When it comes to crafting a sauna that blends aesthetic appeal, resilience, and long-lasting performance, few materials compare to thermo-aspen. This premium wood undergoes a natural thermal modification process that enhances its durability, stability, and resistance to moisture—making it an ideal choice for sauna environments.
Thermo-aspen is a sustainably sourced hardwood that undergoes an intense heat treatment process, reaching temperatures of up to 400°F in a controlled, oxygen-reduced environment. This process:
The result? A dimensionally stable, low-maintenance wood that not only looks stunning but performs exceptionally well in the demanding conditions of a sauna.
Not only does thermo-aspen create a soft, ambient feel, it also has other properties that make it an excellent wood choice for the sauna.
Saunas face constant cycles of heat, humidity, and cooling, which can cause lesser woods to crack, warp, or deteriorate over time.
Thermo-aspen’s stability and moisture resistance ensure your sauna retains its shape and integrity for years, requiring minimal upkeep.
With its deep, warm tones and smooth, knot-free grain, thermo-aspen brings a modern, refined aesthetic to any sauna.
Over time, it maintains its natural beauty without the need for additional treatment or finishes.
The thermal modification process uses only heat and steam—no harmful chemicals or preservatives—making thermo-aspen an eco-conscious choice for sauna lovers who prioritize sustainability.
Unlike some woods that can release resin or become too hot to the touch, thermo-aspen is:
Whether you prefer a sleek, modern aesthetic or a traditional sauna build, thermo-aspen works beautifully in:
•Walls and ceilings for a seamless, high-end finish.
•Benches and backrests for a comfortable, splinter-free experience.
•Custom-built saunas that require precision craftsmanship and high performance.
•Modular freestanding saunas that can be installed in a single day and taken down and move when you move.
Wood types can be mixed and matched in the sauna. Thermo-aspen offers a clean contrast to lighter wood types such as aspen, hemlock, or alder.
A sauna built with thermo-aspen offers more than just a place to unwind—it’s a fusion of luxury, durability, and natural wellness. With its deep caramel tones, moisture resistance, and superior stability, thermo-aspen is one of the best materials for sauna construction.
We offer two premium options to suit your needs:
✔️ Custom Thermo-Aspen Saunas – Designed to fit your vision, handcrafted to perfection.
✔️ Modular Freestanding Thermo-Aspen Saunas – Quick to assemble, moveable, and ready to use.
Whether you’re looking for a built-in masterpiece or a moveable sauna solution, we have the perfect fit for you.
If you can dream it, we can build it. A custom thermo-aspen sauna is the ultimate choice for those who want unmatched craftsmanship, flexibility, and design freedom. Thermo-aspen is available for custom indoor saunas, custom outdoor saunas, and custom infrared saunas.
Tailored to Your Space & Style — Whether you’re building a luxury indoor spa, a backyard retreat, or an integrated wellness space, a custom sauna ensures a perfect fit. Every element is designed to complement your home, cabin, or commercial space.
Precision Craftsmanship & High-End Materials — Our skilled builders use handcrafted, precision carpentry techniques to create a sauna that is as durable as it is beautiful. The knot-free, resin-free qualities of thermo-aspen enhance both the sauna’s longevity and its aesthetic appeal.
Full Customization – Layout, Benching, Heater & More — Unlike pre-designed kits, a custom sauna allows you to personalize:
Built Seamlessly into Your Home or Property — A custom sauna integrates flawlessly into your architecture, whether it’s a basement wellness center, an outdoor spa, or a modern rooftop sauna.
Indoor & Outdoor Options — With thermo-aspen’s exceptional moisture resistance, a custom sauna can thrive indoors or outdoors—in your home, by the lake, or nestled into the woods.
The Ultimate Long-Term Investment — A custom sauna adds value to your home and well-being, providing a lifetime of relaxation, health benefits, and personal enjoyment.
Everything You Need, Ready to Assemble — Each sauna kit includes pre-built panels, benches, and a heater – everything except electrical hookup.
Multiple Sizes & Layouts to Fit Any Space — Choose from various sizes and designs, whether you want a cozy 2-person retreat or a spacious sauna for entertaining guests or laying down in.
All-Glass Fronts for a Modern Look — Our modular saunas are available with full-glass fronts, creating a stunning, open atmosphere that enhances your backyard or wellness space.
Customizable Heating Options — Select from premium electric or wood-burning sauna heaters, including top brands like Finnleo, Iki, and Saunum, to match your heat and steam preferences.
Fast & Hassle-Free Installation — Unlike a fully custom-built sauna, a modular sauna can be set up in just hours (at most a day), so you can start enjoying your sauna experience almost immediately.
Portable & Moveable – Take Your Sauna with You — Decide to move in the future? No problem. Unlike built-in saunas, modular saunas can be taken down and reassembled at your new home or cabin, making them a smart long-term investment.
Let’s Build Your Dream Sauna.
500 Cokato St W Suite #4,
Cokato, Minnesota 55321
Monday – Friday: 8AM-5PM
Saturday: 9AM-12PM
After hours appointments available, please call 612.505.9700 to schedule.
Our response times are quick. A team member will reach out to you after you submit the form!
