The Marshall Weatherization System has been appraised for use on buildings within the following scope:

• Constructed with timber framing in accordance with the scope limitations of NZBC Acceptable Solution E2/AS1 or, constructed with steel framing subject to specific engineering design, with the building height and floor plan area in accordance with scope limitations of NZBC Acceptable Solution E2/AS1; and,
• with absorbent wall claddings directly fixed to frame complying with NZBC Acceptable Solution E2/AS1 or covered by a valid BRANZ Appraisal that specifies a flexible wall underlay and a flexible flashing system; or,
• with absorbent and non-absorbent wall claddings installed over an 18 mm minimum drained cavity complying with NZBC Acceptable Solution E2/AS1 or covered by a valid BRANZ Appraisal that specifies a flexible wall underlay or a rigid wall underlay with flexible underlay over and flexible flashing system; or,
• with masonry veneer in accordance with NZBC Acceptable Solution E2/AS1 for timber framed buildings or specific design for steel framed buildings; and,
• situated in NZS 3604 Wind Zones up to and including 'Very High' where the flexible wall underlay is directly fixed to the frame, and up to and including 'Extra High' where the underlay is used over rigid wall underlays

See BRANZ Appraisal 621 for full information

No special conditions or limitations. Refer to the Appraisal for general requirements.

In the opinion of BRANZ, the Marshall Weatherization System if designed, used, installed and maintained in accordance with the statements and conditions of this Appraisal, will meet, or contribute to meeting the following provisions of the NZBC:

• Clause B2 Durability: Performance B2.3.1 (a) not less than 50 years, B2.3.1 (b) 15 years and B2.3.2. The Marshall Weatherization System meets this requirement.
• Clause E2 External Moisture: Performance E2.3.2. The Marshall Weatherization System contributes to exterior walls meeting this requirement.
• Clause F2 Hazardous Building Materials: Performance F2.3.1. The Marshall Weatherization System meets this requirement and will not present a health hazard to people. This is an Appraisal of an Alternative Solution in terms of New Zealand Building Code compliance.