Professional Grade Lumber
Mainstream Building Supply is your trusted source for structural-grade lumber that meets the rigorous demands of professional contractors. We stock high-performance framing materials and premium treated options designed for longevity and resilience. From heavy-duty structural beams to weather-resistant decking, our inventory is hand-selected for reliability, ensuring your projects stand on a foundation of quality.
Premium Wood Inventory
Framing Lumber
- 2x4 through 2x12 - All Lengths
- Kiln-Dried Spruce-Pine-Fir (SPF)
- Southern Yellow Pine Structural
- Stud-Cut Precision Lengths
Pressure Treated
- Ground Contact Rated Decking
- Treated 4x4 & 6x6 Posts
- Radius Edge Step Treads
- Fencing Materials & Pickets
Plywood & Panels
- OSB & CDX Sheathing
- Marine Grade Plywood
- Sanded Pine & Birch Shop Panels
- Fire-Retardant Treated Panels
Custom Cutting & Sizing
Save time on the job site with our precision cutting services. We offer professional sizing for all framing lumber, plywood, and structural timber. Whether you need custom lengths or specific deck board dimensions, our yard team ensures every cut meets your project specifications. Please note that high-volume orders may require advance notice.
Many Doors To Choose From. We Make Custom Doors to Design.
Exterior Doors
Exterior And Interior Doors
Many Doors To Choose From. We Make Custom Doors To Design.
Interior Doors
