Rimboard carries the load

Rimboard® is a precision-engineered wood product designed for use as a perimeter board for floor and roof joists in residential and light commercial construction. For West Fraser flooring systems that lay flat, experienced builders trust West Fraser’s Rimboard. Together the I-joists and Rimboard carry the load. For a durable floor that installs quickly, you need the dimensional consistency, strength and structural reliability of West Fraser’s APA performance-rated Rimboard.


  • Resists twisting, cupping, cracking and warping
  • Available in depths of 9 1/2″, 11 7/8″, 14″, 16″
  • Available in 1″, 1-1/4″ and 1-1/8″ thicknesses
  • 12′ lengths offer easy handling and installation
  • Each board is edge-coated and the units are paper-wrapped for protection against the elements
  • Units are minor bundled
  • Engineered to have the structural strength to transfer both vertical and lateral loads
  • Smooth, stable nailing surface
  • No core voids and will not delaminate
  • Rimboard has edgewise bending properties and can be used to span openings of 4′ or less
  • Manufactured in accordance with ICC – ES AC124
  • No added urea-formaldehyde resins, CARB exempt
  • APA quality assured
West Fraser quality in engineered flooring
Multipurpose strength for engineered construction
  • Economical alternatives for engineered flooring systems
  • APA Performance-Rated Rimboard for I-joist systems
  • Reliable supply, sustainably sourced
  • West Fraser guaranteed
  • Available in two grades: 1″ Rimboard and enhanced performance 1″ or 1 1/8″ Rimboard Plus


  • APA quality assured
  • CCMC (13221-L)
  • Economical alternatives for engineered flooring systems
  • Strong, stable Rimboard for I-joist systems
  • ICC-ES code-evaluated, APA Quality Assured
  • Approved for use as a Rimboard
  • Cost-competitive, reliable supply, sustainably sourced
  • West Fraser guaranteed


  • APA quality assured
  • CCMC (13143-R)

West Fraser Rimboard and Rimboard Plus products are available with termite-resistant treatment. Some conditions may apply.


Thickness Depth Length
Rimboard 1″, 1 ⅛” 9 ½”, 11⅞”, 14″, 16″, 18″, 20″, 22″, 24″ 12′ or 24′
Rimboard Plus 1 ⅛”, 1 ¼”
0.8E Durastrand Rimboard 1 ¼”
  • Sizes / Lengths:
    12' lengths, and depths of 9-1/2, 11-7/8, 14, 16
  • Thickness:
    1, 1-1/4, 1-1/8
  • Edge Seal Color:
    Rimboard and Rimboard Plus: Turquoise, Durastrand Rimboard: Purple
  • Warranty:
    25 Year Limited Warranty
Have any questions regarding this product?
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  • Product Documents

  • Installation

    A full 1-1/8″ edge surface allows for quick installation with virtually no risk of splitting. Installation of RIMBOARDs requires 8d common or ring-shank nails.*

    1. I-Joist – drive 1 nail into the top flange and 1 into the bottom flange
    2. Plate – toe-nail RIMBOARD at 6″ on centre to wall plates
    3. Floor Deck – space fasteners at 6″ on centre
    4. Ledger – use 1/2 ” lag screws and ensure they completely penetrate RIMBOARD. Please refer to building code requirements for number and placement of lag screws.
    5. Starter Joist – when RIMBOARDs are used as starter joists to maintain the vertical loading, there are several installation options, such as blocking (maximum 24″ o.c.), double up the RIMBOARDs, or place an I-JOIST adjacent to the RIMBOARD. Please consult your designer for the appropriate option and details for your application RIMBOARD is designed to span openings of 4′ or less.
    6. When installing T&G sub-floor on top of Rimboard, refer to APA’s Floor panel T&G Trim Guidelines.

    * A larger nail size may be required by some I-JOIST manufacturers.


    Visit the resources page for more information on product documents, forest certification, APA publications, seminars & trade shows.