Is composite decking worth it? How to decide without the sales pitch

Composite decking is the dearer buy up front, and in return you skip the yearly oiling. Whether that trade suits you depends on how long you keep the deck, how much sun it gets and how you feel about a weekend each spring with a tin of oil. I won't put a figure on any of it here, because board prices move by state and by month. The prices page shows what boards are going for today, and the cost per m² calculator will do the sums on your deck. This guide is about how to think about the question.

Is composite decking worth it? Start with how long you will own it

Every argument for composite is an argument about the future: the oil you don't buy, the weekends you don't spend on it and any timber boards you'd otherwise replace. If you'll be in the house for fifteen years, all of that lands in your pocket. If you're renovating to sell in three, most of it lands in the next owner's.

One big retailer says it plainly: composite is the dearer option, and a timber deck needs oil or a timber finish every year¹. Reviewers of a common decking oil on ProductReview talk about a fresh coat every six to twelve months, and one with a north-facing deck wrote that it stopped repelling water within a few months². The oil is the small part and the labour is the big one. A Whirlpool member wrote in December 2025 that timber is "days of work to maintain", counting the pressure washing and the wait for it to dry, then a couple of coats of oil and the cleaning of the gear afterwards⁹.

How much does composite decking cost, compared with what?

On cost, composite sits above hardwood decking and hardwood above treated pine, by the big retailer's own guide. The frame is a separate cost, and composite can need more joists than a timber-spec frame. One composite maker's maximum is 450 mm centres for a home deck⁷, while Timber Queensland's advice lets 19 mm hardwood decking span 500 mm⁸. The spread inside the composite category is wide too. A Whirlpool member who'd had Ekodeck for about a year wrote in August 2024 that their first choice, a premium American brand, was almost three times the price for materials¹⁰. Brand and cap type set the tier, and the composite decking hub lists the boards sold here with prices for your state, and you can sort them by price.

A sensible way to compare is per square metre installed, over ten years. The timber total is the boards and the frame plus ten years of oil and your time or a tradie's. The composite total is the boards, a frame at the board's joist spacing and a wash each year. The calculator does the arithmetic. The unknown it can't price is the value of your Saturdays.

The pros, in owners' words

The long-term owners quoted here tell much the same story. A Whirlpool member with an eighty square metre composite deck on a steel frame wrote in July 2020 that after four years it looked like the day it went down, with a pressure clean once a year, and that they'd do the same again tomorrow¹¹. Another, with a deck laid in 2011 in full sun, wrote in June 2018 that it hadn't splintered, bowed or warped, and that they'd buy it again¹². An Ekodeck owner on ProductReview wrote in May 2026 that their deck had been down since 2013 in the western sun and was still in excellent shape with some fading¹⁴. A member on the December 2025 Whirlpool thread with a small composite alfresco wrote that four years in, the only upkeep had been a hose and a broom⁹.

The cons, in owners' words

Heat is the regret that comes up most in these reviews. An Ekodeck owner on ProductReview wrote in July 2025 that the deck gets extremely hot underfoot, and that in hindsight they should have chosen timber¹⁴. A Trex owner in New South Wales wrote in August 2024 that any sun on the deck "burns the feet"¹⁶. Another Ekodeck owner on the same listing wrote in May 2025 that the deck got too hot to walk on and opened gaps between the boards in cold weather¹⁴. That owner had to sand green mould off every year, and paid to have the deck removed in 2024. A Whirlpool member wrote in August 2024 that composite samples they had put in the sun beside several timbers the year before came out about 10°C hotter on average on a thermal camera¹⁰. They worked out that the premium would have paid for a few years of someone maintaining a timber deck, and went with large-format paving instead. I'd start with shade and a light colour, and does composite decking get hot explains what works.

