STUNNING REAL WOOD
Thermory’s Guide to the Best Wood Species for Saunas
Every sauna has its own ambiance—some lean practical, others feel like sculpture. But no matter how you design yours, a few rules always stand: choose woods that stay cool to the touch, don’t release resin, and can handle heat and moisture without breaking a sweat.
With our expertly crafted thermal modification process using only heat and steam, our wood becomes more durable, more stable, more moisture-resistant—and richer in color. Some species keep their soft, golden tones. No chemicals. Just science, heat, and clean design.
Here’s our guide to the most popular woods we use to build beautiful, long-lasting saunas. Here in Quality European Hardwoods we can supply from stock cladding and bench boards species as well as Thermo Spruce for your Sauna’s exterior. Call Damian on 087 812 4067.
Common Aspen (Populus tremula)
Thermo Aspen is a staple for sauna interiors — smooth, light-toned, knot-free, and easy on the skin. It doesn’t get too hot, doesn’t splinter, and doesn’t secrete resin, making it a safe and comfortable choice for benches. Its clean look also works beautifully on interior walls or painted surfaces.
Common Alder / Black Alder (Alnus glutinosa)
Alder brings a warm reddish tone and a fine, pleasing texture — an inviting upgrade for interior finishes. This hardwood stays cool, repels moisture, and holds up well in demanding sauna conditions. Natural or thermally modified, alder offers a beautifully consistent appearance from wall to wall.
Norway Spruce (Picea abies)
Spruce is one of the lightest-coloured conifers, with a soft white tone and a subtle yellow undertone. It’s commonly used for sauna exteriors thanks to its clean look and versatility.
Thermo Alder Sauna
Call our team at Quality European Hardwoods today to discuss your sauna project.
