Untreated douglas-fir okay
well as treated options,’’ Mr Karalus says.
‘‘The decision . . . validates the Douglasfir Association’s campaign to establish that untreated douglas-fir is fit for purpose in buildings that are being designed with a focus on weathertightness.
‘‘Untreated douglas-fir has been used successfully in New Zealand construction for more than 50 years, and extensively throughout the world as a strong and reliable framing timber for residential and commercial construction.’’
The Douglas-fir Association represents growers and processors of douglas-fir in the South Island, where more than 70 percent of the country’s 112,000ha of douglas-fir is grown.
The new rules take effect on April 4 and are set to be fully phased in by July 1.
Framed: New timber treatment standards endorse the use of untreated douglas-fir in timber-framed homes New timber treatment standards, just announced, simplify the rules and endorse the use of untreated douglas-fir in timber-framed homes, Douglas-fir Association manager Andy Karalus says.
Minister of Building and Construction Maurice Williamson released the new streamlined requirements after the Department of Building and Housing considered scientific evidence that confirmed the superior natural durability of douglas-fir for use in residential houses.
‘‘Strength, stability and rigidity are vital requirements of superior construction timber. In each of these areas, douglas-fir stands out as a top performer. It has natural moisture resistance and offers consumers an untreated ‘natural’ building option as