Exterior Cladding
& Siding Solutions
Durable, high-performance materials
milled to your exact design and dimensions.
Cladding & Siding
Transform exterior environments with siding and cladding built to last. At Mason’s Mill & Lumber, we supply architects, builders, and contractors with precision-milled exterior materials designed for long-term beauty and performance.
From modern rainscreen systems to traditional lap siding, our mill offers the quality, flexibility, and speed your project demands.
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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Why Siding & Cladding Matter
Your exterior material choice isn’t just about aesthetics—it’s about protection, performance, and longevity.
Quality siding and cladding shield your structure from moisture, UV exposure, and temperature shifts while defining its architectural character.
Key Benefits:
Shields your structure from weather and UV damage
Adds texture, rhythm, and visual warmth
Increases property value through lasting curb appeal
Reduces maintenance and replacement costs over time
Material Options
Your exterior deserves materials that look exceptional and perform even better. Mason’s Mill & Lumber supplies a comprehensive selection of wood, thermally modified, and composite materials for siding and cladding applications — all precision-milled for stability, consistency, and architectural expression.
Natural Wood
Thermally Modified Wood
Composite Materials
Frequently Asked Questions
Both protect and define a building’s exterior, but “siding” typically refers to materials used on residential homes, while “cladding” is the broader architectural term used for commercial or custom applications. At Mason’s Mill & Lumber, we supply both—custom-milled to suit your project’s design and performance requirements.
Yes. Our in-house mill can match or reproduce nearly any profile from drawings or samples. Whether you need shiplap, tongue-and-groove, channel, or modern rainscreen cladding, we can produce precise dimensions, edge details, and finishes for a perfect fit.
We recommend durable, stable materials that can handle heat, humidity, and UV exposure—such as Thermory® thermally modified wood, Accoya® acetylated wood, or Modern Mill ACRE™ composite. Each performs exceptionally well in harsh environments while maintaining its appearance for decades.
A rainscreen system creates an air gap between the siding and the building envelope, allowing trapped moisture to escape. This design helps prevent rot, mold, and warping, while improving energy efficiency. Many of our products are ideal for rainscreen installation.
Yes. We ship and deliver materials throughout Texas and across the U.S., with next-day delivery available for many stocked items. For large or custom orders, our team coordinates logistics to ensure materials arrive on time and in excellent condition.
Yes. We stock the full range of exterior accessories so your siding system performs as intended.
Available options include:
Stainless or coated screws and clips designed for wood and composite rainscreen systems
Specialized drill bits, trim hardware, and concealed fastening options
High-quality sealers, oils, and stains formulated for exterior woods
Color-matched corner boards and trim materials
Our team can help you pair the right hardware and finish system with your chosen material — ensuring consistent aesthetics and long-term performance.
A rainscreen system is a modern cladding design that includes a small ventilation cavity between the cladding boards and the wall sheathing. This gap allows moisture to drain and air to circulate, protecting the structure from trapped humidity and water damage.
Benefits include:
Longer material lifespan and reduced maintenance
Improved building envelope performance
Better indoor air quality through moisture control
Compatibility with vertical and horizontal installations
At Mason’s Mill, our materials like Accoya®, Thermory®, and Modern Mill ACRE™ are ideal for rainscreen applications, combining dimensional stability with resistance to rot and decay.
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