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The next generation weather defence air barrier by JamesHardie®

With superior fire resistance, water-tightness and breathability, HardieWindbreaker™ sheathing helps new builds stand the test of time. HardieWindbreaker™ board can be applied to the outer studs, joists, and rafters of a building to strengthen the structure and serve as a base for an exterior weatherproof ventilated rainscreen cladding system. It can used as part of either steel or timber frame structure.

HardieWindbreaker™ Sheathing board

Introducing HardieWindbreaker™ sheathing board, the next generation weather defence air barrier by James Hardie.

With superior fire resistance, water-tightness and structural racking strength, HardieWindbreaker™ sheathing helps new builds stand the test of time.

  • A quicker build: early close-in avoids weather delays, removing the need to reschedule trades and reducing unplanned equipment hire costs. Our boards will not warp or shrink when exposed to adverse climates and offer a guaranteed 12 months exposure during construction.
  • A simpler build: offers a complete solution for external wall racking strength and structural connectivity. Lightweight, easy to cut, flexible to handle and fix.
  • A more weather-tight building: provides superior weather-tightness as our water-repellent sealant stops moisture getting in; the board’s breathability allows moisture vapour to get out.
  • A stronger building: made from engineered fibre cement, adding strength to your building.
  • A quieter building: better soundproofing helps to absorb unwanted noise.
  • Made for extra high wind zones: our boards help to equalise the air pressure inside the outer wall cavity, allowing your building to stand up to extra high wind zones.
  • Guaranteed & tested for peace of mind: made from advanced material fibre cement, the boards won’t crack, warp, swell or rot, and come with a full 15-year James Hardie warranty.
  • BBA Certified - Certificate 20/5777


HardieWindbreaker™ boards are 9mm thick, produced in three sizes: 1200 x 2400 mm, 1200 x 2700 mm and 1200 x 3000 mm. Our sheathing boards are suitable for both steel and timber frame constructions and can be fixed using both screws and nails. 
Composition: Portland cement, sand, cellulose fibre, water, selective additives
Properties: With added sealer to enhance moisture resistance, providing a water tight barrier
Dimensions: 1200 x 2400 x 9 mm;
1200 x 2700 x 9 mm;
1200 x 3000 x 9 mm
Weight: 13.1 kg/m2
Fire rating: A2, s1-d0
Warranty: 15 years

JamesHardie® tools and accessories

To make sure you have just everything you need to complete your job successfully, we offer a great selection of JamesHardie® accessories.

Order your Personalised Sample Box today

Discover our new premium interlock cladding HardiePlank® VL with a product sample - the perfect way to get a real feel for the material in your own hands.
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