Composite decking is made by blending wood fibres with plastic and binding agents to form strong, long-lasting boards that look like timber. What sets it apart is how it combines natural appeal with engineered durability. This mix results in a material that doesn’t warp or splinter like traditional timber might.

 The boards are extruded in factories under controlled conditions. During the process, everything from the moisture content to the grain texture can be controlled. This is why the final product tends to have more consistency in look and size than timber does. It’s also why composite boards often come with more colour options and surface patterns.

Another key factor is how little effort is needed to keep composite decking in good shape. Timber might need oiling or sealing every few months, but composite is usually designed to resist fading, stains, and mould growth from the start.

What Makes It Different from Timber?

Unlike timber, composite boards don’t absorb as much water. That means they’re less likely to swell, crack, or develop splinters. They’re also insect-resistant, so there’s no need for treatments to keep termites away.
Timber also fades and greys over time unless it’s regularly maintained. Composite tends to retain its colour longer, especially if the board is capped. The texture also stays consistent, without the grain lifting or surface becoming uneven.
While timber has a classic charm, composite offers a practical alternative. It gives a similar look without the ongoing costs and time investment. You still get the warmth of wood, just without the headaches that can come with it.

How Are Boards Manufactured?

Boards are made through a process called extrusion. This involves heating the mix of plastic and wood fibres and then pushing it through a mould to form a consistent shape. Some manufacturers also use co-extrusion to apply a protective cap layer, which increases stain and fade resistance.
The surface texture can be stamped or brushed into the board while it’s still warm. This allows for a wide range of finishes, from smooth to deeply embossed wood grain.
Quality control plays a big role during manufacturing. Each board is checked for uniformity in size, shape, and surface. That means once you start laying your deck, there’s less variation between boards, making the installation smoother and more predictable.

Core Materials Inside a Composite Board

Composite decking typically includes a mix of recycled plastic and wood by-products. The plastic provides structure and durability, while the wood fibres add strength and a more natural appearance. This balance is what gives composite its unique blend of toughness and charm.
The mix can vary between products. Some boards have more wood content, which may make them feel warmer underfoot, while others use more plastic, which may boost moisture resistance. Some even include UV inhibitors or anti-fungal treatments built into the formula.
Knowing what’s inside your boards can help you pick the right one for your climate and use case. Boards with higher plastic content may suit wet or humid environments, while those with more wood fibre could provide better grip and a more traditional feel.

Wood Fibre Percentage

Most boards contain around 50 to 60 percent wood fibre. This helps keep the appearance close to real timber, but it’s still low enough to prevent many of the issues timber faces with moisture. The wood content can be anything from sawdust to recycled pallets, depending on the supplier.
Wood content also affects how the board behaves under heat. More wood can mean slightly higher expansion and contraction, which should be accounted for during installation. That’s why spacing recommendations are so important.

Plastic Blends and Additives

The plastic in composite boards is often recycled polyethylene or polypropylene. These plastics provide strength and protect against rot. Some boards use PVC blends, which are more resistant to water and stains but may feel harder underfoot. Like pvc decking australia products, boards with higher PVC content tend to excel in areas with heavy rainfall.
Additives can include UV stabilisers, colour pigments, bonding agents, and anti-microbial treatments. These extras may not be visible but they play a big role in performance. Boards with better UV protection tend to hold their colour longer in full sun.

Board Profiles and Surface Finishes

Composite boards come in a variety of shapes and finishes. These features affect both how the board looks and how it performs once installed. Choosing the right type is important depending on where and how you plan to use the deck.
There are hollow and solid profiles. Hollow boards are lighter and cheaper to transport, while solid boards feel more like timber and often perform better under high foot traffic. Both have their place, and the choice often comes down to cost and personal preference.
Surface finishes vary from brushed and grooved textures to embossed wood grain. Some are smooth, which can look clean and modern, while others are heavily textured for better slip resistance and a more rustic feel.

Solid versus Hollow Boards

Solid boards usually feel sturdier underfoot and produce less noise when walked on. They also tend to support higher loads, which is helpful for stairs or areas with heavy furniture. Many homeowners prefer solid composite deck boards for precisely this reason.
Hollow boards have internal chambers that reduce weight. They’re easier to cut and handle but may need extra support depending on the span. They can sometimes sound a little more hollow when walked on, which might be noticeable on elevated decks.
For most backyard projects, either type can work well as long as the subframe and fixings are done correctly.

