Why composite?
Composite boards are made from wood fibre or other materials and plastics. They don’t need oiling and are less prone to splinters, which suits pool areas and busy family decks. They usually cost more up front than hardwood and can get hot in full sun, especially darker colours.
Things to ask your builder
- ✓Which brand and range they’re quoting, and its warranty
- ✓Joist spacing to suit the board (each brand sets its own)
- ✓Hidden clips or face fixing
- ✓Ventilation and gaps under the deck
- ✓Whether the product is suitable for your bushfire attack level (BAL)
Typical cost
As a guide, low-level Australian hardwood decks (spotted gum or merbau) typically range from $450 to $680 per square metre, while elevated decks needing taller posts, stairs and balustrading, or composite boards, generally range from $650 to $950+ per square metre. Your builder will give you a firm price after measuring up on site.
Approvals, bushfire and structure
Before you build, check whether the deck needs approval, whether your block is bushfire prone, and whether it needs a balustrade. See deck approvals and structural specs for a plain-English summary, then confirm with your certifier or Shoalhaven City Council.
Frequently Asked Questions
Is composite decking cheaper than hardwood?+
Usually not up front. Composite and elevated decks generally range from $650 to $950+ per square metre, but you save on oiling over the years.
Can I use composite decking on bushfire-prone land?+
Some products are tested for certain BALs and some aren’t. Check the manufacturer’s BAL rating and confirm with your certifier.
How Nowra Deck Co works
Nowra Deck Co is a local lead-matching service connecting Nowra and Shoalhaven property owners with independent, licensed carpenters and deck builders. We don’t do the work ourselves. The builder you’re matched with quotes, builds and is responsible for the job. In NSW, a contractor licence is needed for residential building work, including decks and pergolas, valued at more than $5,000 in labour and materials. Check the builder’s licence on the NSW Government licence check before you sign, and for work over $20,000 ask for the Home Building Compensation certificate before work starts.