You are using an outdated browser version not supported by this website.
Click here to upgrade your browser

Dynex Optivent Cavity Closer

New Dynex Optivent® takes innovation to the next level, with discreet ventilation and unique horizontal nailing grooves for easier installation. Available in Graphite or White to align with the cladding colour, the obscured slots help deliver an improved aesthetic and better vermin control.

Made in New Zealand from UV and impact resistant materials, Optivent cavity closers are BRANZ appraised and available through leading building merchants nationwide.

Key Features
  • Discreet obscured ventilation slots improve aesthetic
  • Horizontal fixing grooves
  • Available in two colours — Graphite and White
  • Graphite version to match dark cladding options
  • Made from UV and impact resistant material
  • Designed and made in New Zealand
  • BRANZ Appraised
  • Suitable for use with all relevant cladding types as per the current Dynex cavity closer range
  • Supplied in 3 metre lengths
  • Recyclable materials
NZ Made
NZ Made
Scope of Use

Dynex Optivent®  can be used in conjunction with wall cladding systems on timber and steel framed buildings within the following scope:

  • The scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1 with regards to building height and floor plan area; and,
  • With cavity-based weatherboard, fibre cement sheet, External Insulation and Finishing Systems [EIFS], stucco and plywood wall cladding systems complying with NZBC Acceptable Solution E2/AS1 or with any proprietary cavity-based cladding system covered by a current BRANZ Appraisal or CodeMark Certification; and,
  • Situated in NZS 3604 Wind Zones up to, and including Extra High and specific design wind pressures up to and including design differential ultimate limit state (ULS) 2.5 kPa
Limitations on Use

Dynex Optivent® has been designed for use in accordance with NZBC Acceptable Solution E2/AS1, Paragraph Any use outside this scope must only be undertaken once approval has been sought and granted from the manufacturer in writing.

Any painting of the cavity closers must ensure that the ventilation openings are not covered or compromised in size.

NZS 3604 Wind Zone Extra High suitable
Extra High Wind Zone
Statement of Building Code Compliance
  • Dynex Optivent® meets the durability requirements of NZBC Clause B2, Performance B2.3.1 (b) 15 years and B2.3.2.
  • Dynex Optivent® is a range of extruded uPVC and polymer based flashings designed to meet the requirements of E2/AS1 and are made in New Zealand.
  • Dynex Optivent® is covered by BRANZ Appraisal No. 911 (2021)
B2 Durability compliant
E2 External Moisture compliant
External Moisture
F2 Hazardous Building Materials compliant
Hazardous Building Materials
BRANZ Appraised
BRANZ Appraised
CAD Details
Optivent Brochure
BRANZ Appraisal

911 (2021)

Dynex deliver innovative, durable and attractive building solutions that make building and maintenance more cost-effective, while minimising any impact on the environment.

Product Enquiries

News from Dynex

Enhanced Cavity Closer Innovation
Palliside Weatherboards Balance Function and Style for this Waterfront Home
Palliside Weatherboards and Dynex Soffit Bring Low Maintenance Finish to Whangaparaoa Home
Get a free weekly digest of essential news

New and updated architectural products, design solutions, inspiration, technical advice and more when you sign up for EBOSS.