Description
4x6 Douglas Fir Timber – Surfaced Four Sides (S4S) – #1 Structural, Kiln-Dried
Our S4S Douglas Fir timbers are graded #1 Structural and kiln-dried for improved strength, stability, and performance. The S4S (Surfaced Four Sides) finish provides a clean, planed surface on all four faces of the timber, resulting in a straight, uniform profile with square edges.
This finish is ideal for structural framing, load-bearing applications, and general construction where strength and consistency are essential. It’s also suitable for installations where the timber will be concealed, painted, or further modified on-site.
Size Note: The actual finished size of a 4x6 S4S Douglas Fir timber is 3 1/2" x 5 1/2", with a manufacturing tolerance of ±1/16". This finish does not include sanding or edge easing—corners remain sharp and square, with visible milling marks possible.
Appearance Note: No wood filler or putty is applied, and no surface sanding is performed. Natural grain variation, knots, and minor imperfections consistent with #1 Structural grading may be present.
Availability Note:
If you see the message “The selected product combination is currently unavailable,” please note: this product is available but requires a custom order. Lead time may increase to allow for sourcing and fulfillment. Please contact our sales team for details and current availability.
Custom Finish Option – Smooth Finish (By Quote)
For select products with S4S or S1S2E profiles, Timber Build offers an optional Smooth Finish upgrade—our signature custom preparation that enhances surface quality and makes each board stain- or paint-ready. This Smooth Finish is an exact match to the finish used on our standard Smooth Finish product line.
This premium finish includes detailed surface preparation beyond standard milling: we inspect and repair surface imperfections, apply wood putty where needed, and sand all exposed surfaces to a 100-grit smoothness. Edges remain square unless otherwise specified.
Ideal For: Projects that demand a refined appearance, such as exposed trim, wrapped columns, high-end exterior details, or interior installations where a clean, finished look is required.
How to Order: The Smooth Finish is a custom, made-to-order service available by quote only. To request pricing or place an order, please contact our sales team directly by phone.
