A. Wind Zone

• Low - Low wind zone as described by NZS 3604
• Medium - Medium wind zone as described by NZS 3604
• High - High wind zone as described by NZS 3604
• Very High - Very high wind zone as described by NZS 3604

B. Number of storeys

• Low - One storey
• Medium -Two storeys in part
• High - Two storeys
• Very High - More than two storeys

C. Roof/wall intersection design

• Low - Roof-to-wall intersection fully protected (eg, hip and gable intersection design roof with eaves)
• Medium - Roof-to-wall intersection partly exposed (eg, hip and gable roof with no eaves)
• High - Roof-to-wall intersection fully exposed (eg, parapets or eaves at greater than 90o to vertical with soffit lining)
• Very High - Roof elements finishing within the boundaries formed by the exterior walls (eg, lower ends of aprons, chimneys etc)

D. Eaves width

• Low - Greater than 600 mm at first floor level
• Medium - 450-600 mm at first floor, or over 600 mm at second floor level
• High - 100-450 mm at first floor, or 450-600 mm at second floor level
• Very High - 0-100 mm at first floor, or 100-450 mm at second floor level, or 450-600 mm at third floor level

Eaves width measured from external face of wall cladding to outer edge of overhang, including gutters and fascias.
Balustrades and parapets count as 0 mm eaves.

E. Envelope complexity

• Low - Simple rectangular, L, T or boomerang shape, with single cladding type
• Medium -More complex, angular or curved shapes (eg, Y or arrowhead) with single cladding type
• High - Complex, angular or curved shapes (eg, Y or arrowhead) shapes with multiple cladding types
• Very High - As for high risk, but with junctions not covered in C or F of this table (eg, box windows, pergolas, multi-storey re-entrant shapes etc)

F. Deck Design

• Low - None, timber slat deck or porch at ground level
• Medium -Fully covered in plan by roof, or timber slat deck attached at first or second floor level
• High - Enclosed deck exposed in plan or cantilevered at first floor level
• Very High - Enclosed deck exposed in plan or cantilevered at second floor level or above