UV Resistant Building Underlays Accommodate Construction Delays

Air and water holdout performance characteristics of building underlays and flashing tapes per NZS 2295 can be compromised if UV exposure rates are exceeded during the build process. Council inspectors have recently become extra vigilant of this performance requirement and may require re-wrapping the building to ensure long term weathertightness. This inconvenience can cause production delays and project cost over–runs.

DuPont Tyvek Wall and Roof Underlays, together with DuPont Window and Door Flashing Tapes are not only UV resistant, they are also CodeMark certified to ensure compliance with NZBC E2/AS1. These DuPont products belong to the compatible, DuPont Tyvek building envelope system. This system is supported in New Zealand by DuPont, a 200 year old company.

Benefits of DuPont Tyvek Building Underlays include:

UV resistant for up to 120 days to allow plenty of time for cladding to be installed
Fire Retardant per AS 1530 Part 2
High Moisture Vapour Transmission Rate per ASTM E-96 which helps moisture escape in a vapour state and helps reduce condensation build up in roof and wall assemblies
Suitable in NZS 3604 building wind zones up to and including extra high for DuPont Tyvek Supro Building Wrap

DuPont Flashing Tape

Tyvek

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DuPont Flashing Tape is window flashing tape, using a 100% butyl self adhesive.

Declare LBC Red List Free

Homestar / Green Star

For a risk score between 0-20 in accordance with NZBC Acceptable solution E2/AS1, Table 2
Building Wind Zones up to and including Very High NZS3604:1999, Extra High if used over a Rigid Air Barrier
To seal around windows, doors and other wall penetrations as a secondary defence against water penetration
It is compatible with timber and steel framed buildings
It is compatible with most construction materials including concrete, wood, steel and synthetic wall underlays
Can be used in Rigid Air Barrier applications on ply and fibre cement substrates

DuPont Flashing Tape 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 B2.3.1 a) 50 years b) 15 years
NZBC Clause E2: External Moisture. Contributes to meet these requirements
NZBC Clause F2: Hazardous Building Materials. Meets this requirement and will not present a health hazard to people

DuPont Flashing Tape meet the requirements of Acceptable Solution to NZBC E2, and has a CodeMark Product Certification.

CodeMark

DuPont FlexWrap NF Flashing Tape

Tyvek

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DuPont FlexWrap NF is a one piece, flexible flashing tape, with an 100% butyl self adhesive.

Declare LBC Red List Free

Homestar / Green Star

For a risk score between 0-20 in accordance with NZBC Acceptable solution E2/AS1
Building Wind Zones up to and including Very High NZS3604:1999, Extra High if used over Rigid Air Barrier
To seal around windows, doors and other wall penetrations as a secondary defence against water penetration
It is compatible with timber and steel framed buildings
It is compatible with most construction materials including concrete, wood, steel and synthetic wall underlays
Can be used in Rigid Air Barrier applications on ply and fibrecement substrates

DuPont FlexWrap NF 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 B2.3.1 a) 50 years b) 15 years
NZBC Clause E2: External Moisture. Contributes to meet these requirements
NZBC Clause F2: Hazardous Building Materials. Meets this requirement and will not present a health hazard to people

DuPont FlexWrap NF meet the requirements of Acceptable Solution to NZBC E2, and has a CodeMark Product Certification.

CodeMark

DuPont Tyvek HomeWrap Wall Underlay

Tyvek

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DuPont Tyvek HomeWrap is a breathable, fire retardant, synthetic wall underlay.

Cavity:
- All cladding types with both timber and steel framing
- Rigid Air Barriers, (over-sheathed)
Direct fixed:
- With absorbent claddings such as timber, polyymeric cladding, plywood, gypsum fibre cement, brick wood, and stucco plaster on timber framing, or over thermal break on steel framing
- Rigid Air Barriers, (over-sheathed)

All cladding types with both timber and steel framing
Rigid Air Barriers, (over-sheathed)

With absorbent claddings such as timber, polyymeric cladding, plywood, gypsum fibre cement, brick wood, and stucco plaster on timber framing, or over thermal break on steel framing
Rigid Air Barriers, (over-sheathed)

DuPont Tyvek HomeWrap Wall Underlay:

Can be installed in all Wind Zones up to and including Very High, or Extra High if over a rigid air barrier
A non-directional wall underlay meaning the wrap can be installed upside down or inside out and performance will not be compromised
Resistant to most surfactants meaning it is suitable for use behind Cedar Cladding (endorsed by the Western Red Cedar Association)
Can be used in all New Zealand climate zones
Can be used in all seismic and corrosion zones

As per CodeMark Certification, DuPont Tyvek HomeWrap, 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 B2.3.1 a) 50 years and b) 15 years
NZBC Clause E2: External Moisture. Contributes to meet these requirements
NZBC Clause F2: Hazardous Building Materials. Meets this requirement and will not present a health hazard to people

DuPont Tyvek HomeWrap is an Acceptable Solution to NZBC E2/AS1

CodeMark

DuPont Tyvek Metal Roof Underlay

Tyvek

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DuPont Tyvek Metal is a breathable, self supporting synthetic roof underlay.

Building wind zones up to and including Extra High.

Recommended for standing seam or low profile roof cladding applications in skillion roof type constructions or any application where extra ventilation is required.

It is recommended for use as a self supporting roof underlay (R2) on roof pitches greater than 3º.

Suitable for the following roof applications:

Direct fixing on all roof cladding types including concrete and clay tiles, profiled metal and pressed metal tiles
Roofs using plywood or other rigid air barrier type solid substrate under the cladding

The use of DuPont Tyvek Metal is considered an alternative solution complying with NZBC Clause E2.

DuPont Tyvek Metal, 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 Clause E2: External Moisture. Contributes to meet these requirements for 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.

CodeMark

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