Sub Frame Installation
The sub frame for your DesignBoard deck can be constructed from timber or composite. We’ve opted to use a composite sub frame for this installation guide. Composite is an environmentally friendly material that’s made from recycled plastic and unlike timber does not rot or degrade. Please note that, like timber, composite can still warp.
When using a composite sub frame it’s more difficult to countersink the screw heads into the sub frame and you will experience protruding screw heads.
If you are planning for any of the front or sides of the sub frame to be on display or, are planning to fit a fascia to the front or side of the sub frame you will need to counter sink any screw heads into the sub frame. Countersink drill bits are available from any good DIY store.
In this installation guide we have used a countersink with a built in drill fitting. Using this type of fitting allows you to drill a pilot hole at the same time as drilling the countersink.
Galvanised Steel Edging Strip with fascia
DesignBoard can be installed using an invisible clipping fixing system. Because the invisible clips are designed to sit between two boards we need to use an edging strip to hold the outer/exposed edge of the first piece of decking in place.
If you are planning to fix a DesignBoard upright fascia to the front of the sub frame, the edging strip will need to overhang the edge of the sub frame by the width of the fascia board (10mm) + an additional amount for tolerance and/ or creation of a small overhang if desired.
Screw the edging strip to the sub frame. Use a countersink to ensure the screw head sits flush with the top surface of the edging strip. If the screw head is not counter-sunk sufficiently the first decking board will not slide neatly into the edging strip.
Galvanised Edging Strip without fascia
If you’re not planning to install a fascia and/or the edge of the sub frame is against a wall, the edging strip should be fitted flush to the edge of the sub frame. Use a countersink to ensure the screw head sits flush with the top surface of the edging strip.
If the screw head is not countersunk sufficiently the first decking board will not slide neatly into the edging strip.
Fit the first piece of DesignBoard
Select the first piece of DesignBoard and slide into the galvanised steel edging strip. The textured face is the surface finish and should be facing upright.
Clip DesignBoard into place DesignBoard is designed to be fitted using an invisible clipping system. The stainless steel clips are designed to give an automatic 4mm space between the boards. Slide your first clip into position on the centre of the joist.
The wider side of the clip should face outwards so that the clip screw hole is fully exposed. Apply pressure with your hand or knee to ensure the DesignBoard is firmly pushed up tight against the edging strip, ensuring the DesignBoard cannot move between the clip and the edging strip.
Screw the clip into position.
Clip DesignBoard into place
Clip the whole length of the first piece of DesignBoard into position.
Fit the second piece of DesignBoard
Slide the second piece firmly into the run of clips and screw the second run of clips into position.
Joining two cuts together
Double joists should be used where two boards meet together and one clip should be used at the end of each board. Where cut boards meet there should be a gap of 4mm to allow for any expansion. Use plastic spacers to ensure the gaps are even.
Clip the rest of the DesignBoard into place
Follow the steps and fit the whole of the DesignBoard deck.
Installing a front fascia
Use a matching DesignBoard fascia to dress the front of the deck. Screw the fascia to the sub frame below the galvanised steel edging strip using counter-sunk stainless steel screws.
Installing a side fascia
The side of DesignBoard features ridges. These ridges allow air to flow through the decking & sub frame and are integral to the long term durability of the product. If the side of the deck is on display then these will look unsightly and will need to be covered with a fascia.
Screw the fascia to the side of the sub frame using counter-sunk stainless steel screws.