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NZ Building Code · MaterialsStandard panel & sheet sizes
The fixed sizes NZ sheet products come in — so you can set out framing and rooms to land panels on studs with the least cutting and waste.
Sheet products — plasterboard, plywood, particleboard, fibre cement — come in fixed sizes. The smart move is to set out the framing and the job to those sizes so panels land on framing with minimal cutting and waste.
Why set out to sheet sizes
Getting the framing and room dimensions to match the sheets you’re ordering saves material and time on site.
- Keep stud and nog centres at 400 mm or 600 mm so sheet edges land on framing.
- Work room dimensions in round sheet multiples to minimise cutting and waste.
- Know the available lengths so you can pick a size that crosses a wall in one piece — fewer joints means less stopping and fewer cracks.
Plasterboard (GIB Standard)
GIB Standard comes in two widths — the 1350 mm sheet is wider, gives fewer joints and is common in modern builds.
- Width: 1200 mm or 1350 mm.
- Length: 2400, 2700, 3000, 3600, 4200, 4800, 5400 and 6000 mm.
- Thickness: 10 mm (Standard), 13 mm (Braceline, Fyreline 60), 16 mm (Fyreline 90).
- Aqualine (wet area): 10 mm and 13 mm.
- Barrierline (intertenancy): 25 mm × 600 × 3000 mm only.
Plywood, particleboard, OSB & MDF
Plywood (CHH EcoPly) runs off a standard 2400 × 1200 mm sheet, with other lengths and a range of thicknesses.
- EcoPly standard sheet: 2400 × 1200 mm; other sizes 1800 × 1200, 2700 × 1200 and 3000 × 1200 mm.
- EcoPly thickness: 7, 9, 12, 15, 18, 21 and 25 mm.
- Particleboard flooring: 2400 × 1200 × 18 mm T&G.
- OSB: 2400 × 1200 × 11/15/18 mm.
- MDF (Medex): 2440 × 1220 × 6/9/12/16/18/25 mm.
Fibre cement (James Hardie)
The James Hardie fibre cement range covers sheet linings, panels and weatherboards.
- HardieFlex / EasyLap: 2400 × 1200 × 6/7.5/9 mm.
- Axon Panel: 2440 × 1200 × 16 mm.
- Villaboard (wet area): 2400 × 1200 × 6 mm.
- Linea weatherboard: 4200 × 180/230 × 16 mm.
Plain-English guide, not advice. This page helps you understand and navigate the rules — it is general information, not design, engineering or consent advice, and it does not reproduce the copyrighted tables of NZS 3604 or any Standard. Always check the current Standard or Acceptable Solution and your BCA, and use a suitably qualified LBP, engineer or QS where it matters.
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Common questions
What are the standard GIB plasterboard widths and lengths?
GIB Standard plasterboard comes in 1200 mm and 1350 mm widths — the 1350 mm sheet is wider, gives fewer joints and is common in modern builds. Lengths available are 2400, 2700, 3000, 3600, 4200, 4800, 5400 and 6000 mm.
What is the standard plywood sheet size in NZ?
CHH EcoPly plywood runs off a standard 2400 × 1200 mm sheet. Other sizes are 1800 × 1200, 2700 × 1200 and 3000 × 1200 mm, in thicknesses of 7, 9, 12, 15, 18, 21 and 25 mm.
What stud and nog centres suit sheet products?
Set stud and nog centres at 400 mm or 600 mm and work room dimensions in round sheet multiples, so panels land on framing with minimal cutting and waste.
Which sheets suit wet areas?
For plasterboard, Aqualine is the wet-area board in 10 mm and 13 mm. In fibre cement, Villaboard is the wet-area sheet at 2400 × 1200 × 6 mm.
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