Capped and Uncapped Surfaces

Capped boards have a protective outer layer that wraps around one or more sides of the board. This cap is usually made from a different type of plastic that’s more resistant to staining and fading. Capped boards are easier to clean and tend to stay looking new for longer.
Uncapped boards don’t have this layer. They can still perform well but may need more cleaning and are more likely to stain if food or oil spills are left untreated. Uncapped boards may also fade faster over time with sun exposure.

Colour Choices and Texture Options

Composite decking comes in a broad range of colours. You’ll find greys, browns, reds, and even charcoal black tones. Lighter shades work well in coastal or sun-drenched spaces, while darker tones suit modern designs with clean lines and bold contrast.
Some boards include multi-tonal finishes that mimic natural timber grain. These colours are usually mixed during manufacturing so they won’t rub off or fade in patches. A textured surface can also make a huge difference in how realistic the board looks.
The range of colour and texture makes composite decking suitable for all types of architecture, whether it’s a coastal shack or a slick city patio. You can also find matching fascia boards and screening options that help tie the look together.

Light Tones for Coastal Homes

Light greys, sandy beige, and soft browns suit homes near the coast. These tones stay cooler underfoot and reflect more light, which can be helpful in full sun. They also hide salt marks better than darker boards.
These colours often pair well with light-coloured paving or pale render finishes. They can help make outdoor spaces feel bigger and more open, especially when used with wide board profiles.

Dark Shades for Modern Looks

Charcoal, espresso, and slate tones are popular in modern or industrial-style homes. These colours create contrast and bring a bold, confident tone to any space.
Dark boards can get warmer in the sun, but they usually look clean longer, especially in areas with lots of dust or leaves. Paired with metal railings or minimalist lighting, they can produce a striking outdoor space that doesn’t look like a copy of timber.

Strength and Stability in Harsh Australian Weather

Composite decking is built to handle the range of climates found across Australia. Whether it’s dry inland heat, coastal moisture, or frosty southern winters, these boards are designed to resist cracking, swelling, and warping.
The plastic in the boards helps protect against rot and termites. It also reduces how much water the boards absorb. This makes them less likely to move over time and keeps the surface safe for walking on without splinters or splits.
In coastal regions around New South Wales, searches for composite decking sydney highlight the need for materials that can stand up to salt air and strong UV. The added stability also helps reduce maintenance. Because the boards don’t shift or twist as much, they’re less likely to pop screws or warp around fixings.

Resistance to Moisture

Water is one of the main causes of damage in timber decks. Composite boards don’t soak up water like wood does, so they won’t swell or shrink every time it rains.
That doesn’t mean they’re completely waterproof, but it does mean they dry faster and are less likely to develop mould or mildew. Capped boards offer even better moisture resistance and are often used around pools or in tropical climates.

Handling UV Exposure

Sun can bleach and weaken natural timber over time. Composite boards are often made with UV inhibitors that slow down fading and keep colours more stable over the years.
This is important for Australian backyards where the sun can be intense. It means your deck will still look fresh even after years of summer barbecues and direct sun.

Slip Resistance and Safety

Safety is one of the most important factors when building any deck, especially in spaces where children, elderly people, or pool areas are involved. Composite decking tends to offer better slip resistance compared to polished hardwood or stone when dry, and the right texture can also provide grip when wet.
Many composite boards are tested for slip ratings, which helps you compare options for areas prone to rain, spills, or pool water. Boards with deeper grain or brushed finishes usually perform better in wet conditions.
Safety also extends to heat retention. Some darker boards may become warmer underfoot in full sun, but generally, composite does not splinter, crack, or break like timber, reducing the risk of cuts or falls.

Surface Grip Ratings

Most boards have a surface grip rating or slip resistance score. These scores are tested under both dry and wet conditions. When choosing a board, especially for stairs or areas around water, it helps to check this rating and pick a board with a proven slip score.
Finishes like deep wood grain or narrow grooving tend to increase grip. Boards with smooth finishes might look sleek but can be slippery when wet, so they’re best kept to covered areas.

Safe Installation Tips

Safety starts with proper installation. Boards need the right spacing to allow for drainage and expansion. If boards are too tight, water can pool and increase slipperiness. If too loose, it can create trip hazards.

Secure fixings are also critical. Boards that move underfoot can lead to slips or falls. Hidden fasteners provide a clean finish but must be installed to spec. Any raised edges, warped boards, or exposed screws can become hazards if ignored.

