Western Red Cedar (Thuja plicata)

General Characteristics

Western Red Cedar is coniferous softwood native to the Pacific Northwest areas of North America and is a member of the Cypress family. The heartwood is reddish or pinkish brown to dull brown and the sapwood is almost white.

Wood Structure

The wood is generally straight grained and has a uniform but course texture.

Wood Properties

Western Red Cedar is comparatively soft and light in weight. It has low overall strength but when dry, is a dimensionally stable wood. Movement in service is rated as small.

Western Red Cedar is an excellent thermal insulator and has a low conductivity value.

Western Red Cedar has a low flame spread rating and resists the spread of fire.

Because of its low density, Western Red Cedar has excellent acoustical properties.

The durability of Western Red Cedar heartwood is legendary and the heartwood is very decay resistant.

Working Properties

Western Red Cedar works well with both hand tools and machine operations. Although it has a tendency to splinter, it saws and planes well and it takes both stains and paint satisfactorily.

Wood Utilization / Uses

  • Exterior/Interior Trim Boards
  • Exterior/Interior Pattern Stock
  • Paneling/Siding/Shingles
  • Box Columns
  • Extension Jambs/Flat Jambs
  • Millwork

    Summary of Benefits

  • Small Movement in Service – Dimensionally Stable
  • Low Shrinkage Coefficient
  • Light Physical Weight
  • High Insulation Properties
  • Low Thermal Conductivity
  • Easy to Nail, Screw or Staple
  • Easy to Work with All Tools
  • Easy to Handle
  • Easy to Glue, Stain and Paint
  • Heartwood is Very Decay Resistant

    Information Sources

  • USDA Forest Products Laboratory, Madison, Wisconsin
  • Western Red Cedar Lumber Association, Vancouver, BC, Canada
  • USDA Plant Science Department, Davis, California

    Products Offered

    Asia Building Materials offers Clear FJ/EG Western Red Cedar Boards, Bevel Siding and Sidewall Shingles – Unprimed or Primed. Sherwin-Williams SUPERPAINT, an Exterior Alkyd Oil Primer – Cape Cod Gray, is used exclusively on ABM’s Western Red Cedar Products.
    All Western Red Cedar board and sidings are standard 16’ length.


  • Kiln Dried
  • S4S or S1S2E
  • Square Edge
  • FJ and or FJ/EG
  • Exterior Waterproof Glue
  • Exterior Alkyd Oil Primed 4 Sides, Both Ends (optional)
  • 180 Grit Sanded 4 Sides after Priming
  • Standard ALS Widths
  • Fully Reversible

    Standard Product Line

  • 4/4(11/16”) – 1 x 4, 1 x 6, 1 x 8, 1 x 10 and 1 x 12

  • Unprimed
    Factory Primed - Cape Cod Gray
    Bevel Siding

  • Kiln Dried
  • Smooth Face/Re-Sawn Face
  • Eased Edges and Tip
  • FJ or FJ/EG
  • Exterior Waterproof Glue
  • Exterior Alkyd Oil Primed 4 Sides and Both Ends (optional)
  • 180 Grit Sanded 3 Sides after Priming
  • Fully Reversible

    Standard Product Line

  • 1/2 x 6 x 16’ and 1/2 x 8 x 16’
  • 3/4 x 8 x 16’ and 3/4 x 10 x 16’

  • Unprimed
    Factory Primed - Cape Cod Gray
    Sidewall Shingles

  • Kiln Dried
  • Rebutted & Rejointed (R&R)
  • Re-Sawn Both Faces
  • Butt – 0. 45” with 1/8” Tip
  • Widths – 4”, 5”, 6” , 7”, 8”, 9”, 10” and 14”
  • 50% - 8” and Wider
  • Solid or EG (NO FJ)
  • Exterior Waterproof Glue if EG
  • Exterior Alkyd Oil Primed 4 Sides, Butt and Tip (Optional)
  • Cardboard Box with Handles
  • Fully Reversible

    Standard Product Line

  • 18” R&R – Recommended Sidewall Exposure = 7”

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