What Is Composite Decking? A Complete Guide 

If you’ve been researching decking options for your garden, you’ve probably come across the term composite decking and wondered exactly what it is and whether it’s worth the extra cost over regular timber. This guide explains what composite decking is actually made of, how it compares to softwood and hardwood, real pricing based on projects we’ve completed, and a case study so you can see it in a real garden setting.

At JPD Landscaping & Building Services, we’ve been installing decking across South East London for over 15 years, working with softwood, hardwood, and composite materials depending on what each garden and customer needs. This guide is based on that hands on experience, not just general product information.

What Is Composite Decking?

Composite decking is a manufactured decking material made from a mix of wood fibres and recycled plastic, bonded together to create boards that look like timber but behave very differently. Instead of needing yearly staining or sealing, composite boards are designed to resist moisture, fading, and rot with very little ongoing maintenance.

In terms of cost, composite decking typically runs between £250 and £300 or more per square metre, including materials and labour. That’s higher than both softwood (£120 to £160 per square metre) and hardwood (£150 to £250 per square metre), but the low maintenance requirement often makes it a smart long term choice, especially for busy households or gardens that get heavy use.

What Is Composite Decking Made Of?

Composite decking boards are typically made by combining wood fibres or sawdust with recycled plastic, then compressing the mixture under heat to form solid boards. The exact ratio of wood to plastic varies between manufacturers, but the goal is always the same: keep the natural look of timber while removing most of the downsides that come with real wood.

Most composite boards also come with a protective outer layer, sometimes called a capping layer, which adds extra resistance to staining, fading, and moisture. This is one of the main reasons composite decking holds its colour and finish so much better than timber over time. Boards without this capping layer, sometimes marketed as budget or first generation composite, tend to be more prone to fading and surface wear, so it’s worth checking whether a quote includes capped or uncapped boards before comparing prices.

The core of the board also affects performance. Wood plastic composite blends real wood fibre with recycled plastic and tends to have the most natural appearance and feel underfoot. PVC based composite boards use little or no wood content, which makes them extremely resistant to moisture and rot, though the finish can look slightly more synthetic depending on the brand.

Types of Composite Decking

Not all composite decking is built the same way, and understanding the main types helps when comparing quotes that might otherwise look confusing.

• Solid core composite boards are dense, heavier, and generally more durable, but they cost more and are harder to cut and install. They tend to be the choice for high traffic areas or commercial style installations.
• Hollow core composite boards are lighter and more affordable, with a chambered structure inside the board. They’re a popular choice for residential gardens since they still perform well while keeping costs more reasonable.
• Capped composite boards have that protective outer layer mentioned earlier, giving the best resistance to fading, staining, and moisture damage.
• Uncapped composite boards are cheaper but more likely to show wear, staining, and colour fade over several years of UK weather.

For most residential projects we complete in South East London, capped hollow core boards offer the best balance of price, appearance, and long term performance.

Why Do Customers Choose Composite Decking?

Based on the composite decking projects we’ve completed, there are a few consistent reasons customers choose it over softwood or hardwood.

• Low maintenance. Composite decking doesn’t need staining, sealing, or sanding. A simple clean with soapy water a couple of times a year is usually enough to keep it looking good.
• Better weather and moisture resistance. Unlike softwood, composite doesn’t swell, warp, or rot when exposed to constant rain, which makes it particularly well suited to UK weather.
• Longer lifespan with a consistent look. Composite boards tend to hold their colour and shape for many years, without the greying or splitting that untreated or under maintained timber can develop.
• Family and pet friendly surface. Composite boards resist splinters and are less likely to trap dirt or moisture in grooves, which makes cleaning up after muddy paws or spilled drinks much simpler than with timber.

In our experience, all of these reasons tend to come up together rather than one standing out on its own. Customers usually want a deck that looks good with minimal ongoing effort, and composite delivers that consistently.

Composite Decking Cost Breakdown

Composite decking costs more upfront than either softwood or hardwood, typically £250 to £300 per square metre or more, including installation. While this is a genuine investment, it’s worth viewing in the context of the full lifespan of the decking rather than just the initial price tag.

For a large garden in the 20 to 35 square metre range, which is the size we most commonly work with, that works out to roughly £5,000 to £10,500 for a complete composite decking installation.

