Spalted Maple
Acer saccharum (Sugar Maple) or Acer rubrum (Red Maple) • Hardwood
Grain Pattern
Generally straight with fine, even texture; exhibits significant spalting figure characterized by dark, irregular zones/lines and mottled discoloration caused by fungal colonization.
Color Description
Creamy white to light reddish brown background; spalting introduces grey, black, and bluish streaks. Over time, the light areas can develop a golden amber patina while the dark zones remain distinct.
Hardness Rating
950 to 1,450 lbf (Medium to Hard classification, depending on specific species and extent of decay)
Durability Rating
Non-durable; susceptible to rot and insect attack if not dried and finished. The spalting process itself is a form of early-stage decay.
Common Uses
Turning (bowls, platters), high-end furniture, decorative veneers, musical instrument components (guitar tops), and specialty craft items.
Geographic Origin
Northeastern North America and the Great Lakes region.
Market Value & Sustainability
Estimated Market Value
Ranges from $8.00 to $15.00 per board foot depending on the intensity of the figure and board thickness.
Wood Age Estimate
The board appears freshly milled or recently sanded based on the lack of deep oxidation; however, the spalting indicates the log sat in a damp environment for 1-3 years prior to processing.
Sustainability Status
Highly sustainable; Maple is abundant and not CITES listed. Often available with FSC certification.
Workability
Fairly easy to work, but the spalted 'punky' areas (softer decay spots) can be prone to tearout; requires sharp tools and sometimes a wood stabilizer/hardener for the softest zones.
Notable Features
Features distinct 'zone lines' created by fungi. Fine dust from spalted wood can be a respiratory irritant or allergen; proper PPE is highly recommended.
Finish Recommendations
Best suited for clear finishes like wipe-on poly, lacquer, or drying oils (Tung/Linseed) to highlight the high-contrast spalting lines without obscuring them.
Identification Confidence
High; the characteristic black zone lines and diffuse-porous grain structure are diagnostic for spalted maple.