Douglas fir

Latin name: Pseudotsuga menziesii, Pseudotsuga taxifolia, Pseudotsuga douglasii

 

Also known as: British Columbian pine (UK), Columbian pine (UK), Oregon pine (USA)


Wood Type:

Softwood

Durability:

Moderately durable, Slightly durable (Homegrown timber)

Treatability:

Extremely difficult, Difficult (Sapwood)

Moisture Movement:

Small

Density (mean, Kg/m³):

530

Texture:

Medium

Availability:

Readily available at timber merchant

Price:

Medium

Sizes:

Long lengths and clear grades available

Use(s):

Joinery - Exterior, Joinery - Interior, Cladding, Structural use, Flooring

Colour(s):

Reddish brown, Light brown

Notes on terms used navigation-arrow

Introduction

Douglas fir from Canada and the USA may be graded and shipped for structural purposes in the species mix 'Douglas fir- larch' which comprises Douglas fir (Pseudotsuga menziesii) and western larch (Larix occidentalis). The mechanical properties quoted for material from Canada and USA are for this species mix.

 

Environmental

Not listed in CITES. Believed available from well-managed sources. Check certification status with suppliers.

 

Distribution

Although a native of North America, the tree has been extensively planted in Europe and the UK.

 

The tree

A large tree attaining a height of 45m to 60m and a diameter of 1m to 2m, occasionally much taller and larger.

 

The timber

The heartwood is light reddish-brown in colour, usually quite distinct from the lighter coloured sapwood. The abrupt change and contrast in colour between early-wood and late-wood bands, produce a prominent growth ring figure which is a feature of plain-sawn surfaces and of rotary-cut veneer. The wood from trees grown in the UK appears to have less resin than the North American wood, and to some extent is of more rapid growth. The average weight of dried timber from either source is about 530 kg/m3.

 

Drying

Imported 'Douglas fir' is not a difficult timber to dry on arrival in this country or in Europe, because the moisture content has already been reduced prior to shipment with some selecting out of degraded boards. Drying degrade is generally confined to surface checking, splitting and loosening of knots, and splitting in the vicinity of knots. Accordingly, stock from trees grown in the UK and in Europe when dried from the green state, needs care, particularly because of the generally higher preponderance of knots which are hard, often loose, and which encourage more wavy grain than in imported stock.

 

Strength

Compared with European redwood, it is some 60 per cent stiffer, 40 per cent harder and more resistant to suddenly applied loads, and 30 per cent stronger in bending and in compression along the grain.

Suppliers

Abbey Woodsnavigation-arrow

Dublin 13

Beaumont Forest Products Limitednavigation-arrow

High Wycombe

Benchmark Timber Ltdnavigation-arrow

High Wycombe

Brooks Bros (UK) Limitednavigation-arrow

Maldon

Burton, E O & Co Limitednavigation-arrow

Brentwood

Capricorn Eco Timbernavigation-arrow

Stafford

Champion, A W Limitednavigation-arrow

New Malden

Chaunceys Timber Flooringnavigation-arrow

Bristol

Co2 Timber Suppliesnavigation-arrow

Taunton

Cranwood Industriesnavigation-arrow

Warrenpoint

English Woodlands Timber Ltdnavigation-arrow

Midhurst

Harlow Bros Limitednavigation-arrow

Loughborough

International Timbernavigation-arrow

Manchester

iWood Timber Ltdnavigation-arrow

Stafford

James Latham plcnavigation-arrow

Hemel Hempstead

Morgan Timbernavigation-arrow

Rochester

NHG Timber Limitednavigation-arrow

Croydon

PiveteauBoisnavigation-arrow

Essarts en Bocage

Ramsay Timber Limitednavigation-arrow

Wigan

Stourhead (Western) Estatenavigation-arrow

Warminster

Thorogood Timber Limitednavigation-arrow

Colchester

Timber Focusnavigation-arrow

Manchester

Timbersource Limitednavigation-arrow

Waterlip

Vastern Timbernavigation-arrow

Swindon

Vincent Timber Ltdnavigation-arrow

Birmingham

W. L. West & Sons Ltdnavigation-arrow

Petworth

Suppliers

W. L. West & Sons Ltdnavigation-arrow

Petworth

Vincent Timber Ltdnavigation-arrow

Birmingham

Vastern Timbernavigation-arrow

Swindon

Timbersource Limitednavigation-arrow

Waterlip

Timber Focusnavigation-arrow

Manchester

Thorogood Timber Limitednavigation-arrow

Colchester

Stourhead (Western) Estatenavigation-arrow

Warminster

Ramsay Timber Limitednavigation-arrow

Wigan

PiveteauBoisnavigation-arrow

Essarts en Bocage

NHG Timber Limitednavigation-arrow

Croydon

Morgan Timbernavigation-arrow

Rochester

James Latham plcnavigation-arrow

Hemel Hempstead

iWood Timber Ltdnavigation-arrow

Stafford

International Timbernavigation-arrow

Manchester

Harlow Bros Limitednavigation-arrow

Loughborough

English Woodlands Timber Ltdnavigation-arrow

Midhurst

Cranwood Industriesnavigation-arrow

Warrenpoint

Co2 Timber Suppliesnavigation-arrow

Taunton

Chaunceys Timber Flooringnavigation-arrow

Bristol

Champion, A W Limitednavigation-arrow

New Malden

Capricorn Eco Timbernavigation-arrow

Stafford

Burton, E O & Co Limitednavigation-arrow

Brentwood

Brooks Bros (UK) Limitednavigation-arrow

Maldon

Benchmark Timber Ltdnavigation-arrow

High Wycombe

Beaumont Forest Products Limitednavigation-arrow

High Wycombe

Abbey Woodsnavigation-arrow

Dublin 13