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ENCLOSURE™ Sheathing System
Description

ENCLOSURE™ Sheathing System comprises ENCLOSURE™ sheathing board, an adhesive ENCLOSURE™ Facade and Roofing Membrane, fixings and ENCLOSURE™ Seismic bracket. Installed behind the façade, it provides airtightness, secondary weather resistance, and structural performance while supporting the long-term durability of the building envelope.

As a critical component within The Building Agency's Integrated ENCLOSURE™ System approach, the ENCLOSURE™ Sheathing System allows performance requirements to be addressed before the façade is selected. By combining structural bracing, weather resistance, fire performance, and air-sealing functions into a single system, the ENCLOSURE™ Sheathing System helps simplify wall construction while supporting compliance with the New Zealand Building Code.

Key Features
  • Rigid Air Barrier & Secondary Weather Protection
  • Suitable for tested fire-rated wall assemblies (AS 1530.4:2014)
  • Wind zones: Up to and including Extra High (NZS 3604)
  • Can be used as a wall bracing system for timber-framed buildings within the scope of NZS 3604
Scope of Use
  • Timber framing is designed within the scope of NZBC E2/AS1
  • Light gauge steel framing complies with NASH Standards
  • Buildings are located in wind zones up to and including Extra High
  • Cladding systems are installed over a minimum 18mm drained cavity
  • Walls are located at least 1 metre from the relevant boundary
Statement of Building Code Compliance
  • Contributes to compliance with B1.3.1, B1.3.2, B1.3.3 and B1.3.4 requirements for structural performance.
  • Currently undergoing testing to demonstrate compliance with B2 durability requirements B2.3.1 (a) & B2.3.1 (b).
  • Contributes to compliance when incorporated into tested fire-rated wall assemblies C3.6 & C3.7.
  • Contributes to compliance E2.3.2 when used within drained and ventilated cavity wall systems.
  • Complies with the requirements of NZBC Clause F2.3.1.
Other Performance Attributes

Architects specify the ENCLOSURE™ Sheathing System because it shifts building envelope design from a façade-first approach to a performance-first methodology.

  • Provides airtightness and secondary weather resistance
  • Contributes to structural bracing performance
  • Compatible with fire-rated wall construction
  • Supports timber and steel-framed building systems
  • Compatible with a wide range of cladding materials
  • Forms a key component within an integrated enclosure strategy
  • ENCLOSURE™ Sheathing System helps create high-performance wall assemblies where structure, weather resistance, fire performance, and façade systems work together as a coordinated whole.
Documents
BPIR Product Statement: ENCLOSURE Sheathing

1 May 2026

BRANZ Fire Testing

1 July 2026

Additional information

Distributors of high-performance façade, roofing, and cladding systems for architects and builders, featuring trusted brands like Siderise, AliClad, Innowood, Equitone, ALPOLIC™, and Barracuda

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