Maintenance Needs Across the Years

One of the big appeals of composite decking is how little maintenance it needs compared to timber. There’s no oiling, sanding, or sealing required every few months. Most boards just need a good clean every now and then to stay in shape.
Still, some upkeep is needed. Leaves, dirt, and moisture can build up, especially in shaded or high-traffic areas. Regular sweeping and a quick hose down with soapy water will usually keep things tidy.
If your deck is near a BBQ or food area, spills should be cleaned quickly to avoid staining. Even with stain resistance, letting things like oil or wine sit too long can leave marks.

Routine Cleaning

The simplest way to clean your deck is with a broom and garden hose. For deeper cleans, a mop or soft-bristle brush with warm soapy water usually does the trick. Avoid harsh chemicals or high-pressure washers unless the manufacturer says it’s safe.
Focus on getting into the grooves and grain lines, especially if your board has a textured finish. Dirt and pollen can settle in those areas and cause discolouration over time.

Stain Removal

If a stain sets in, use warm water and dishwashing liquid first. For more stubborn marks, like grease or tannin, a gentle degreaser and a gurney may help. Some manufacturers recommend specific composite cleaners, but always test a small area first.

 Avoid bleach or anything too abrasive, as these can damage the surface of the board or change the colour unevenly.

Lifespan and Warranty Considerations

Composite decking is built to last. Most boards will comfortably go 20 to 30 years with minimal maintenance, depending on climate, traffic, and how well it was installed. That’s why many suppliers offer long-term warranties.

Keep in mind, the warranty usually covers structural integrity and not surface fading or staining. Some high-end boards include fade and stain protection too, but you’ll need to check the terms.

 The lifespan often comes down to how well the subframe is built and whether the boards are spaced properly. Bad drainage or poor airflow can shorten the life of even the best board.

Typical Service Life

Most composite decks will last longer than timber without needing to be replaced, repainted, or resanded. Even in tough climates, properly installed boards hold up well against temperature swings, rain, and sun.
Hollow boards may not last quite as long as solid ones under heavy load, but with the right framing they still perform for decades. The better the product and installation, the longer the deck will look and feel like new.

Reading Warranty Terms

Always read the warranty in full before buying. Some warranties require you to follow specific installation rules or use certain fixings. Failing to do this could void the warranty.
Check what’s covered and what isn’t. Structural failure is often covered, but fading, mould growth, or damage from poor cleaning techniques may not be. A longer warranty doesn’t always mean better quality, but it often shows confidence in the product.

Comparing Costs with Timber Over Time

The upfront cost of composite decking is usually higher than standard timber, but when you factor in maintenance and longevity, the picture changes. Timber needs oiling, sanding, and fixing, which adds up over time.
The composite decking price varies depending on board profile, finish, and whether the product is capped, but it rarely needs replacing, and the cost of upkeep is minimal. Over ten or twenty years, many people find that composite works out cheaper. You don’t spend every summer fixing or replacing boards, and your deck stays looking good with minimal effort.

Up-front Material Prices

Composite prices vary based on profile, finish, and brand. Hollow boards are generally more affordable than solid ones. Capped boards cost more but offer extra protection. Timber may be cheaper per metre, but those savings often disappear once you add stain, sealant, labour, and ongoing repairs.
Also, think about waste. With composite, there’s usually less wastage as boards are straighter and consistent in length. That can bring down costs during installation.

Long-Term Upkeep Spend

Timber maintenance costs can include oil, paint, sanding tools, brushes, and labour. Over the lifespan of a deck, that can add up to thousands. Composite avoids most of these costs.
It also saves time. Instead of spending weekends sanding or sealing, you’re just giving it a wash and moving on with life. That convenience has value too, especially for busy households.

Sustainability Talking Points

Composite decking is often made from recycled materials. This helps reduce landfill waste and creates a use for plastic and wood by-products that might otherwise be thrown away. For those who care about sustainability, this makes composite an appealing choice.
Boards with higher recycled content are available, and some are even made with materials from post-consumer waste. While not all boards are recyclable at the end of their life, many can be reused or repurposed depending on local facilities.
The long lifespan also means less waste over time. Timber decks may need replacing every decade or so, but a well-maintained composite deck can go much longer without ending up in a skip.

Recycled Content

Check the specs of each product to find out how much recycled content is included. Some boards contain over 90 percent recycled material, which significantly reduces environmental impact.
This includes both plastic and wood fibre, often from sources like recycled bags, bottles, and sawmill waste. Using this waste keeps it out of oceans and landfills.

