Description

1. Ventia Iron Roof Underlay is a synthetic building underlay for use under roof claddings. The product consists of a micro-porous water-resistant polypropylene film laminated between two layers of spun-bonded polypropylene and is coloured grey.

2. Ventia Metal Roof Underlay comprises a polymer drainage mat adhered to the Ventia Iron Roof Underlay for use under profiled metal roof cladding.

Scope

1. Ventia Iron Roof Underlay has been appraised for use as a roof underlay on buildings within the following scope:

• the scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1 with regard to building height and floor plan area; and,
• with masonry tile roof cladding; and,
• with metal tile roof cladding; and,
• with profiled metal roof cladding; and,
• situated in NZS 3604 Building Wind Zones up to, and including, Extra High.

2. Ventia Metal Roof Underlay has been appraised for use as a roof underlay on buildings within the following scope:

• the scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1 with regard to building height and floor plan area; and,
• with profiled metal roof cladding; and,
• situated in NZS 3604 Building Wind Zones up to, and including, Extra High.