Fading is the second. A ModWood owner wrote on ProductReview in November 2023 that the jarrah-coloured deck faded to a soft pink within three months¹⁵. Another on the same listing, with a deck more than ten years old, wrote in April 2026 that at around eight or nine years the colour had started running out of the boards when wet, and that the boards had warped, split and shrunk to leave gaps at the joins¹⁵. A Trex owner in Western Australia wrote in July 2024 that five years in, the deck had completely faded from the warm timber look they paid for¹⁶.

Some early colour change is normal. One maker puts most of its uncapped board's change in the first couple of months³. Longer-term fade is what capped boards and their fade warranties are for, and one maker warrants its capped range against colour change beyond a set limit³. If colour matters to you, I'd pay for the cap. See composite decking fading and scratches.

Replacement boards are the third. A damaged timber board can be sanded and oiled. On a capped composite board, deep damage usually means a new board, and one maker tells owners not to sand its capped boards at all⁶. If the deck has faded by then, the new board stands out. A ModWood reviewer on ProductReview wrote in May 2025 that one broken board meant replacing the boards across the whole area to get a colour match. The reviewer's follow-up says the boards were in a screen, and the same fading applies on a deck¹⁵. Another owner, on an Ekodeck listing, wrote in January 2026 of ending up with three darker boards after running short and not being able to get more in the same colour¹⁴. I'd buy a few spare boards from the same batch and store them out of the sun, and one maker advises buying the whole job from one batch to avoid colour variation⁷.

What the warranties actually cover

The long warranties are a real part of the value, but read the fine print. One Australian maker gives its capped range a limited twenty-five-year residential warranty⁴, against a limited ten-year residential warranty for its uncapped range³. Another says its capped boards carry a twenty-five-year warranty against fading, staining, rotting and splintering, and against the cap coming away⁵. Then read the exclusions. One maker's warranty excludes improper installation, naming wrong gaps as an example, and it excludes movement of the frame the boards sit on⁶. That maker tells owners not to pressure wash its capped boards, and it won't cover a failure to follow its maintenance guidelines⁶. Mould claims are limited to two years, and static build-up isn't covered at all⁶. Residential cover is pro-rata too, stepping down after the tenth year⁶. The guide on composite decking lifespan and warranty goes through the exclusions.

The frame decides whether it was worth it

This is the part I'd check hardest. The mistake I'd guard against first is a board warranted for twenty-five years going onto H3 pine joists that are already ten years old, or onto a new frame with the posts in damp soil. If the frame fails first, the money saved on it is spent again pulling good boards up. A Whirlpool member put it bluntly in March 2023, telling a first-time builder that the "composite board is expensive and not worth it" if it lasts two or three times as long as the timber under it¹³. One composite maker also says timber joists will eventually rot, depending on the timber. Its answer is a waterproof tape along the top of each joist⁷. Price the frame properly, and read steel vs timber deck frame for composite decking if the deck is close to the ground.

Composite decking pros and cons in one place

Composite is worth it when you'll own the deck for ten years or more, and when the site has afternoon shade or you'll build some. It makes most sense near a pool or close to the ground where timber rots. It also suits anyone who hates oiling. Stretch to a capped board if you can.

It's a poor buy when the deck is in full western sun with no shade planned, or when you want to sell soon. It's also a poor buy if you like the feel of real timber and don't mind the upkeep, or if the budget only reaches an uncapped board on an old frame. Composite decking problems and disadvantages goes through the complaints one by one, with how to avoid each.

Before you order

Price the whole job, not the boards. Run your deck through the deck designer to get a boards-and-frame list at the right joist centres, and use the cost per m² calculator to price the composite boards at your state's average. That calculator prices boards only, so I'd get the frame and the timber deck you were weighing it against quoted the same way. Add ten years of oil and labour to the timber side. Put a sample of your chosen colour in the sun on site and touch it at three in the afternoon. If the sums and the sample both come out your way, composite is worth it, and if one of them goes against it, read why Australians are switching from timber to composite for the reasons people give on each side before you decide.