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AS/NZS 2908.2: the fibre cement flat sheet product standard

AS/NZS 2908.2 is the product standard for fibre cement flat sheets, splitting them into Type A (external) and Type B (internal). What it covers and why it matters.

By Chalkline. Last updated 25 May 2026. Verified 25 May 2026.

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AS/NZS 2908.2 is the product standard for fibre cement flat sheets in Australia and New Zealand. It sets the characteristics, test methods, and acceptance conditions that a fibre cement sheet must meet, and it is the standard that every fibre cement cladding, lining, and tile-backer product on the market is made to comply with. If you have ever specified a fibre cement sheet, you have relied on AS/NZS 2908.2 without necessarily naming it.

What it covers

The full title is AS/NZS 2908.2:2000, Cellulose-cement products, Part 2: Flat sheets (verified 2026-05-25). The standard:

  • Specifies the characteristics of fibre cement flat sheets (strength, density, dimensional and moisture behaviour).
  • Establishes the test methods and acceptance conditions a sheet must pass.
  • Is identical to and reproduced from ISO 8336:1993, the international fibre-cement flat-sheet standard, so Australian products align with the global benchmark.

It was reconfirmed in 2020, so it remains the current product standard despite its 2000 date.

Type A and Type B: the classification that matters on site

The single thing a builder needs to take from AS/NZS 2908.2 is the Type A / Type B split (verified 2026-05-25):

  • Type A: rated for external use, cladding, facades, soffits, and other weather-exposed applications.
  • Type B: for internal or protected external use only, partitions, floors, ceilings, and the like.

The distinction is not cosmetic. A Type B sheet used externally is outside its rating and will not perform in weather exposure. When you specify or substitute a fibre cement sheet, confirm it is the right type for where it is going, an internal lining board is not a cladding board, even though both are “fibre cement”.

What it is not

The candidate for confusion here is the standard number. AS/NZS 2908 is the cellulose-cement (fibre cement) product standard. It is not:

  • AS/NZS 2904 (damp-proof courses and flashings), a different product entirely, see AS/NZS 2904; or
  • AS/NZS 2208 (safety glazing materials).

Keep the numbers straight when reading a specification.

Product compliance versus install compliance

AS/NZS 2908.2 governs the sheet, not the installation. A compliant Type A sheet still has to be:

In other words, buying a 2908-compliant board is the start, not the finish. The wall is compliant when the right product is installed the right way.

For a builder

  • Check the type for the location. Type A for external, Type B for internal or protected. Do not put an internal sheet on a facade.
  • Trust the brand, verify the type. Major products (James Hardie, BGC, Cemintel) are made to AS/NZS 2908.2, but the range within a brand spans both types, so confirm the specific sheet.
  • Do not confuse product and install. A 2908-compliant sheet badly fixed, unjointed, or with raw cut ends is still a non-compliant wall.
  • Mind the silica dust. Cutting any fibre cement sheet releases respirable crystalline silica; cut with the right tools and dust control regardless of which type.

See also

Last updated: 2026-05-25. Verified: 2026-05-25. Quarterly review for currency.

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