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Trex deck cost guide

Introduction to Trex decking

Trex deck is a type of composite decking, first introduced in the 1990s. It’s environmentally friendly – made from 95% recycled materials – and has a high-performance coating making it a very low maintenance option.

They are the largest manufacturer of timber-alternative decking, that combines form and function for a visually stunning feature that lasts. Whilst building a Trex deck is not cheap, especially compared to wood, the cost to install a Trex deck is in-line with other composite decking.

In this article we’ve calculated the average prices to install Trex deck in any garden – members of the Checkatrade team completed thorough online research.

You may also find our 2020 garden decking cost guide useful.

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Average cost of Trex deck Installation

If you’re looking to build an ultra-low maintenance outdoor living space, then Trex is the perfect solution that can also add value to a home. In the table to the right we have shown average costs.

Trex deck costsUnitCost + VAT
Solid core composite decking area 15 SQ. M (single level)Per project (average)£1600
Trex decking materials - Basics3m X 5m (15 SQ. M)£898
Trex decking materials - Naturals3m X 5m (15 SQ. M)£1,085
Trex decking materials - Transcend3m X 5m (15 SQ. M)£1,294
InstallationPer day£200
Stair rail kit and postPer post£200

So, a single level solid core composite decking area of that’s 15 square metres would cost around £1,500 for the materials and £200 for the installation.

Factors affecting the cost of Trex decking

Whilst Trex decking is more expensive than some other brands, the boards only contribute a small amount to the overall cost. There are many factors that play a role in the Trex deck cost, including:

Labour: Depending on the scope of the project, if any groundworks are required or if you want any raised structures, the labour cost can be the largest or smallest part of the project cost. If you install the Trex deck yourself or hire a deck builder when their demand is lower (typically in the winter months) this can help bring the cost down significantly.

Trex board type: Trex comes in different versions, colours and styles designed to suit a range of budgets, including Trex Select, Enhance and Transcend. Limited edition colours tend to cost more. For those on a budget we recommend the Trex Select range.

Add-ons: A Trex deck is more than just the flooring. Do you want railings, stairs, roofing, lights, benches or other features? These all add on to the cost.

Size: The larger the area, or the more unusual the shape, the greater the cost will be. Curved designs cost more to build than simpler, straight sections. To calculate the size of the space, measure the length and the width in meters.

Depending on your answers to the questions above you can pay around £100 per square meter for the boards with any add-ons priced separately.

Trex decking panels

Is Trex decking worth the cost?

With high durability and an expected life of over 25-years, Trex pays for itself over time. Here’s how it compares to other types of decking:

Timber – Unlike traditional timber decking, Trex doesn’t rot or go mouldy. Whilst wooden boards can often vary in quality, Trex boards are always consistently high quality, helping to reduce waste and speed up the installation process.

Stone – Stone flooring can be prone to cracking, erosion and damage over time. It’s also slippery when wet. Trex decking does away with all of these problems.

PVC – Whilst PVC is low maintenance, it’s less environmentally friendly and prone to fading and staining over time. Trek is equally low maintenance, without the other drawbacks.

Other composite decking products do exist including Dura and TimberTech.

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What does installation of Trex decking entail?

Trex deck installation in progressIn most cases you do not need to apply for planning permission for decking. You will need to apply when:

  • The decking will stand more than 30cm above the ground.
  • More than 50% of the garden space will be covered by decking and other outdoor buildings and extensions.
  • The privacy of neighbours or their property value will be negatively affected.

The price to install Trex decking is in the region of £200 per day with most projects only taking a day or two.  The good news is that the cost to install a Trex deck is roughly the same as that of wooden decking. There are no special tools required and any decking installer will be well suited to conduct the installation.

We always recommend following the manufacturer’s instructions for installation if doing it yourself. Trex have a fantastic resource guide  full of installation instructions. We also have a handy guide on what you need to know when installing decking on grass.

One key thing to consider is thermal expansion. Depending on the temperature the decking will move, so sufficient spacing should be left between the individual boards and adjacent walls to allow for this.

Trex deck maintenance tips

Quality trex deckingBy far the biggest benefit of Trex decking is the convenience. Over the life of the product you will pay far less for repairs and maintenance than timber or stone options.

This is thanks to a high-performance shell that protects the core composite board. Also known as ‘capped composite decking’, an extra coating is added to protect against the elements, such as rain and termites. The material won’t rot, warp or splinter and there’s no need to stain or paint it. As a result, it’s virtually maintenance-free.

For further peace of mind, Trex decking has a 25-year limited residential warranty and 25-year fade and stain warranty, which shows just how long the product is designed to last.

Need a Trex decking quote?

To find a local, reputable, tradesperson in your area and get a quote for Trex installation costs, use our free search feature.

Key takeaways for Trex decking

  • Trex decking is low maintenance and long lasting but it can cost more than other options.
  • Labour can add a lot to the cost to install a Trex deck, especially if groundworks are required.
  • Add-ons such as stairs and benches can make for an amazing space if your budget can stretch to them.
  • Be sure to check if you need planning permission before seeking installation costs.
  • Trex’s two 25 years warranties provide long term peace of mind.

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