Budget Deck Build: Planning and Build Order
Use this guide to build a practical timber deck and avoid common mistakes with set-out, framing, and board fixing. The sequence is the main focus so you do not end up redoing work.
Difficulty
Intermediate
Estimated time
2-3 weekends
Typical budget
AUD 4,000-12,000
Objectives
- Set dimensions early so you waste less material.
- Keep the frame level and square before laying boards.
- Plan spacing and drainage so maintenance is simpler.
Materials & prep
- Posts, bearers, joists, and galvanised fixings
- Decking boards rated for your exposure class
- String line, laser or spirit level, framing square, packers
- Decking screws and spacing tools
- Exterior sealer or oil and applicators
Step-by-step checklist
- 1 Check council or site constraints and locate underground services.
- 2 Set finished deck height against door thresholds and drainage lines.
- 3 Install posts and bearers to consistent levels before fixing joists.
- 4 Check joist spacing against board specs and span requirements.
- 5 Plan board layout before you start so joins and edge cuts look deliberate.
- 6 Seal exposed cuts and set a repeating maintenance schedule.
Mistakes to avoid
- Framing first and checking threshold or runoff levels later.
- Ignoring timber movement and fixing boards too tight.
- Combining fasteners and treatment types that are not compatible.
- Leaving cut end-grain unsealed.
Compliance notes
- Large or elevated decks may need permits or certification under local rules.
- Bushfire-prone and coastal areas can change timber and fixing requirements.
- If structural complexity increases, get licensed design or trade support.
References
FAQ
Can I build a deck without concrete footings?
Many permanent decks require compliant footings. Confirm local rules before you start.
What spacing should I leave between boards?
Follow board-specific guidance from your supplier and account for humidity and timber movement.
How often should I reseal?
Commonly every 12-24 months, depending on product, weather exposure, and timber species.