End of Life Recycling

Some composite boards can be recycled again at the end of their life. It depends on the product and the recycling options in your area. Solid boards are easier to repurpose, while capped ones may be harder to break down.
Still, the longer lifespan means fewer replacements and less environmental damage overall. It’s a step towards a more circular approach to building materials.

Bushfire Performance and BAL Ratings

In many parts of Australia, bushfire compliance is non-negotiable when it comes to building outdoor structures. Composite decking can be a suitable option for bushfire-prone areas, but it must meet certain standards, including BAL (Bushfire Attack Level) ratings.
BAL ratings range from low risk to flame zone. To use composite decking in high BAL-rated areas, the board must pass strict tests for fire resistance, ignition, and spread. Not all boards are compliant, so checking the technical data is important before planning a project.
Boards with higher plastic content tend to perform better in flame tests, especially those made with fire-retardant additives. Proper subframe materials and installation spacing also contribute to fire performance.

Relevant Standards

If you’re building in a BAL-rated area, your deck must comply with AS 3959. This Australian Standard outlines the materials and construction requirements for bushfire-prone zones. It sets clear criteria for ignition, heat release, and ember resistance.
Some composite decking products have been independently tested to meet BAL 12.5 or BAL 19. Higher ratings like BAL 29 may require additional measures such as non-combustible framing and special fasteners.
Make sure to get the testing documentation and confirm the board’s rating before installation. Failing to comply can affect your building approval and insurance cover.

Choosing Compliant Boards

To stay within regulations, only choose boards that have been officially tested and approved for use in bushfire zones. Look for boards with test reports or certifications from local authorities. Ask for the BAL rating in writing and check that the supporting system, like joists and bearers, also meets code.
Even if you’re outside a regulated zone, it’s worth considering fire performance, especially in dry inland regions or areas with a history of fire.

Installation Fundamentals

Installing composite decking correctly is just as important as picking the right board. Even the best board won’t perform well if it’s installed on a weak or unlevel subframe. Planning, spacing, and fixing methods make a big difference to how the deck feels and lasts.
Composite decking expands and contracts differently to timber. It needs room to move with temperature swings. Following spacing guides helps prevent boards from warping, buckling, or pushing up against each other.
Using compatible fasteners also prevents damage. Most boards are designed for hidden fastener systems that sit between boards and hold them in place without visible screws on the surface.

Subframe Planning

A strong subframe is the foundation of any deck. Use treated timber or steel that meets your local code, and make sure it’s level and spaced according to manufacturer guidelines. Joist spacing must match the board’s span limits, too far apart and the board will sag or bounce.
Drainage and ventilation under the deck are essential. Stale moisture and trapped air can create mould and reduce the lifespan of the deck. Lift the deck slightly above the ground and leave open space underneath if possible.

Hidden Fastener Systems

Hidden fasteners create a cleaner finish with no screw heads on top of the boards. They also allow boards to expand and contract without splitting or cracking. These clips usually slot into grooves along the board edges and are screwed into the joists.
Always use fasteners recommended by the board manufacturer. Generic screws or clips can damage the material or void the warranty. The right fasteners also ensure consistent gaps between boards, which helps with drainage and expansion.

Common Mistakes and How to Avoid Them

Even with a good product, poor installation or bad habits can ruin a deck. Knowing what to avoid helps prevent problems before they start. Some of the most common issues are caused by poor spacing, bad airflow, and incorrect fixings.
If you rush the planning stage or skip the technical guides, you could end up with boards that move, squeak, warp, or hold water. These issues are hard to fix after the deck is built.

Spacing Errors

Composite expands and contracts more than timber, so spacing is critical. Boards that are installed too tight may buckle in hot weather. Boards that are too loose can create trip hazards and look untidy.
Follow the expansion spacing chart provided by the manufacturer. Use spacers during installation and make sure boards are laid in the same direction to keep movement consistent.

Drainage Oversights

Water build-up under the deck can create big problems. It can lead to mould, board swelling, and a shorter lifespan. Decks should be built with a slight slope to allow water to run off. Never build a composite deck flush against a wall or fence without allowing for airflow and drainage.
Make sure your subframe materials are moisture-resistant, especially if your deck is low to the ground. Adding landscaping fabric or gravel underneath can help prevent weeds and promote drainage.

Request a free sample, explore our full range of composite decking products, or watch our video collection to see how Brite Decking can support your next sustainable project.