Pressure-Treated Southern Yellow Pine
Pinus spp. (e.g., Pinus taeda, Pinus echinata) • Softwood
Grain Pattern
Straight, coarse grain with wide, prominent latewood bands (growth rings). Flat-sawn orientation is evident in the visible checking on the treads.
Color Description
Weathered silver-gray patina over originally pale yellowish-brown heartwood. Visible lichen growth and green chemical oxidation from copper-based preservatives.
Hardness Rating
690 lbf (Soft)
Durability Rating
Highly Durable when treated; the chemical impregnation provides high resistance to rot, fungal decay, and termites.
Common Uses
Decking, outdoor stairs, framing, dock construction, fence posts, and exterior landscaping.
Geographic Origin
Southeastern United States
Market Value & Sustainability
Estimated Market Value
$1.00 - $2.50 per board foot (standard dimensional lumber pricing)
Wood Age Estimate
15 to 25 years based on extensive silvery graying, deep surface checking, lichen growth, and rounded edges from wear.
Sustainability Status
Least Concern (IUCN); highly sustainable due to fast growth and widespread managed plantations; FSC and SFI certified sources common.
Workability
Easy to work with power tools; can be prone to splintering and provides moderate resistance to nails/screws if not pre-drilled. Chemical treatment can be corrosive to standard fasteners.
Notable Features
Contains chemical preservatives (likely MCA or ACQ), high resin content, strong pine scent when cut, and hazardous dust requiring respiratory protection.
Finish Recommendations
Deep-penetrating oil-based exterior stain or solid deck sealer after thorough cleaning and sanding to remove oxidized gray wood fibers.
Identification Confidence
High; the wide latewood growth rings, specific checking patterns on the end grain, and application as outdoor stair treads are diagnostic for Southern Yellow Pine.