What is Thermally Modified Wood?
Thermal modification technology enhances wood by reducing its moisture content at the molecular level. This process stabilizes the wood dimensionally, minimizing movement for superior long-term performance in exterior applications. Backed by a 25-year durability guarantee.
Real American Lumber
Crafted from 100% American-grown species offering a beautiful & versatile range of options.
Made from 100% American lumber for authentic beauty.
Water & Weather Proof
Thermal modification lowers moisture content for dependable performance in every climate.
Performs in any climate, from heavy rain to extreme heat.
Rot & Pest Resistant
With lower moisture content, the boards are naturally resistant to termites, mold, and decay.
Naturally resistant to termites, mold, and decay.
Stable & Durable
Strengthened at a cellular level, minimizing warping, shrinking, and splitting.
Minimizes warping, shrinking, and splitting for lasting strength.
Shop All Thermally Modified Wood Products
Get Inspired
From lakeside cabins to commercial buildings, see how designers, architects, and homeowners use thermally modified wood to bring warmth, contrast, and natural texture to modern exteriors.
Rapid City, SD | Modern Exterior Cladding in Light Ash
What Clients Are Saying
Our thermally modified wood has become a go-to for clients looking for high performance and beauty. Here’s what they’re saying about working with us:
Frequently Asked Questions
All of our thermo products are made from 100% authentic, thermally modified wood. Every species is domestically sourced clear grade lumber that is milled and finished in our North American production facility.
This is dependent on your vision and preferences for design. The siding or decking
can be installed with no regular maintenance required, which will allow the wood to
develop into a beautiful silver color over time. If you wish to maintain or restore the
original color, you can apply a fresh coat of oil based sealant at any time.
Thermally modified wood is built to perform in any climate — from hot, dry regions to areas with high humidity, heavy rain, or freezing winters. The thermal modification process transforms the wood’s cellular structure, making it naturally stable and water-repellent to prevent swelling, warping, and cracking through seasonal temperature and humidity changes.
Installation is super simple! We recommend using exterior grade stainless steel nails directly through the tongue of the boards into furring strips. Full installation instructions can be found here.
Installation is super simple! We recommend using a hidden fastener system for the best result and appearance. Full instructions can be found here.
Each bundle contains 15 square feet of
coverage. You can use the square footage calculator, found here below the ‘Add to
Cart’ button. Or you can contact our team for assistance through live chat, email us
at support@woodplank.com or call us at (844) 755-9663.
Yes, absolutely. First attach furring strips securely to the existing substrate. Then install the cladding directly onto the furring strips using exterior-grade stainless steel nails. This creates proper ventilation behind the boards and ensures a long-lasting, stable installation.
Yes, we are able to customize for specific lengths, mill profiles and color tones upon
request with one of our sales reps in order to bring your design vision to life! Please
give us a call at (844) 755-9663 to discuss next steps.
Yes, we manufacture a matching trim product in the same species as your cladding.
Just let us know how many linear feet you'll need and we can add it to your order.
You can find our trim here.
In addition to poplar and ash, we offer a wide variety of other thermally modified and non-thermally modified options suitable for exterior and interior applications. You can explore our full range of options here.
We ship anywhere in the USA in 2-3 weeks via UPS or an LTL carrier, and send
tracking information once it ships. Please note that lead times may vary depending
on the season. Expedited options available upon request.
We accept returns or exchanges within 30 days from your delivery date. Please refer
to our Refund Policy here.
Order Free Samples
Feel the texture, see the color, and choose with confidence. All samples ship fast and include a $25 credit toward your next order.
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Installation Guides
Clear, step-by-step instructions to help you install with confidence, whether you’re working on a full facade or small accent wall.
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