Oregon (pseudotsuga spp.) or Douglas fir, is native to eastern America, from Mexico to British Columbia. There, it is one of the most important commercial softwoods. The species originated in North America, however, it was introduced into New Zealand in the 1800's.
In New Zealand, the species is grown throughout the country, with the major forests being located in the central North Island, Nelson, and Tapanui areas. Mature virgin forest Oregon is classed as durable; however, the plantation product, if exposed to the weather, must be adequately waterproofed and maintained.
The easy workability and high strength-to-weight ratio of Douglas fir complement its structural strength to provide builders with an ideal general purpose wood for all phases of residential or light commercial timber frame construction. Douglas fir is stable in use, holds nails and screws securely, readily accepts glues, and is boldly attractive when left exposed to view in applications such as post and beam construction.
The hardness, texture and attractive colouration of Douglas fir rival those of many hardwoods commonly used in the manufacture of windows, doors, roller blinds, mouldings, ceilings, furniture and interior trim. The wood is easy to dry, particularly in clear grades and exhibits little tendency to check, warp, cup, twist, or split.
Applications and Uses:
Green Douglas Fir is used for the manufacture of residential roof trusses, wall frame, exposed beams and rafters. Kiln dried Douglas Fir can be used for interior panelling and joinery.