DuPont™ Tyvek® Metal Roof Underlay
- Valid from
- Information provider
- Ministry of Business, Innovation and Employment
- CertMark International New Zealand
- Information type
- Product Certificate (CodeMark)
DuPont™ Tyvek® Metal Roof Underlays are a synthetic building underlay for use under roof claddings. The product is a spun bonded high density polyethylene, laminated to a non-woven polypropylene sheet.
The product is coloured grey on the top face and white on the bottom face.
This product is for use under roof claddings on timber-framed and steel-framed buildings to limit wind entry and assist with moisture management.
To meet durability requirements DuPont™ Tyvek® Metal Roof Underlays must only be installed on roof pitches > 3o and in accordance with the DuPont™ Tyvek® Metal Underlay Technical Literature, April 2015 Version 2.
Must be separated from fireplaces, heating appliances, flues and chimneys in accordance with the requirments of NZBC Acceptable Solutions C/AS1 - C/AS6, Paragraph 7.5.9 for the protection of combustible materials.