5/4x Boards
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Thicker, premium‑grade boards ideal for exterior trim, fascia, and high‑end interior applications.
5/4×10 Board
Nominal 5/4×10 boards in 1 species, every one milled to 1 1/16″ x 9 1/4″. Surfaced and ready to finish. See the board size guide for how nominal and actual sizes compare across the range.
5/4×12 Board
Nominal 5/4×12 boards in 1 species, every one milled to 1 1/16″ x 11 1/4″. Surfaced and ready to finish. See the board size guide for how nominal and actual sizes compare across the range.
5/4×4 Board
Nominal 5/4×4 boards in 4 species. Actual thickness varies by material, running 1″ and 1 1/16″, with a consistent 3 1/2″ width. Choose a species above to see its exact milled size, or read the board size guide if you are unsure how nominal and actual sizes differ.
5/4×6 Board
Nominal 5/4×6 boards in 5 species. Actual thickness varies by material, running 1″ and 1 1/16″, with a consistent 5 1/2″ width. Choose a species above to see its exact milled size, or read the board size guide if you are unsure how nominal and actual sizes differ.
5/4×8 Board
Nominal 5/4×8 boards in 3 species. Actual thickness varies by material, running 1″ and 1 1/16″, with a consistent 7 1/4″ width. Choose a species above to see its exact milled size, or read the board size guide if you are unsure how nominal and actual sizes differ.
WindsorONE 5/4×10 Trim Board
Actual size 1 1/16″ x 9 1/4″. Factory primed finger jointed wood for stair treads, wide caps and bench tops, warranted 30 years against rot and insects. See the board size guide for how this compares with our other boards.
WindsorONE 5/4×12 Trim Board
Actual size 1 1/16″ x 11 1/4″. Factory primed finger jointed wood for deep treads, shelving, bench tops and wide caps, warranted 30 years against rot and insects. See the board size guide for how this compares with our other boards.
WindsorONE 5/4×3 Trim Board
Actual size 1 1/16″ x 2 1/2″. Factory primed finger jointed wood for heavier battens, stair riser trim and narrow caps, warranted 30 years against rot and insects. See the board size guide for how this compares with our other boards.
WindsorONE 5/4×4 Trim Board
Actual size 1 1/16″ x 3 1/2″. Factory primed finger jointed wood for substantial casing, rail caps and porch trim, warranted 30 years against rot and insects. See the board size guide for how this compares with our other boards.
WindsorONE 5/4×5 Trim Board
Actual size 1 1/16″ x 4 1/2″. Factory primed finger jointed wood for wider caps, transitional casing and one off details, warranted 30 years against rot and insects. See the board size guide for how this compares with our other boards.
WindsorONE 5/4×6 Trim Board
Actual size 1 1/16″ x 5 1/2″. Factory primed finger jointed wood for window stools, rail caps, water table and bench tops, warranted 30 years against rot and insects. See the board size guide for how this compares with our other boards.
WindsorONE 5/4×8 Trim Board
Actual size 1 1/16″ x 7 1/4″. Factory primed finger jointed wood for deep stools, deck skirts, caps and bench seats, warranted 30 years against rot and insects. See the board size guide for how this compares with our other boards.
Our 5/4 Boards offer added thickness and stability for projects that require a more substantial profile. Available in Pine, Radiata, Hardwoods, Softwoods and select WindsorONE options, these boards are precision‑milled for smooth surfaces and consistent dimensions. Perfect for exterior trim, fascia, porch ceilings, and premium interior details. Actual sizes vary by material and are listed on each product page.