Bois d'œuvre S4S épais

S4S lumber stands for “Surfaced Four Sides,” meaning the wood has been planed and smoothed on all four sides for a straight, consistent, and ready-to-use board. Unlike rough cut lumber, S4S wood requires little to no milling before your project begins.

S4S lumber is pre-milled, smooth, and dimensionally consistent, while rough cut lumber requires additional preparation such as jointing, planing, and ripping before use.

S4S lumber can be used for furniture making, cabinetry, cutting boards, shelving, home décor, trim work, woodworking projects, and DIY builds.

Yes, S4S lumber is often considered project-ready because it has already been surfaced on all four sides.

S4S lumber is available for all the lumber species we carry, giving woodworkers access to a huge variety of domestic and exotic hardwoods.

S4S lumber is available in multiple thicknesses, including thin stock and thicker boards for furniture, cutting boards, and structural woodworking applications. Common options often include 1/4", 1/2", 3/4", and 1-5/8".

No, one of the biggest advantages of S4S lumber is that it has already been surfaced and squared, making it ideal for woodworkers who do not own milling equipment like planers or jointers.

S4S boards are available in a range of widths, lengths, and thicknesses depending on the species and product selection. Many boards are sold in project-friendly sizes for furniture, cutting boards, hobby projects, and woodworking builds. If you need a custom size, reach out to us directly.

S4S lumber saves time, and helps ensure more consistent results because the boards are already straight, flat, and smooth.

Yes, S4S lumber can be stained, painted, oiled, or clear coated depending on the wood species and project goals.