UV Resistance for Weathertightness Systems

Air and water holdout performance of building underlays and flashing tapes per NZS 2295 can be compromised if UV exposure resistance is exceeded during the build process.

CodeMark certified, DuPont Tyvek Weathertightness products are UV-resistant for 120 days and are supported in New Zealand by DuPont, a 200 year old company, and their local partner, Weather Barrier Systems Limited.

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 buildup in roof and wall assemblies
Suitable in NZS 3604 building wind zones up to and including Extra High
DuPont’s butyl flashing products do not require two layers when the window opening is penetrated by fasteners

To learn more about 120 Day UV Protection and/or for free weathertightness design assistance on wall and/or roof assembly design, visit the Weather Barrier Systems website or call
0800 100 532.

Weather Barrier Systems Limited are Partners of DuPont Protection Solutions.

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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