Technical Statement
Product Description
Scope of use
For roof pitches of 15-60 degrees. Not suited for metal tray or membrane roofs or custom-made flashings
New Zealand Building Code (NZBC)
The product will, if employed in accordance with the supplier's installation and maintenance requirements, assist with meeting the following provisions of the building code:
- Clause B2 Durability: Performance B2.3.1, B2.3.2
Product is CodeMark certified. (BRANZ CM-1010)
- Clause E2 External moisture: Performance E2.3.1, E2.3.2, E2.3.7
Product is CodeMark certified. (BRANZ CM-1010)
- Clause G7 Natural light: Performance G7.3.1, G7.3.2
Product is CodeMark certified. (BRANZ CM-1010)
- Clause H1 Energy efficiency : Performance H1.3.1, H1.3.2E, H1.3.3
Product is CodeMark certified. (BRANZ CM-1010)
Notes
B2/AS1
Durability - AS 4285 - VELUX Skylights satisfy the durability
requirements specified for Non-structural Roof Cladding elements and
External Window/Door Joinery. VELUX Skylights have passed tests for
weather tightness, concentrated load, non-cyclonic and cyclonic wind
pressures according to Australian Skylight Standard AS4285 test methods.
E2
External Moisture - AS 4285 - VELUX Skylights have passed tests for
weather tightness, concentrated load, non-cyclonic and cyclonic wind
pressures according to Australian Skylight Standard AS4285 test methods.
F2
Hazardous Building Materials - NZS 4233: Part 4, AS/NZS 4666 - VELUX
Skylights comply with requirements for sloped Insulating Glass Units.
G7 Natural
Light - VELUX Skylights can be used to meet the G7 Natural Light
requirements.
H1 Energy
Efficiency - NZS 4218 - VELUX Skylights exceed the minimum R-value
requirements for skylights in all climate zones.
Evidence:
Evidence
The product meets the requirements set out in the following documents, or relevant parts of cited standards within the documents:
- B2/AS1 Durability - AS 4285 - VELUX Skylights satisfy the durability requirements specified for Non-structural Roof Cladding elements and External Window/Door Joinery. VELUX Skylights have passed tests for weather tightness, concentrated load, non-cyclonic and cyclonic wind pressures according to Australian Skylight Standard AS4285 test methods.
- E2 External Moisture - AS 4285 - VELUX Skylights have passed tests for weather tightness, concentrated load, non-cyclonic and cyclonic wind pressures according to Australian Skylight Standard AS4285 test methods.
- F2 Hazardous Building Materials - NZS 4233: Part 4, AS/NZS 4666 - VELUX Skylights comply with requirements for sloped Insulating Glass Units.
- G4/AS1 Natural Ventilation (1.2, 2.1) - VELUX Opening Skylights can be used to meet the G4 Natural Ventilation requirements.
- G7 Natural Light - VELUX Skylights can be used to meet the G7 Natural Light requirements.
- H1 Energy Efficiency - NZS 4218 - VELUX Skylights exceed the minimum R-value requirements for skylights in all climate zones.
- Evidence: 30+ years of historical use in New Zealand
Supporting evidence
The product has and can make available the following additional evidence to support the above statements:
Use in Service History
15+ years in New Zealand
Product Criteria
Design requirements
TWR Sun Tunnels are modular fixed, non-venting tubular skylights intended for roof
pitches between 15 and 60 degrees. They are available in 350mm diameter 99% reflective polished aluminium tubes, which can be extended up to 6 metres in length.
The
polyurethane roof unit has 4mm thick toughened glass and an integrated flashing
suitable for corrugated and trapezoid profile metal roofing, metal and
concrete/clay tiles.
TWF
Sun Tunnels do not have a fire rating.
Installation requirements
Install
TWF Sun Tunnel in accordance with instructions supplied with the product and
local building code requirements. 453834-2020-09-TWR_TLR.indd (azureedge.net).
Align Sun Tunnel with the trim opening, free of warp or twist, maintaining
dimensional tolerances. Attach skylight to the trim-out frame with screws
furnished by manufacturer. Coordinate attachment and seal of perimeter air and
vapor barrier material. Tape all joints and connections to
ensure there no gaps tape using 'silver' tape provided.
Maintenance requirements
For maintenance requirements refer to http://https//www.velux.co.nz/service-and-warranty/maintenance.
Exterior surfaces must be cleaned with clean water at least once
a year, subject to the environmental conditions present.
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Date last validated:
03 November 2023 |
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Date last updated:
03 November 2023 |