or trim, spreading it evenly over the surface.
4. Align the fascia or trim with the chalk line and press it firmly into place against the edge of the decking.
5. Use stainless steel screws to secure the fascia or trim to the decking. Make sure to pre-drill holes in the fascia or trim to prevent splitting, and use screws that are long enough to penetrate both the fascia and the underlying framing.
6. Repeat the process for each section of fascia or trim until the entire perimeter of the deck is covered.
7. Once all the fascia or trim is in place, use a saw or router to trim any excess material from the edges.