Bayonet BayoWrap Roof 02 Underlay
- Abbreviation
- Appraisal number 1263 (2024)
- Valid from
- 30/04/2024
- Information provider
- BRANZ Limited,
- Author
- Building Research Association New Zealand (BRANZ)
- Information type
- BRANZ Appraisal,
- Format
- PDF,
Description
Bayonet BayoWrap Roof 02 Underlay is a synthetic building underlay for use under roof claddings.
The product consists of a micro-porous water-resistant film laminated between two layers of non-woven spun-bonded polyolefin.
Scope
Bayonet BayoWrap Roof 02 Underlay has been appraised for use as a self-supporting roof underlay on buildings within the following scope:
- the scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1 for timber-framed buildings; or,
- the scope limitations of NASH Building Envelope Solutions, Paragraph 1.1 for steel-framed buildings; and,
- with masonry tile roof cladding; and,
- with metal tile roof cladding; and,
- with profiled metal roof cladding; and,
- situated in NZS 3604 and NASH Standard Part 2 Wind Zones up to, and including, Extra High.
Specific Design
Bayonet BayoWrap Roof 02 Underlay has also been appraised for use on buildings subject to specific weathertightness design. Building designers are responsible for the building design and for the incorporation of Bayonet BayoWrap Roof 02 Underlay into their design in accordance with the declared properties and the instructions of Bayonet.