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SmartCore® Exterior Siding

SmartCore® Premium 303 Plywood Siding is ideal for exterior applications in residential and nonresidential construction, new construction, remodeling, and industrial.


Exterior walls in home construction and utility buildings. Available Forest Stewardship Council® (FSC®) certified on request.

  • Southern pine with premium rough-sawn or scratch-sanded facing
  • 19/32 in. with 4” or 8” OC T1-11 or 12” OC RBB groove patterns with ship-lap edges
  • 11/32 in. with 4” or 8” OC shallow groove pattern & ship-lap edges
  • 11/32 in. & 19/32 in. no-groove pattern with square edges or ship-lap edges
  • Self-spacing ship-lap edges


Available Sizes:

4’ X 8’ (width x length), nominal

Building Code Performance Categories, Panel Thicknesses*:

11/32 CAT, 0.328 IN. (8.33 mm)

19/32 CAT, 0.578 IN. (14.68 mm)

Length/Width Tolerance: Length +0”, -1/16”; Width +0”, -1/16”
Straightness Tolerance: Within 1/16”
Squareness Tolerance: Within 1/8”
Primary Species: Southern yellow pine
Surface Treatments: Rough-sawn, scratch-sanded, grooved, no groove, square edges or ship-lap edges
Testing Agency: APA® - The Engineered Wood Association (mill number 473)
Classifications: Exterior- Plywood suitable for repeated wetting and redrying or long-term exposure to weather and other conditions of severity.
Code Fire Classifications: Class III or C
Flame Spread Rating: 76-200; ASTM E 84
Building Code Compliance: PS1 PRP108