Why Species Identification Matters
Reclaimed lumber rarely arrives with labels. Knowing what species you are working with affects everything: structural capacity, finishing behavior, rot resistance, workability, and value. A board sold as "reclaimed softwood" could be Douglas Fir worth $7/BF or Hemlock worth $4/BF — and they behave very differently under a saw.
At GreenBoard, our graders identify every board by species before it enters inventory. Here are the techniques they use, adapted for anyone working with reclaimed wood.
Douglas Fir
Color: Light tan to warm reddish-brown, darkening with age to amber. Grain: Straight with pronounced growth rings visible as alternating light and dark bands. Weight: Moderate to heavy (32 lb/ft³). Smell: Mild, slightly resinous when freshly cut. Key identifier: The dramatic contrast between earlywood and latewood bands is the hallmark of Douglas Fir. Old-growth specimens have very tight, closely spaced rings.
Heart Pine (Southern Yellow Pine)
Color: Rich amber to deep reddish-orange — dramatically darker and more saturated than Douglas Fir. Grain: Tight, with high resin content that makes the wood feel slightly waxy. Weight: Heavy (36 lb/ft³). Smell: Strong resinous/piney aroma, especially when cut. Key identifier: The deep orange color and heavy feel are unmistakable. Heart Pine is also notably harder than other softwoods — you can feel the difference when you tap it.
White Oak vs Red Oak
White Oak: Light to medium brown with olive undertones. Pores are plugged with tyloses (visible under magnification), making it water-tight. Medullary rays create dramatic figure in quarter-sawn cuts. Heavy at 47 lb/ft³.
Red Oak: Pinkish-red to light brown. Pores are open (no tyloses) — if you blow through the end grain of Red Oak, air passes through. Cathedral-pattern grain. Slightly lighter at 44 lb/ft³. The water test is the easiest field distinction: place a drop of water on the end grain. Red Oak absorbs it quickly; White Oak repels it.
Cedar, Hemlock, and Spruce
Western Red Cedar: Reddish-brown to silver-gray when weathered. Very lightweight (23 lb/ft³) — noticeably lighter than Fir. Aromatic — the distinctive cedar smell is the easiest identifier. Naturally rot-resistant.
Hemlock: Light yellowish-brown with a purplish tinge. Moderately lightweight (29 lb/ft³). Non-resinous with a bland smell. Tends to splinter more than Fir when worked.
Spruce: Pale cream to light yellow. Lightweight (28 lb/ft³). Even, fine texture with minimal grain contrast. Similar to Hemlock but lighter in color and slightly softer.