While the higher upfront cost is worth being upfront about, in our experience it’s a relatively minor factor for most customers once they understand what they’re getting. The near zero maintenance requirement and long lifespan tend to outweigh the initial price difference for anyone planning to stay in their home for several years.

What Affects Composite Decking Cost the Most?

Just like timber decking, the per square metre price is only part of the picture. A few factors consistently move the final bill up or down on real projects.

• Board grade and brand. Premium capped boards from established manufacturers cost more than budget or uncapped alternatives, but they generally last longer and resist fading better.
• Board profile and finish. Grooved, ridged, or textured finishes designed for extra grip can add a small premium compared with plain flat boards.
• Substructure material. A composite frame or aluminium substructure costs more than a timber frame but improves the overall lifespan of the whole deck, since the frame won’t rot even if the boards outlast it.
• Fixings and edging. Hidden fixing systems and matching composite edge trims give a cleaner finish but add to the material cost compared with visible screw fixings.
• Ground condition and access. As with any decking project, sloped gardens, poor drainage, or restricted access for material delivery will increase both time and cost.

Composite vs Softwood vs Hardwood: Full Comparison

There’s no universally best option here. It really comes down to how much upfront budget you have, and how much time you’re willing to spend on maintenance over the years you own the deck. If you’re weighing this up against other surfaces entirely, our garden decking installation page covers the full range of materials we work with, and if you’re planning the wider garden alongside the decking, our guide on how much it costs to landscape a garden is a useful companion read for budgeting the whole project.

How Long Does Composite Decking Installation Take?

For a typical residential composite decking project, installation takes three to five days from start to finish. This includes preparing the ground, laying the substructure, fitting the composite boards, and finishing details like edging or trims.

As with timber decking, this timeline can extend if your garden needs significant levelling, or if you’re adding features like steps, balustrades, or built in lighting. Composite boards can also take slightly longer to cut and fit precisely around fixtures compared with softwood, since accuracy matters more for a clean, consistent finish with this material.

Composite Decking Colours and Finishes

One area where composite decking has improved significantly over the last decade is colour range and realism. Most manufacturers now offer a spread of tones from light driftwood grey through to warm cedar and deep charcoal brown, allowing the finish to be matched to brickwork, fencing, or existing garden furniture.

Multi tonal boards, which blend two or three shades within each plank, tend to look the most natural and hide dirt or light surface marks better than a single flat colour. Darker boards give a bold, modern look but can retain more heat in direct summer sun, so lighter or multi tonal shades are often a more practical choice for south facing gardens.

How to Maintain Composite Decking

One of the biggest selling points of composite decking is how little ongoing care it needs compared with timber, but a small amount of regular maintenance still keeps it performing at its best.

• Sweep or brush the surface regularly to stop leaves, dirt, or moss building up between boards.
• Wash with warm soapy water and a soft brush every few months, more often in autumn when leaf fall is heaviest.
• Avoid pressure washing on the highest setting, since this can damage the capping layer on some board types.
• Check and clear drainage gaps between boards periodically, particularly after heavy rain or in shaded, damp areas of the garden.
• Address any algae or organic growth quickly with a decking safe cleaner, since damp, shaded spots are the most likely place for this to develop, even on composite material.

This level of upkeep is minor compared with the yearly staining or sealing that softwood decking requires, which is a large part of why composite has become such a popular choice for busy households.

Real Project Example: Large Composite Deck in SE London

One of our composite decking projects involved a 28 square metre garden in South East London, owned by a family who wanted a deck that could handle daily use from young children and pets without needing constant upkeep.

Project snapshot:

The family had previously had softwood decking that needed constant re staining and had started to warp in a few spots. Switching to composite gave them a surface that stands up to daily use, spilled drinks, and muddy paws without the yearly maintenance routine they’d grown tired of. We used capped, hollow core boards in a multi tonal grey finish to match the existing fencing and garden furniture, along with a hidden fixing system for a clean, screw free surface. Four days after starting, the deck was fully installed and ready to use, with no ongoing treatment needed beyond the occasional wash down.

Since installation, the family has reported that the deck has handled two full summers of daily use, including a paddling pool and regular outdoor meals, without any fading, staining, or warping, which is exactly the kind of long term performance composite decking is designed to deliver.

Common Myths About Composite Decking

There are a few misconceptions worth clearing up, based on questions we hear regularly from customers.

