DuPont Tyvek Pro is designed for temporary weather protection during construction and as a secondary weather barrier in service.
Suitable for use under dark coloured roofs without support in horizontal installed applications above 3° and vertical applications above 10° roof pitches.
DuPont Tyvek Supro shall be installed in accordance with New Zealand Building Code Compliance Document E2/AS1, NZMRM Roofing Code of Practice.
Shingle lapped minimum 150mm when laid horizontally for roof pitches above 3°
Supported when laid vertically between 3° and 10° roof pitches or unsupported above 10°
Installed as to ensure water sheds to gutter
Laid continuously or lapped 150mm over framing — there is no limit on the length of run
Supported at purlin/rafter spans greater than 1200mm
Secured adequately with galvanised or stainless-steel staples, clouts or purlin screws at maximum 600mm centres
Always laid with grey printed surface facing outwards and pulled taut under the cladding to prevent ponding of condensation
Taped along seams with DuPont Tyvek tape when run vertically at roof pitches between 3° and 10°. Alternatively use DuPont Tyvek Supro Plus
Were installed as an air barrier, tape/seal overlaps, end laps, discontinuities and penetrations
Sealed around penetrations to prevent water ingress into the roof or wall cavity
Use DuPont Tyvek tape to repair if ripped or torn
Discontinuous over the ridge where allowance for ridge venting is required
Not permitted to be exposed to the elements after final cladding
Finished 20-25mm beyond the valley or gutter edge, ensuring draining to the envelope exterior
Installed over gutter-flashing where there is likelihood of water ingress beyond gutter into the wall cavity
DuPont Tyvek Pro Plus is suitable for use behind absorbent and non-absorbent wall cladding, direct fixed or with vented cavity.
If installed over LOSP treated timber, ensure that timber is dry and solvent free.
Ensure that the building envelope design and construction adhere to sound condensation management principles, minimising moisture ingress and maximising drying capabilities of wall and roof cavities. See AS 4200.2:2017 Appendix C, NZ Metal Roof and Cladding Code of Practice or ABCB Condensation in Buildings Handbook.
Limitations on Use
DuPont Tyvek Pro must not be:
Used as a vapour barrier
Installed horizontally on purlins spacings greater than 1350mm for 150mm laps
Installed on roofs pitches less than 3°
Do not expose the roof underlay for longer than necessary and no more than 120 days.
Store DuPont Tyvek Proiout of direct sunlight, in a clean dry environment, sheltered from the weather.
Do not install DuPont Tyvek Pro under translucent cladding or skylights.
Specific Design Wind Zone
Very High Wind Zone
Statement of Building Code Compliance
DuPont Tyvek Pro, when installed in accordance with the recommended guidelines will meet or contribute to meet the following provisions of NZBC:
NZBC Clause B2: Durability. Meets the requirement of NZBC B2/AS1 Table 1 (Building Wraps/ Roof Underlay).
NZBC Clauses E2: External Moisture. Contributes to meet these requirements for the use as a roof underlay and air barrier
NZBC Clause F2: Hazardous Building Materials. Meets this requirement and will not present a health hazard to people according to F2.3.1
DuPont Tyvek Pro is an Alternative Solution to NZBC E2/ AS1
Installed on roofs in Europe for the past 10 years, newly introduce to New Zealand
Backed by a DuPont warranty
Other Performance Attributes
DuPont Tyvek Supro/Supro Plush as a flammability index of less than 5 according to AS1530.2 and meets the requirements of NZS2295:2006 Amd.