S4S (Surfaced 4 Sides) lumber has been milled flat and square on all four faces - two broad faces and both edges. This processing gives you material that's ready to work with, whether you're building furniture, installing trim, or constructing cabinets.

Why Choose S4S?

Rough lumber is less expensive, but it requires milling before use. S4S material saves you time and equipment wear - it arrives flat, square, and at a consistent thickness. For small shops or job sites without jointers and planers, S4S is the practical choice.

Our S4S Process

We start with select rough lumber and process it through our jointer and planer to achieve:

• Flat faces: No twist, cup, or bow
• Square edges: 90° to the faces for easy joinery
• Consistent thickness: Within .005" tolerance
• Smooth surface: Ready for sanding or finishing

Available S4S Stock

We maintain a selection of popular domestic species in S4S form: red oak, white oak, hard maple, soft maple, cherry, walnut, and poplar. Common sizes include 1x4, 1x6, 1x8, 2x4, and 2x6 in various lengths.

Custom S4S Service

Don't see what you need? We can surface your lumber selection to S4S specifications. Choose boards from our rough stock, specify your final dimensions, and we'll have them ready for pickup or logistics.