Untreated Douglas fir

Low-risk house conditions

is a standalone, single household unit of no more than two storeys (as defined in NZS 3604), that is designed and constructed to NZS 3604

AND

is situated in wind zones no greater than ‘high’ as defined in NZS 3604

AND

has a building envelope complexity no greater than ‘medium risk’, and a deck design no greater than ‘low risk’, as defined by the risk matrix in the Acceptable Solution E2/AS1

AND

has drained and vented cavities complying with E2/AS1, behind all claddings

AND

uses roof and wall cladding systems and details meeting E2/AS1

AND

has a risk matrix score of no more than 6 on any external wall face, as defined in E2/AS1

AND

has a simple pitched roof with hips, valleys, gables, or mono pitches, all draining directly to external gutters*

AND

has a roof slope of 10° or more

AND

if it has a skillion roof, the roofing material is corrugated iron or concrete, metal or clay tiles for adequate ventilation

AND

has eaves 450mm-wide or more for single-storey houses, and eaves 600mm-wide or more for two-storey houses.