• Composite decking looks fake. Modern composite boards have come a long way and closely mimic the grain and texture of real timber. Many customers are surprised at how natural it looks once installed.
• It gets too hot in summer. While darker composite boards can warm up in direct sun, lighter shades perform similarly to timber and don’t pose a major issue for most UK gardens.
• It’s not eco friendly because it contains plastic. Most composite decking actually uses recycled plastic and reclaimed wood fibres, making it a reasonably sustainable choice compared with some virgin timber products.
• It’s slippery in the rain. Most modern composite boards include a textured, grooved surface specifically designed to improve grip in wet conditions, performing at least as well as timber underfoot.
• It can’t be repaired if damaged. Individual composite boards can usually be lifted and replaced if one is damaged, without needing to redo the entire deck, particularly when a hidden fixing system has been used.

Environmental Impact of Composite Decking

Sustainability is an increasingly common question from customers, and composite decking generally compares well against other decking materials on this front. Most composite boards are made using a mix of recycled plastic, often sourced from post consumer or post industrial waste, combined with reclaimed wood fibre that would otherwise go to landfill.

Because composite boards last significantly longer than softwood and don’t require chemical treatments, stains, or sealants over their lifespan, the overall environmental footprint over 20 to 30 years can work out lower than repeatedly treating or replacing timber decking. It’s still worth checking with individual manufacturers, since the exact recycled content and sourcing varies between brands and product ranges.

Is Composite Decking Worth It?

For most households, particularly those with children, pets, or simply less time for garden maintenance, composite decking is worth the extra upfront cost. The combination of low maintenance, strong weather resistance, and a long lifespan usually balances out the higher price over the years you’ll actually use the deck.

If budget is the main priority and you don’t mind yearly maintenance, softwood remains a sensible choice. If you want a natural timber look with less upkeep than softwood, hardwood sits in the middle. Composite is generally the right call when low maintenance and long term durability matter more than the initial price tag.

Composite Decking and Property Value

While the exact impact on property value depends on your local market, a well finished composite deck tends to photograph well and present strongly during viewings, since it looks clean, consistent, and well maintained even years after installation.

For buyers who are wary of inheriting a timber deck that needs immediate re staining or repair, a composite deck in good condition can be a genuine selling point rather than a maintenance concern to factor into an offer.

Checklist: What to Ask Before Choosing Composite Decking

Before committing to a quote, it helps to ask a few key questions so you know exactly what’s included.

• Does the quote include ground preparation, or is that a separate cost?
• What brand and grade of composite board is being used?
• Does the board come with a capping layer for extra weather resistance?
• Is there a manufacturer warranty on the boards themselves?
• Are extra features like steps or lighting included in the price?
• What type of substructure and fixing system is being used?

Frequently Asked Questions

What is composite decking made of?

Composite decking is made from a mix of wood fibres and recycled plastic, compressed together to form boards that look like timber but require far less maintenance.

Is composite decking more expensive than timber?

Yes, composite decking typically costs £250 to £300 or more per square metre, compared with £120 to £250 per square metre for softwood or hardwood, though it needs much less ongoing maintenance.

Does composite decking need maintenance?

Composite decking needs very little maintenance. A simple clean with soapy water a couple of times a year is usually enough, with no staining or sealing required.

How long does composite decking last?

Composite decking generally lasts significantly longer than softwood and holds its colour and shape better over time, making it a strong long term investment for busy households.

Is composite decking slippery when wet?

Most modern composite boards include textured surfaces designed to improve grip in wet conditions, though this can vary between manufacturers and board types.

How long does composite decking installation take?

Most composite decking installations take three to five days, depending on garden size and how much ground preparation is needed.

Can composite decking be installed over an existing timber deck?

In some cases an existing substructure can be reused if it’s in good condition, though it’s usually inspected first, since composite boards are heavier than softwood and need a solid, level frame underneath.

Does composite decking fade in the sun?

Capped composite boards are specifically designed to resist fading from UV exposure far better than timber, though like any outdoor material, very slight colour settling can occur in the first few months after installation.

Book a Free Consultation for Composite Decking in South East London

If you’re considering composite decking and want an accurate price based on your actual garden, JPD Landscaping & Building Services offers free consultations across South East London.

Book a free consultation today to get expert advice and a clear, fixed price for your composite decking project.