HD Deck Pro - Fitting Guide

Fitting Guide

It is recommended that HD Deck® Pro is installed as per this fitting guide, paying special attention to steps 1 & 6.

Click here to view a printable version of this fitting guide.

1) We recommend using treated 47x100mm timber joists and building in a gradual gradient of at least 1 in 100 (1%) that runs away from any adjoining buildings. Boards should run lengthways down this gradient to help water naturally disperse.

IMPORTANT: Spacing between the joists should be no greater than 300mm between each joist.

We recommend adding HD Protect™ Premium Joist Tape to the top and exposed cut ends of the timber to protect it from moisture that can cause rot and loosening of screws.

2)Place the first piece of decking on the timber frame with the decking running perpendicular to the joists. The first piece of deck may be secured with starter clips. Do not screw or nail through HD Deck® Pro, use one Universal Clip and screw on every joist.

If using the bullnose board to start the decking, please refer to the Installing the bullnose section.

When cutting, always saw the board face up with a new fine-toothed blade to prevent dragging that can cause furring and split ends after installation. If making a large number of cuts, the blade should be replaced regularly.

3) To secure the first board, use one Universal Clip and screw on every joist. Take a screw, place in the hole located in the Universal Clip and screw into the wooden joist. Do not tighten at this stage. Make sure the boards do not overhang the joist at the edge by more than 25mm and a 10mm expansion gap should be left between the wall or other fixed objects surrounding the deck.

4) Take the next piece of deck and securely push into the Universal Clips. Now nip the screw to secure the Universal Clip against the board. Do not over tighten. Now repeat steps 3 and 4 to cover the deck, using one Universal Clip and screw on every joist. For a more natural finish, we recommend alternating the direction of the wood grain when installing the boards. If using the bullnose board, use this as your starting point.

5) IMPORTANT: Do not allow deck boards to meet at the ends. When installing in temperatures of: - 15˚C or above allow a 5mm gap for expansion. - Between 10-15˚C allow a 6mm gap for expansion. - Between 5-10˚C allow a 7mm gap for expansion. Do not install in temperatures below 5˚C. Joins should only occur over double joists with a Universal Clip securing each end.

Slim Clip Alternative
The Slim Clip can be used to close up the gaps between boards if preferred. Simply follow Steps 1-5, using the Slim Clip in place of the Universal Clip. IMPORTANT: the expansion gaps at the ends where the deck boards meet, must be maintained as explained in Step 5.

6) To fit the final boards, first measure the width of the final two boards to find out where the outer edge of the final board will lie. Using these marks, fit starter clips and slot the final board into place. Now insert the penultimate board, slide down the required number of Universal Clips and screw these into place.

7) If using fascia, drill pilot holes with counterbore through the fascia at 200-300mm intervals. According to ambient temperature allow a 5-7mm gap between end of deck board and the fascia. Screw fascia to the joist. Always screw fascia to the joist at a 90° degree angle.

Installing the Bullnose

It is recommended that HD Deck® Pro bullnose deck board is installed as per this fitting guide, paying special attention to the following steps. NOTE: The HD Deck® Pro bullnose deck board is 150mm wide

For an overhang finish

1) Place two starter clips as shown above, and secure in place with the respective screws. Ensure that the spacing measurements are correct.

2) Insert the HD Deck® Pro bullnose deck board over the clips and push it forward. Secure in place with Universal Clips as required.

For a flush finish

Borders
After installing the HD Deck® Pro bullnose deck board, as per the above instructions, use the Universal Clip to secure to the rest of the deck. See Using the New Universal Clip overleaf.

Steps
Install the HD Deck® Pro bullnose deck board as per the above instructions, leaving a gap behind the board to enable you to fit the fascia.

It is recommended that HD Deck® Pro is installed using our Universal Clip. This clip is designed to enable you to also fit the HD Deck® Pro bullnose deck board and create designs where the boards are fitted at right angles to each other

1)Insert the Universal Clip as shown in the diagram with the front of the clip positioned in the groove of the secured bullnose deck board.

2) Screw the Universal Clip to the joist, then securely push the next deck board in place.

3) Repeat this process for the remaining deck boards, making sure the fronts of all the Universal Clips are firmly in the groove of the bullnose deck board.

Please note : Images and drawings are for illustrative purposes only. HD Deck® Pro may be laid in a variety of patterns, we recommend that you draw out how you would like your deck to appear, making notes of joins and joists before starting the installation. For elevated decks greater than 600mm (0.6m) in height we recommend using a professional installer. When cutting, always saw the board face up with a new fine-toothed blade to prevent dragging that can cause furring and split ends after installation. If making a large number of cuts, the blade should be replaced regularly. Don’t forget to register your warranty, within 45 days of purchase, at www.composite-prime.com/register-warranty.