New Zealand Douglas Fir is a plantation tree that was originally native to North America, Douglas Fir or Oregon as it is commonly known has been used extensively in Australia for building construction in both interior and exterior structural applications. Where it is used in the exterior particular attention is required to correct detailing and coating and ongoing preventative maintenance is required to ensure satisfactory performance. In critical exterior applications we would recommend a high durability hardwood or a preservative treated product.

New Zealand Douglas fir is usually supplied green (unseasoned) as it has a relatively low shrinkage factor. But is now being Kiln Dried as also. It is also usually rougher headed or dressed four sides, for a consistent finished size. It is suitable for bearers, floor joists, rafters, under purlins, studs, plates and even exposed rafters. It is also used for concrete formwork and scaffold planks.

DOUGLAS FIR ROUGHER HEADED or DRESSED $ SIDES

Note the called size is the nominal sawn size, the actual measured size of the timber in Green is less 3mm on width and less 3mm on height of the called size. i.e. 100 x 50 is finished 97x47, on KILN DRIED it is 10mm less on width and 5mm less on thickness i.e. 200 x 50 is finished 190 x 45

Douglas Fir	Red Stag Douglas Fir