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Dynex DynaFlash

DynaFlash is a universal back-flashing manufactured in New Zealand using modern polymer based materials and is designed for vertical installation behind exterior claddings where they change in direction or transition with other claddings. When installed as designed, DynaFlash will provide a secondary line of protection at these points and a path for any moisture to exit below.

Key Features
  • Available in three different sizes; 100mm wide (50x50), 150mm wide (75x75) and 200mm wide (100x100).
  • Manufactured in 25m ‘coils’, helping to eliminate joints and reduce waste.
  • Conveniently designed dispenser box to make the handling and storage of DynaFlash easy for the builder.
  • Can be shaped into any angle so it can be used behind all exterior cladding external corners and internal corners, while also being suitable as a flat back-flashing.
  • DynaFlash features the placement of uniquely designed ‘co-ex’ beads which run along each edge of the flashing.
  • Can be fixed in place on the outside of these beads, avoiding any potential compromise to the flashings integrity. These co-ex beads are compressible, allowing the exterior cladding to be installed easily without having to reduce the thickness of the cavity battens or flatten flashing hems.
  • DynaFlash is made in New Zealand using 100% recyclable materials.
NZ Made
NZ Made
Scope of Use

DynaFlash Flashings have been appraised for use as concealed flashings 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 direct fixed or cavity-based wall cladding systems complying with NZBC Acceptable Solution E2/AS1 or with proprietary direct fixed or cavity-based cladding systems covered by a valid BRANZ Appraisal; and,
  • situated in NZS 3604 Wind Zones up to, and including Extra High.

Note: DynaFlash can also be used on buildings subject to specific weathertightness design. Weathertightness design and detailing of these installations is the responsibility of the designer and is outside the scope of the BRANZ Appraisal.

Limitations on Use
  • Must not be exposed to weather or UV light for a total of 90 days before being covered by wall cladding
Statement of Building Code Compliance

In the opinion of BRANZ, DynaFlash Flashings if designed, used, installed and maintained in accordance with the statements and conditions of BRANZ Appraisal 913 will meet or contribute to meeting the following provisions of the NZBC:

  • Clause B2 DURABILITY: Performance B2.3.1 [b], 15 years and B2.3.2. DynaFlash Flashings meet these requirements. See Paragraphs 8.1 and 8.2.
  • Clause E2 EXTERNAL MOISTURE: Performance E2.3.2. DynaFlash Flashings contribute to meeting this requirement. See Paragraphs 11.1 and 11.2.
  • Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1. DynaFlash Flashings meet this requirement and will not present a health hazard to people.

The BRANZ Appraisal is of an Alternative Solution in terms of New Zealand Building Code compliance.

Other Performance Attributes
  • Serviceable life — see BRANZ appraisal: DynaFlash Flashings are expected to have a serviceable life equal to that of the cladding
B2 Durability compliant
E2 External Moisture compliant
External Moisture
F2 Hazardous Building Materials compliant
Hazardous Building Materials
BRANZ Appraised
BRANZ Appraised
CAD/PDF (link to page on supplier website)
Installation Details (link to page on supplier website)
BRANZ Appraisal 913

No 913 [2021]


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

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