High Performing Dupont Tyvek System Protects Enclo

Choosing DuPont Tyvek on a 28 unit housing development in St Heliers was easy for PHI Construction.

Steve Palmer, of PHI Construction said, "We wanted to choose a building wrap on both the wall and roof that has good breathability and can also handle the New Zealand weather and job site conditions."

"I am a strong believer in building science. Building underlays that are air and water tight but vapour permeable make a lot of sense with today's modern homes," said Steve. "We don't know exactly how people will live in their home, however we do know the high breathability of DuPont Tyvek will allow any vapour within the building to escape to the outside."

DuPont has a compatible system of wall and roof underlays that are complemented with underlay seam and window flashing tapes. On the St Heliers project the following DuPont products were used:

Roof: DuPont Tyvek Supro
Wall: DuPont Tyvek HomeWrap and DuPont Tyvek Contractor Tape
Window and Door Openings: DuPont Flashing Tape

DuPont Tyvek Supro roof underlay is a self-supporting, fire retardant, synthetic roof underlay that is compatible with most residential and commercial roofs down to a 3º pitch. Roof claddings such as metal (including long run), concrete tile, asphalt shingle and slate tile (pictured) are a great fit for DuPont Tyvek Supro.

DuPont Tyvek HomeWrap wall underlay is the most installed building wrap in the world. It is compatible with most wall claddings in cavity and direct fix applications. Like Supro on the roof, DuPont Tyvek HomeWrap can be exposed to UV for up to 120 days. This gives the contractor extra time if there are construction delays due to weather, labour shortage or problems with sourcing cladding materials.

DuPont Tyvek Contractor Tape is an acrylic seam tape engineered by DuPont to seal overlaps in the DuPont Tyvek building underlay. This helps maximise resistance to air and water infiltration. The tape also provides an easy way to repair any tears in the underlay that may occur during the construction process.

DuPont Tyvek Flashing Tape is a 100% butyl peel and stick adhesive tape specifically designed to stick to DuPont Tyvek when flashing windows and doors. DuPont Tyvek Flashing Tape is compatible with most other building materials, including treated timber, metal, vinyl and concrete. It can stick down to -5ºC and is also UV resistant for up to 120 days.

DuPont is a company most people know and trust. When it comes to building underlays, DuPont is a world leader.

All products that make up the DuPont Tyvek Weatherization System are CodeMark certified, and are manufactured and supported in New Zealand by DuPont, a 212 year old company.

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 Tyvek Contractor Tape

Tyvek

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DuPont Tyvek Contractor Tape is a key component of the DuPont Tyvek Weatherization System.

DuPont Tyvek Weatherization System
Can be installed in all wind zones including Extra High

Used in North America and Europe for over 20 years. In New Zealand for over 10 years.

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

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