1 January 2020

Frequently Asked Questions

How much composite decking do I need?

We suggest calculating the area of your decking project in square metres and adding 5% for wastage. When you go to order your deck boards, you will be given the option of ordering by the number of boards or by deck area – remember to tick the ‘extra 5%’ tick-box.

How long does composite decking last?

Our composite decking has a life expectancy of between 20 and 30 years. For comparison, traditional timber decking has a lifespan of around 5 years. All our composite decking products come with a 10-year limited warranty.

What supports composite decking?

Underneath every beautiful composite deck is a rock-solid, reliable substructure. Supporting the weight of the deck above while allowing drainage and airflow, the subframe is made up of joists, battens and pedestals to hold the deck in position. Along with adjustable pedestals suitable for a range of deck heights, we stock lightweight, corrosion-resistant aluminium joists and composite battens to build a substructure that lasts just as long as your composite deck.

Composite decking – which side up?

The choice really is yours. All of our composite decking boards are supplied with a ridged pattern on one side and a wood grain effect on the other. This reversible design gives you the option of 2 slightly different looks for your new deck, or why not go for option 3 – some customers use the wood grain for the main deck and the ridged pattern for steps and edges.

How long and wide are composite decking boards?

Available in a choice of standard 4-metre lengths and smaller 2.4-metre lengths, our composite decking boards measure 145mm wide and 21mm deep.

How do you cut composite decking boards?

You can cut composite decking boards in exactly the same way that you would cut timber decking boards, using the same standard tools. We would recommend using a circular saw or mitre saw with a sharp medium toothed blade.

What gap should be left between composite decking boards?

It is essential to leave gaps between your composite decking boards to allow for both adequate drainage and any expansion in hot weather. The size of the gaps must be even and consistent to give a pristine finish, but the choice of gap size is yours. Our fastener system is designed to act as hidden spacers to effortlessly create equal gaps between boards. The 6mm fasteners are a reliable and affordable choice, while the 3mm fasteners more closely align the deck boards for an immaculate, premium finish.

Additionally, butt joints – where one decking board is touching another – and ends of decks (against walls etc.) should have gaps of between 8mm and 12mm. It’s important to take the weather into account – on the hottest days the boards will be fully expanded, and need little to no gaps. On the coldest days the boards will be contracted and need the larger size gap installed.

How do you fasten composite decking?

With no visible screws or other fixings, it is sometimes hard to see how composite decking has been secured into place. That’s because the man-made boards are designed to be held in position with a hidden fastener system, which explains the flawless, fixing-free finish. Available in a choice of 3mm or 6mm, the fasteners are placed between the deck boards and anchored to the joist beneath with a screw. The fasteners also act as spacers, providing even and uniform gaps across the whole deck, and are secured into place with standard tools.

How should I finish off the ends of composite decking?

For a professional finish, we suggest concealing open deck board edges with our easy to install End Caps. Pushing into place with no tools or fixings necessary, the optional End Caps are a fast, effective and simple way to conceal exposed areas, and are available in colours to perfectly match our decking boards. There are various methods of achieving this flawless finish – we also recommend the use of Edge Trims, Bullnose Edges and Skirting Boards. Our full range of decking products is available here: https://www.thecompositedecking.co.uk/products/

How should I care for my composite decking?

Composite decking requires minimal maintenance over its lifetime. To keep your decking looking as good as new for longer, we recommend sweeping away debris from the surface of the boards and clearing the gaps in between the boards as needed, to keep the air circulating and to prevent algae and mould growth. Once or twice a year, follow this up by washing down your deck. Start by cleaning with a soft scrubbing brush and warm soapy water, and rinse with a hose to prevent soap and water stains. If anything gets spilt on the deck – particularly anything greasy – wipe it up immediately to prevent staining.

How do you remove mould from composite decking?

We recommend removing mould from the surface of your deck using soapy water and a soft-bristled brush. Scrub in the direction of the board and rinse down with a hose when finished. If necessary, a bleach-free composite decking cleaner can also be used. To prevent mould returning, keeping your deck free from debris and carefully clear the gaps between the boards to maintain adequate drainage. In extreme cases a copper-sulphate solution can be used to prevent mould build-up.

Is composite decking slippery when wet?

Composite decking is specifically designed to be non-slip and is much less slippery than timber decking. While torrential rain or an accumulation of snow and ice will make any surface slippery, anti-slip composite decking does not incur the same degree of mould and algae as timber, which is a primary cause of slippery outdoor surfaces. To keep your composite deck in perfect non-slip condition, sweep away any surface debris and wash down as needed.

How do you clean composite decking?

Composite decking is ultra-low maintenance and requires minimal cleaning. To keep your decking looking pristine, we recommend sweeping away debris as needed, and washing your deck with soapy water and a scrubbing brush before rinsing thoroughly with a hose twice a year, preferably in spring and autumn.

How can I remove stains and grease from composite decking?

In the case of spills on the surface of your decking, immediately wipe up the spillage to prevent staining. Cleaning the deck with soapy water and a scrubbing brush can help to remove grease, or alternatively use a bleach-free composite decking cleaner, closely following the product instructions.

How do you paint composite decking?

Composite deck boards are supplied as a finished product and are not designed to be painted. Instead, the decking is available in a range of attractive colours including traditional wood tones and modern greys. Our free sample pack includes a board segment in every colour option so you can see them up close.

Can I see the products in person?

Our warehouse is situated in Wigan, and we are happy for you to visit – just call or email us for an on-the-day collection. Alternatively, we offer free sample packs which contain a small section of decking board in each of the available colours, allowing you to see and feel the quality of our decking for yourself. Order a free sample pack here: https://www.thecompositedecking.co.uk/sample-pack/free-composite-decking-sample-pack/

How long does delivery take?

Order before 10 am on Friday and we will guarantee delivery by the end of the following week. We will do our best to ensure that orders received after that time reach you the same week if at all possible. Free sample packs and orders containing smaller items are usually received within a couple of days. Please see our delivery page here: https://www.thecompositedecking.co.uk/delivery/

Can I collect my order instead?

Yes, you are very welcome to collect your order from our warehouse in Wigan by arrangement. You can find us at:

Unit 1 Wetheral Close

Hindley Industrial Estate

Hindley Green

Wigan WN2 4HS

What happens if I need to return unused boards?

We accept returns of new and unused boards as long as all the original parts are included and there is no damage to the boards. Please see our Refunds and Returns policy here: https://www.thecompositedecking.co.uk/refunds-returns-policy/ for full details.

Do your products come with a warranty?

Yes, we offer a 10-year limited warranty on all our products. Contact us for more information.


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