Description

Ventia Iron Black Self Adhesive Wall Underlay is a self-adhesive, synthetic underlay for use over rigid wall underlays under cavity or direct-fixed wall claddings.

Scope

Use over NZBC E2/AS1 or NASH Building Envelope Solutions Rigid Wall Underlays

Ventia Iron Black Self Adhesive Wall Underlay has been appraised for use as a flexible wall underlay when installed over fibre cement or plywood rigid wall underlays in accordance with NZBC Acceptable Solution E2/AS1 or NASH Building Envelope Solutions, Paragraph 9.1.7.2 and when used 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 a risk score of 0-20, calculated in accordance with NZBC Acceptable Solution E2/AS1 or NASH Building Envelope Solutions, Table 2; and,
• with absorbent and non-absorbent direct fix wall claddings or wall claddings installed over an 18 mm minimum drained cavity; or,
• with masonry veneer in accordance with NZBC Acceptable Solution E2/AS1 for timber-framed buildings or NASH Building Envelope Solutions for steel-framed buildings; and,
• situated in NZS 3604 Wind Zones up to, and including, Extra High.

Specific Design

Designers are responsible for confirming the suitability of Ventia Iron Black Self Adhesive Wall Underlay for their specific design when used on other construction types or buildings outside the scope of this Appraisal.

Note: These have not been assessed and are outside the scope of this Appraisal