Composite Decking Installation

Get the best out of your composite decking with the right installation

Composite decking is a fantastic low maintenance eco friendly product that will look great and last for years with very little looking after… So long as you take the time to make sure it is installed correctly.

It is a mixture of recycled hdpe plastic, eucalyptus timber and additives. The clue here is timber. A lot of people think that composites are plastic and treat it as such, when in fact it has a lot of the characteristics of timber, so it expands, reacts to water and its environment.

Before installing our composite decking, take the time to read our detailed installation manual. It will make putting down the decking straightforward and potentially save you money in avoiding damaged boards.

This article is by no means a quick guide to composite decking installation but an overview of the main things to do to make sure the decking is installed correctly…

  1. Drainage

    Our decking requires a fall off of 1 in 80 to help water run off the boards. This means that for every 800mm in length, the decking needs to be 10mm lower at one end than the other. So for instance, a decking that is 2400mm in length needs to drop 30mm. You need to ensure the boards do not sit in water as they will absorb the moisture which will cause swelling and cracking as the boards dry out.

  1. Support

    Our normal decking which is 22mm thick needs to be laid on joists that have a centre to centre distance of 300mm. Our newer 25mm thick boards can have a slightly wider span of 400mm centre to centre. This ensures that the boards are well supported and reduces the amount of movement of the boards.

  1. Expansion

    As mentioned earlier, an important characteristic of composite is that it expands and contracts. Tests have shown that it expands between 0.3% – 0.5% over its entire length at its extreme so our 22mm boards will expand about 11mm at the most. With the heat and moisture in this country, so long as you leave a minimum of 5mm between the boards at the small butt ends, you should be fine. The concealed clips will give the required gap between the boards across their length.

IF YOU NEED ANY FURTHER INFORMATION ON COMPOSITE DECKING INSTALLATION, GIVE US A CALL. ONE OF OUR TRAINED STAFF WILL BE ABLE TO ANSWER YOUR QUESTIONS.

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