Oriented Strand Board (OSB) with a likely Black Walnut or Mahogany wood threshold
Pinus spp. / Populus spp. (base) and Juglans nigra (trim foreground) • Engineered
Grain Pattern
Non-directional, fragmented, and erratic. Composed of rectangular wood flakes (strands) oriented in cross-oriented layers and compressed. Foreground trim shows medium-fine, straight grain.
Color Description
Variegated mix of straw, tan, and light brown flakes. The foreground trim is a medium to dark chocolate brown with a dull luster, likely indicating a natural walnut or stained hardwood.
Hardness Rating
Varies by composition; generally equivalent to Soft (600-800 lbf) for the board; trim is Hard (~1010 lbf).
Durability Rating
Non-durable; highly susceptible to moisture, edge swelling, and rot if not treated or sealed. Extremely poor insect resistance without chemical additives.
Common Uses
Structural sheathing, subflooring, roof decking, I-joist webs, and temporary site protection.
Geographic Origin
Produced globally; predominantly manufactured in North America and Europe using fast-growing softwoods and aspens.
Market Value & Sustainability
Estimated Market Value
Approximately $0.50 - $1.20 per square foot depending on thickness (7/16" to 23/32"). Not sold by board foot.
Wood Age Estimate
Modern industrial production; the sample appears relatively new with some surface dust and construction residue, likely under 5 years old.
Sustainability Status
High; utilizes small-diameter, fast-growing trees that are often FSC or SFI certified, making it more resource-efficient than plywood.
Workability
Easily cut with circular or table saws. Does not hold screws well in the narrow edges. Sands poorly due to varying strand density. Gives off significant dust and may contain formaldehyde-based resins.
Notable Features
Distinctive 'patchwork' appearance; smells strongly of resins/glue when cut; prone to 'edge flare' when exposed to humidity.
Finish Recommendations
Generally not intended for fine finishing. Can be painted with a high-solids primer or sealed with polyurethane if used decoratively. The foreground trim would take oil or lacquer well.
Identification Confidence
High; the compressed strand structure is the unmistakable hallmark of Oriented Strand Board (OSB).