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Siniat Weather Defence™ Board

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A sheet of lavender-faced Siniat Weather Defence board, fire-rated, mould & moisture-resistant plasterboard for external use.
A mid-rise building being constructed using Siniat Weather Defence weather-resistant sheathing board on its external walls.
A four-storey apartment building using Siniat Weather Defence, a fire-rated, moisture-resistant plasterboard for sheathing.

Details

Siniat Weather Defence is a high-performance external sheathing board designed to deliver superior protection in Australian construction conditions. Made with a glass fibre-reinforced gypsum core and a special weather-resistant coating, it provides excellent resistance to moisture, wind, mould, and fire—making it the ideal weather-proof plasterboard for external wall systems behind cladding.

This board is a game-changer for builders and installers needing a fast, reliable and durable solution. Unlike traditional sheathing boards, Siniat Weather Defence can be left exposed for up to 12 months, allowing construction to continue without delays due to weather.

Best Applications:

  • Commercial and residential external facades
  • Lightweight steel or timber-framed construction
  • Modular builds
  • Projects requiring an FRL-rated external wall system

Key Features of Siniat Weather Defence Board:

  • Weather-resistant sheathing – can remain exposed for up to 12 months
  • Fire-rated plasterboard for external use (FRL compliant) – suitable for fire-rated external walls
  • Mould and moisture resistant – protects the frame during construction
  • Dimensionally stable – minimal movement or swelling
  • Quick to install – no need for additional sealing or wrapping
  • Low maintenance and long-lasting

If your project needs a sheathing solution that handles Australia’s unpredictable weather, choose Siniat Weather Defence. Available now from Westgyp, your trusted sheathing and plasterboard supplier in WA.

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Resources

SAP Material Length Width
13 x 1200 x 2400 Weather Defence™ 4082431 2400 mm 1200 mm
*for the most up to date information get in touch with Westgyp