Article Summary:

Are you wondering how much to budget for when planning your Composite Decking project?

Starting with the size of your garden space and how much of it you want to turn into decking, we will look at the price per square metre and what type of Decking Boards you might want to go for in comparison to timber decking boards.

Following this, we break down the price of install, how many days it will take, and what other fixings, finishings, and maintenance tools you'll need to keep your Composite Decking looking great for many years to come.

Don't forget to check out our Composite Decking Calculator which will guide you through the total cost as well as how many materials are required for your project.

Article Contents:

The Cost to Install Composite Decking

When planning out your area and working out the price of composite decking, start by working out how many square metres of outside space you want to convert to decking.

Below is a list of the three main areas for working out the cost of installing Composite Decking, which we will break down further:

  • Materials - factor in the cost of the Composite Boards or Timber Decking Boards and include the cost of additional items such as Corner Trims, Fixings, Skirting, Weed Mats and supporting Joists that are also required. Also include Weed Mats and Pins if installing your deck on top of soil. Expect to pay £450-£1,000 for these additional items. See the below table for pricing range of Decking.
  • Labour - if you are going the DIY route, this will reduce the cost of the installation drastically, but could increase the overall time to complete. Companies can be pricey, however will speed up the process. On average, Composite Deck can be installed in 1-3 days and can cost £400-£600.
  • Maintenance - Composite Decking is low-maintenance and so upkeep costs are kept low and come with a ten-year guarantee. Keeping your deck washed with lukewarm soapy water once a year is generally all that is needed.


How much is composite decking versus wood

Coming in cheaper than Composite Decking on the initial outlay, Timber is a lower-cost material. This small initial outlay is offset by the more expensive maintenance costs in the long run, making Composite Decking a better investment for the future.

For Timber Boards, include in your budget £2-£4 per metre, with much more intensive upkeep required throughout its lifespan, including painting and staining. This will inevitably increase the price and time spent maintaining these types of Boards in the long run.

Composite Decking Boards are generally priced higher at £6-£10 per metre, which varies depending on the product's finish and whether they are Solid or Hollow Composite, Woodgrain or Original. A low-maintenance Decking material means that the cost over its life span will be considerably less.

Wood Deck VS Composite Deck Costs Table

Composite Decking Boards have a longer life span than Timber Decking and are lower maintenance in comparison. Listed in the table below are maintenance costs after 10 years, and what type of upkeep is required for the type of Decking Composite.

Composite Decking Boards generally come with a 10-year warranty with the latest generation of Decking Boards. Be wary of manufacturers offering more than a 10-year warranty for quality composite decking without being able to prove the results of the long lifespan.

How much does installing composite decking cost?

When working out your deck cost, you'll need to consider the size of your garden area and which additional products are best for your Composite Decking.

If you choose a local company, the average cost of a Composite Deck installation can range from £400-£600 depending on the size of the area.


You'll need supporting Joists to provide an adequate base for the Boards, with prices starting at £2.5 per metre.

Additional products such as finishing trims and fixings will increase the cost of your deck. From Weed Mats and End Caps (for Hollow Decking Composite) to Corner Trims and Skirting Trims priced at £3-£5 per metre.


Composite decking prices

High-quality Composite Decking is the pricier option, but the wood-plastic materials used in the manufacture of these Boards provide long-lasting properties and lower upkeep costs overall. Composite Decking Board prices vary depending on their type, with the average cost of Solid Core Composite Decking per 15 square metres at £900-£1,400.

Hollow Core Composite Deck prices come in cheaper due to less material used within each Board, ranging from £700-£1,000, however providing less support for heavier objects such as jacuzzis, BBQ, and heavy ornaments.

Tips to save composite decking costs

Here are three ways to bring the installingcostprice down for your Composite Decking project:

  • DIY route - Installing Composite Decking yourself is the best way to reduce the overall costs. Composite Decking is easy to install with a T-Clip System and Screw, so if you have the time and are physically able, this could be an option.
  • Hiring a contractor - If you plan on hiring a contractor, aim for the off-peak season (in Spring and Winter) when prices and discounts could be considered.
  • Simplify your design - avoiding complex decking designs, such as curves and intricate steps, will help keep wastage to a minimum and will ensure you get the most out of the materials that are supplied.

Supply costs

Supply costs of materials for your Composite deck have been approximated for a small decking area of 15 sq metres in the table below.

Average costs have been worked out based on four-metre length boards for each type of Composite Board, including Bullnose Boards used to create a 'frame'.


Additional costs

Composite Decking comes with additional costs that need to be taking into consideration, from Supporting Joists and Weed Mats, to Skirting Trims and Fixings. Below we look at what you can expect to pay for these extras and the average cost per 15 square metres of decking.

Labour costs and time frames

If you opt for a professional company to install your decking, expect to pay £200 per day. This can vary given the complexity of the decking area, but smaller deck areas such as 15 sq metres can usually be completed in a single day.

For larger, more complex jobs, time frames can extend to 2-3 days, increasing labour costs to between £400-£600. Costs may be more if complications arise.

Consider obtaining quotes from at least three companies who are able to assess your garden area before starting the work. Local decking specialists or landscape gardeners are good places to begin.

Calculate your decking cost

Ready to begin planning your project? Use our Decking Calculator to explore which products to include in your project. The Calculator will help guide you through costs and to work out the price of fixings and any additional products that will be required for your area.

To use our Decking Calculator, follow the on-screen prompts to define the shape and size of the area you are looking to cover and gain a better idea of the final price.

Get in touch with us for further assistance and information by contacting our sales team either via email at [email protected], or by calling 01837 659901.