Wood types
Wood Types Used in Our Saunas, Cold Plunges & Hot Tubs
At Theradia Wellness, we partner with the world’s leading wellness brands — including Mande, SaunaLife, and Dundalk LeisureCraft — to bring you authentic, handcrafted products made from premium, sustainable wood species.
Each wood type offers unique advantages in appearance, durability, and performance. Whether you’re building an outdoor sauna retreat, a cold plunge setup, or a wood-fired hot tub, the material matters.
Quick Brand-to-Wood Guide
| Brand | Primary Wood Types | Where It’s Used |
|---|---|---|
| Mande Spas (MW Series) | ThermoWood® (thermally modified spruce/pine) | Cube saunas & outdoor models |
| SaunaLife (ERGO & Elegance Barrels) | Thermo-Spruce | Barrel saunas |
| SaunaLife (Garden G2 & G4 Cabins) | Nordic Spruce (walls) + Grade-A Aspen (benches) | Cabin-style saunas |
| SaunaLife (G6 Cabin) | Furniture-grade Alder interior + Spruce exterior | Premium pre-assembled cabin sauna |
| SaunaLife (S2N Cold Plunge) | Thermo-Pine | Hot & cold plunge |
| SaunaLife (S4N / S4B Wood-Fired Tubs) | Thermo-Spruce | Outdoor wood-fired tubs |
| Dundalk LeisureCraft – Canadian Timber | Eastern White Cedar | Barrel, pod, and cabin saunas |
| Starlight Hot Tubs | Knotty Cedar exterior + Aluminum liner | Wood-burning hot tubs |
About Each Wood Type
ThermoWood® / Thermo-Spruce / Thermo-Pine
Thermally modified wood is heat-treated with steam to remove moisture, increasing durability and reducing shrinkage or warping.
- Ideal for outdoor exposure and year-round performance
- Naturally resistant to rot and insects
- Warm brown tone that weathers gracefully to silver gray
Nordic Spruce
A Scandinavian favorite, valued for its strength and smooth appearance.
- Used in structural beams and walls
- Tight grain and light color brighten sauna interiors
Aspen (Grade-A)
A premium bench wood known for staying cool to the touch.
- Knot-free, hypoallergenic, and comfortable
- Ideal for sauna benches and backrests
Alder
Furniture-grade hardwood often used in luxury saunas.
- Smooth texture and gentle warmth
- Naturally resists cracking under heat
Eastern White Cedar
Aromatic, beautiful, and built for longevity.
- Naturally rot- and insect-resistant
- Distinct aroma for a calming spa atmosphere
Cedar (Knotty)
Rustic and durable, perfect for outdoor tubs and cabins.
- Rich scent and natural weather resistance
- Minimal maintenance required
Comparison: Cedar vs. ThermoWood®
| Feature | Cedar | ThermoWood® |
|---|---|---|
| Natural oils / aroma | Strong aroma, insect-resistant | Neutral scent, heat-treated stability |
| Color over time | Turns silver-gray if unfinished | Deep brown, also grays naturally |
| Dimensional stability | Good | Excellent — minimal swelling or shrinkage |
| Ideal use | Outdoor hot tubs & traditional saunas | Modern cube/barrel saunas & plunge tubs |
Care & Maintenance Tips
- Protect the finish: Use a UV-resistant outdoor oil annually to maintain color.
- Allow drainage: Keep bases elevated and dry to prevent standing water.
- Gentle cleaning: Use mild soap and a soft brush for exteriors; avoid harsh chemicals on interiors.
Explore by Wood Type
Shop Authentic. Shop Quality.
Every wood-crafted wellness product at Theradia Wellness is backed by:
Free Shipping on Mande USA and Leisurecraft Orders; Flat Rate Shipping on SaunaLife orders
Secure Checkout with Multiple Payment Options
Authorized Dealer Warranties
Dedicated Customer Support
Experience nature’s craftsmanship — redefined for modern wellness.