How to Install Edge Boards for Composite Decking

Overview

Edge boards can be used with the hidden fastener system to create a perfectly flush finish on deck edges and steps. There are two methods for installing the board, parallel and perpendicular to the decking.

Ensure to keep a 6mm expansion gap between edge board butt joints (minimum 0.2% of the boards length).
When using edge boards, use decking boards to complete the vertical deck skirting. Edge boards are not compatible with Hyperion®
fascia boards.

Note: This finish is for use with Explorer composite decking, if you're using Frontier boards, opt for

Bullnose Edging.

Parallel Edge Board Installation

Step 1

Mitre the ends

Where fixing the edge boards around a corner, mitre the ends at 45° angles.

Step 2

Secure with fasteners

Place the edge board over the edge of the joist and secure it in place with hidden fasteners at 300mm intervals. Your chosen finish will affect the type of fasteners you should use to install the board:

If you are using a deck board for your fascia, use a 6mm or 3mm hidden fastener to secure the bottom of the edge board.

OR

If you are not planning to add fascia, you can use a starter fastener along the bottom edge.

Secure the top side of the edge board with 6mm hidden fasteners.

Lightly secure down to the joist, you will fully tighten once the next board is in place.

Step 3

Place the first deck board

Once secured in place, slide the first deck board into the hidden fasteners.

Step 4

Tighten the fastener

Fully secure the hidden fastener to the joist.

Perpendicular Edge Board Installation

Step 1

Mitre the ends

Where fixing the edge boards around a corner, mitre the ends at 45° angles.

Step 2

Install starter fasteners

Install starter fasteners on the top side of the outer joist (the vertical clip edge should be 35mm from the outer joist edge). Starter fasteners should be installed every 300mm along the length of the joist.