WindsorONE 1×3 Trim Board

SKU: N/A

Actual size 3/4″ x 2 1/2″. Factory primed finger jointed wood for battens over siding, narrow casing and backing behind brickmould, warranted 30 years against rot and insects. See the board size guide for how this compares with our other boards.

Actual size — nominal 1x3 14 options
SpeciesProfileThicknessWidthCode
MDF 17ft — 11/16" 2 1/2" 1X3MDF
Poplar S4S 13/16" 2 1/2" 1X3POP
FJ Poplar Primed S4S 13/16" 2 1/2" 1X3POPPRIMED
Alder S4S 13/16" 2 1/2" 1X3ALD
Knotty Alder S4S 13/16" 2 1/2" 1X3KALD
Northern Red Oak S4S 13/16" 2 1/2" 1X3NRO
Hard Maple S4S 13/16" 2 1/2" 1X3MPL
White Oak plain sawn S4S 13/16" 2 1/2" 1X3WHITEOAK
WindsorONE Protected S4S 3/4" 2 1/2" 1X3RPS4S
WindsorONE Protected S1S2E 3/4" 2 1/2" 1X3RPS1S2E
Sage FJP S4S 23/32" 2 1/2" 1X3SAGE
Flexible FJP per ft — 3/4" 2 1/2" 1X3FLXFJP
Flexible MDF per ft — 11/16" 2 1/2" 1X3FLXMDF
Flexible per ft S4S 3/4" 2 1/2" 1X3FLXS4S

4 different thicknesses at 1x3: 11/16", 13/16", 3/4", 23/32". Check the species before butting materials together.

Note: Mouldings sold per linear foot (LF) are subject to lengths on hand. If special lengths are required, please contact our stores for an inventory check. Order the total quantity of LF desired and an order equaling that total will be assembled.

Shipping and returns

We offer free next-day delivery on orders over $300 within a 50-mile radius of any of our stores. For orders less than $300 within our radius, we charge a $65 delivery fee. For delivery sites outside of our 50-mile radius, we charge a $250 delivery fee, regardless of the amount purchased. Please click here to view a map of our delivery radius.

Product details

Nominal SizeWOS1 – 1 X 3
Wood SpeciesWood type classification to identify material characteristics.
Board Length16′, 4″ sample, 8′
Edge ProfileShows whether the board edges are square (sharp) or eased (rounded).S1S2E (1 Side Smooth, 2 Edges Eased)S1S2E (1 Side Smooth, 2 Edges Eased)Reversible, 1 rough sawn side, the rest smooth with 2 eased edges., S4S (Smooth 4 Sides)S4S (Smooth 4 Sides)Smooth on all four sides with crisp, square edges.

Description

WindsorONE 1×3 Trim Board

Board and batten lives or dies on the batten, and 1×3 is the width most elevations want. WindsorONE 1×3 measures 3/4″ thick by 2 1/2″ wide, and it is built for battens over siding, narrow casing and backing behind brickmould.

The guarantee is 30 years, which is longer than most people keep a house. Finger jointed real wood, not composite, which means it behaves exactly like solid stock under a saw. Every piece carries three factory coats of acrylic latex.

Pick S4SSE for a smooth finish or S1S2E, which is rough sawn on one face and can be turned whichever way the detail wants.

Any cut exposes bare wood, so seal it before the piece goes up.

The 3/4″ thickness lines up with standard solid stock, unlike our MDF, which runs 11/16″. Compare with 1×3 boards. Should this be the wrong width, WindsorONE 1×2 is the next size down and WindsorONE 1×4 the next size up. Every stocked size sits in the WindsorONE range, and the board size guide explains the numbers.

Space battens off the sheet layout rather than the eye, and the wall will read straight from the street.

WindsorONE is a premium line of trim boards, mouldings, and specialty millwork known for exceptional craftsmanship, architectural accuracy, and consistently smooth finishes. Every board is precision‑milled, primed, and built to deliver long‑lasting performance for interior and exterior applications. Contractors choose WindsorONE for its reliability, crisp profiles, and superior paint adhesion.

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Nominal vs actual size

Why a 1x4 is not four inches wide, and what you will really receive.

Board size guide

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