Plywood
Our plywood inventory supports builders and cabinetry makers with dependable stock, clean faces, and flexible core options. Standard panels, custom layups, and specialty sheet goods—sourced to meet the demands of construction and production environments.
Plywood & Sheet Goods
At Mason’s Mill & Lumber, plywood isn’t an afterthought — it’s a working material. We stock and source sheet goods that builders and cabinetry makers rely on every day, with the consistency, face quality, and core options required for real jobsite and shop conditions.
From domestic NAUF and ULEF panels to specialty outdoor and moisture-resistant options, our inventory is built to support production schedules, not slow them down.
Custom Layups& Specialty Sheet Goods
For projects that need more than an off-the-rack panel, we offer custom plywood solutions through our sourcing and manufacturing partners.
Custom capabilities include:
Custom veneer layups
Different faces on each side (species-to-species or veneer to melamine)
Pre-finished custom panels
Cut-to-size options (within project scope)
- UV finishing
These solutions are typically handled job-by-job, allowing builders and cabinet shops to dial in exactly what the project requires — without over-ordering or unnecessary compromises.
If your project needs something specific, our team can help spec the panel before it ever shows up onsite.
Browse our Plywood Selection
Thermac Poplar — Cutek Extreme Clear Finish
Thermac Poplar is a thermally modified Appalachian hardwood produced by Bingaman & Son Lumber from native Pennsylvania yellow poplar. Using only heat and steam — no chemicals, plastics, or additives — the wood is heated in a low-oxygen environment to fundamentally alter its cell structure. This process removes the sugars and moisture that fungi and insects need to survive, while permanently reducing the wood's ability to absorb water. The result is a stable, rot-resistant hardwood with a warm, chocolate-brown color that runs consistently through the entire board, not just the surface.
Yellow poplar is particularly well-suited to thermal modification: it's a domestically abundant, fast-growing hardwood that emerges from the process with excellent dimensional stability, a smooth grain, and a rich color that rivals more exotic species. Independent testing on thermally modified yellow poplar has demonstrated Durability Class 1 ("very durable") performance against wood-destroying fungi, placing it in the same durability tier as many tropical hardwoods.
Each board is finished with Cutek Extreme Clear, a penetrating oil that migrates deep into the wood fibers rather than forming a surface film. Cutek's core function is dimensional stabilization — it works from inside the board to slow moisture movement, which is what causes cupping, checking, and end-splitting in exterior wood. Because the finish penetrates rather than coats, it cannot peel or flake, and maintenance requires no sanding or stripping — just clean the surface and re-apply when it looks dry. The clear formulation adds no pigment, so the poplar's natural thermally-modified brown will show through initially and gradually transition to a silver-gray patina if left unmaintained with a colortone.
Ideal for exterior siding, soffits, porch ceilings, cladding, and covered outdoor applications where a domestic hardwood with contemporary durability is desired.
Specifications
| Spec | Detail |
|---|---|
| Species | Yellow Poplar (Liriodendron tulipifera) — thermally modified |
| Product Line | Thermac by Bingaman & Son Lumber |
| Origin | Appalachian / Pennsylvania hardwood |
| Modification | Thermal modification — heat and steam only, no chemicals |
| Finish | Cutek Extreme Clear (penetrating oil) |
| Finish Type | Oil-based, non-film-forming |
| Color | Rich chocolate brown, consistent through the full board |
| Weathering | Silvers to gray patina over time if not maintained with colortone |
| Durability Class | Class 1 ("very durable") when tested per EN 350 standards |
| Janka Hardness | ~500–615 lbf (thermally modified yellow poplar) |
| Dimensional Stability | Significantly improved vs. untreated poplar; tangential/radial movement ~1.1–1.2% |
| Service Life | Designed for up to 25 years in exterior applications |
| Applications | Exterior siding, soffits, porch ceilings, cladding, covered outdoor living, trim |
| Maintenance | Clean and re-oil with Cutek Extreme as needed — no sanding or stripping required |
| Sustainability | Domestic, fast-growing hardwood; chemical-free modification process |
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Extensive Inventory, Ready to Work
We offer a deep selection of domestic and imported plywood, available in a wide range of species, cores, and thicknesses — typically from 1/4″ through 1″, with larger and specialty thicknesses available by request.
Available options include:
NAUF panels
ULEF certified plywood
MDF core and combination core stain-grade panels
MDF sheets from 1/4″ to 1-1/8″
MDO for exterior and formwork applications
Every product we stock is selected with flatness, consistency, and finish quality in mind — the things that matter once the sheet hits the saw or goes on the wall.
Frequently Asked Questions
We carry a wide range of domestic and imported plywood, including NAUF panels, ULEF-certified plywood, MDF core, combination core, MDO, and specialty sheet goods. Thicknesses typically range from 1/4″ to 1″, with additional options available by request.
Yes. We can source custom plywood layups on a project-by-project basis. Options include custom veneers, different faces on each side, melamine on one face with wood veneer on the other, and pre-finished panels depending on project requirements.
Cut-to-size services are available within reason and are typically handled as part of a larger project or custom order. Our team can help determine what makes sense based on your application and timeline.
For exterior and moisture-exposed applications, we stock MDO panels, Tricoya™ waterproof MDF with a 50-year rot warranty, and Modern Mill ACRE™ sheet goods designed for durability and long-term performance outdoors.
Our plywood and sheet goods are primarily used by builders, cabinetry shops, and millwork professionals working in residential and commercial construction. We focus on materials that perform well in jobsite and shop environments where consistency and availability matter.
Start your next Plywood Project with Mason's Mill today!
Let’s Spec It Right Whether you need stocked panels, a custom layup,
or help selecting the right sheet good for the job, our team is here to help.