Description

SOLITEX EXTASANA® Wall Underlay is a flexible and absorbent synthetic wall underlay for use under direct fixed and cavity wall cladding on timber and steel-framed buildings.

Scope

Flexible Wall Underlay

SOLITEX EXTASANA® Wall Underlay has been appraised for use as a flexible wall underlay for timber and steel-framed 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 direct fixed absorbent and non-absorbent wall claddings; or,
• with absorbent and non-absorbent 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 to NASH Building Envelope Solutions for steel-framed buildings; and,
• situated in NZS 3604 and NASH Standard Part Two Wind Zones up to, and including, Very High.

Use over Rigid Wall Underlay

SOLITEX EXTASANA® Wall Underlay has also been appraised for use as a flexible wall underlay over rigid wall underlays on timber and steel-framed 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 absorbent and non-absorbent wall claddings installed over an 18 mm minimum drained cavity; and,
• with masonry veneer in accordance with NZBC Acceptable Solution E2/AS1 for timber framed buildings or to NASH Building Envelope Solutions for steel-framed buildings; and,
• situated in NZS 3604 and NASH Standard Part Two Wind Zones up to, and including, Extra High.

Specific Design

SOLITEX EXTASANA® Wall 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 SOLITEX EXTASANA® Wall Underlay into their design in accordance with the declared properties and the instructions of Pro Clima (NZ) Ltd.

Proprietary Rigid Wall Underlays and Construction Systems

For proprietary rigid wall underlays and construction systems, the system proprietor is responsible for confirming the suitability of SOLITEX EXTASANA® Wall Underlay with their system. The properties described in this Appraisal may be used to confirm the suitability. Designers are responsible for confirming of suitability of SOLITEX EXTASANA® Wall Underlay for their specific building design when used on these proprietary systems.

Note: The use of SOLITEX EXTASANA® Wall Underlay with proprietary wall underlay or construction systems has not been assessed by BRANZ and is therefore outside the scope of this Appraisal.