White River Hardwoods
Mason’s Mill & Lumber is proud to be a distribution partner for White River Hardwoods, a Fayetteville, Arkansas manufacturer known for solid hardwood tambour panels, ornamental mouldings, hand-carved woodcarvings, and other architectural surface products.
Why specify White River Hardwoods?
White River offers a complete range of decorative architectural products, making it easier to source multiple elements of a room from one manufacturer. Instead of sourcing tambour from one vendor, mouldings from another, and architectural details from a third, designers and builders can find everything from flat paneling and curved tambour to crown and base mouldings, corbels, capitals, radius corners, and stone veneer in one catalog.
White River at a Glance
- 3,000+ profiles across five moulding collections; 10,000+ total SKUs
- Manufactured in the USA — Fayetteville, Arkansas
- Ships unfinished; accepts stain or paint
- Solid North American hardwoods: Red Oak, Hard Maple, Poplar, White Oak, Walnut, Cherry
- Custom profiles, custom CNC, and coffered ceiling systems available
- Priming and sanding services available in three tiers
- 50+ years manufacturing decorative millwork; distribution in 50 states and 27+ countries
Browse White River Hardwoods
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 |
Quote
Let Mason's MillHelp You Choose
With seven product lines, more than 3,000 profiles, and a wide selection of wood species, there’s a lot to consider when choosing the right White River products for a project.
The best option often depends on details that don’t always show up on a spec sheet, like whether the wall is flat or curved, whether the space needs to balance acoustics with its overall design, or whether the new woodwork needs to match existing cabinetry or other finishes.
Tell us a little about your project and what you’re looking to accomplish, and our team can help narrow the options down to the profiles and products that make the most sense for your application.
Frequently Asked Questions
Tambour panels are solid hardwood slat panels on a flexible backing, used for feature walls, kitchen island waterfalls, curved reception desks, columns, cabinetry faces, and casework. The flexible backing lets one panel wrap curves and outside corners that rigid paneling cannot.
No. Tambour panels are not suitable for wet or high-humidity environments, including showers, bathrooms, and pools. Installation in high-moisture conditions may void the warranty.
Red Oak, Hard Maple, Poplar, White Oak, and Walnut. All panels ship unfinished and accept any stain or paint.
Standard tambour panels have a 7–10 business day lead time. Custom panels to spec, up to 120" wide, are also available.
In rooms with strong parallel reflective surfaces, covering 25–40% of total surface area gives a meaningful acoustic improvement. One carton of Harmony Series panels covers approximately 16.41 sq. ft.
No. All mouldings ship unfinished and accept stain or paint. Priming and sanding services are available in three tiers, and Mason's Mill offers factory-applied finishes.
Mon Reale uses a fine-grain overlay contoured onto solid Poplar for high-relief ornamental detail across 142 profiles. Traditional mouldings are milled entirely from solid clear Poplar in 219 plainer, classically proportioned profiles.
Yes. A resin option is available for curved walls, columns, and radius ceilings on both the Mon Reale and traditional lines. Tambour panels wrap curves directly with no special option needed.
Yes. Tambour panels, mouldings, and MDF radius corners are manufactured in the USA at White River's Fayetteville, Arkansas facility. Select carvings are also USA-made.
Mason's Mill & Lumber Co. is a White River distribution partner and supplies the full catalog, including custom milling and factory finishing. Request a quote below or contact our sales team at sales@masonsmillandlumber.com.
Request a White River Hardwoods Quote
Use the form below to contact our sales team and start your next White River project today.