Medium Density Fiberboard (MDF)
N/A (Lignocellulosic fiber composite) • Engineered
Grain Pattern
Non-directional fiber composition; no natural growth rings or cellular grain pattern present. Surface is smooth and homogenous with a fine, flecked texture from compressed wood fibers.
Color Description
Uniform tan to light brown throughout the core. No distinction between heartwood or sapwood. Does not significantly change color with age if protected, but can yellow slightly with UV exposure.
Hardness Rating
Approximately 600-900 lbf (Soft to Medium); note that Janka ratings for MDF vary by density grade.
Durability Rating
Non-durable; poor resistance to moisture and rot. Extremely prone to swelling and structural failure if exposed to water or high humidity.
Common Uses
Cabinetry, furniture substrates, internal trim, molding, shelving, speakers, and painted DIY projects.
Geographic Origin
Manufactured globally in industrial facilities; raw materials often sourced from regional softwood or hardwood residuals.
Market Value & Sustainability
Estimated Market Value
$0.80 - $1.50 per square foot (typically sold in 4x8 sheets rather than board feet).
Wood Age Estimate
Modern production, likely less than 5-10 years based on the crisp edge and lack of significant oxidation or water damage.
Sustainability Status
Generally high; often made from recycled wood waste and thinning from managed forests. Low-VOC and formaldehyde-free versions available.
Workability
Excellent for machining and routing as there is no grain to cause tearout. Glues well. Poor screw-holding capacity on edges; requires pre-drilling. Dust is very fine and requires respiratory protection.
Notable Features
Isotropic properties (same strength in all directions on the plane); contains urea-formaldehyde or MDI resins; heavy weight due to high density.
Finish Recommendations
Requires priming (especially edges) to prevent excessive absorption. Best suited for paint or lacquer; not suitable for transparent stains intended for natural wood.
Identification Confidence
High; the characteristic homogenous fiber structure visible on the edge and the uniform tan color are definitive markers of industrial MDF.