Thermo Spruce & Thermo Pine Sauna Wood

Enhance your sauna with Thermo Spruce & Thermo Pine sauna wood, expertly heat-treated for improved durability, rot resistance, and a beautifully deepened colour. These premium, sustainably sourced coniferous timbers create a rustic, natural sauna aesthetic. Explore our collection of cladding, bench boards, and sauna battens for a robust and timeless sauna build.

Why Choose Thermo Spruce & Thermo Pine for Your Sauna?

Thermo Spruce and Thermo Pine offer a rustic, durable, and darker alternative to traditional sauna woods. Through an advanced thermal modification process, these coniferous timbers become
highly resistant to moisture, decay, and temperature fluctuations—making them ideal for sauna interiors and exteriors.

Both Thermo Spruce and Thermo Pine develop a deepened colour after heat treatment, with Thermo Pine exhibiting a slightly darker brown hue than Thermo Spruce’s golden tone. The process also reduces resin secretion, creating a low-maintenance, high-performance sauna wood.

✔ Heat-Treated for Strength – Enhanced durability, minimising shrinkage, swelling, and warping.

✔ Rustic Aesthetic – Retains its natural knots and grain for an authentic sauna look.

✔ Resin Reduction – Less resin secretion compared to untreated coniferous woods.

✔ Rich Colour & Pleasant Scent – The heat process enhances the timber’s warm tones and imparts a toasted aroma, loved by sauna enthusiasts.

✔ Sustainably Sourced – Carefully selected A & B grade timber from the Baltic & Nordic regions.

For best results, we recommend treating Thermo Spruce and Thermo Pine with paraffin oil to further deepen the colour and enhance
protection.

Our Thermo Spruce & Thermo Pine Sauna Wood Collection

Finnmark Sauna provides a carefully selected range of thermally modified spruce and pine for various sauna applications:

✔ Sauna Wood Cladding – Premium tongue-and-groove profiles for interior and exterior sauna
walls.

✔ Sauna Bench Boards – Smooth, heat-treated
boards designed for comfort and durability.

✔ Sauna Bench Framing (Thermo Spruce) – Strong
and stable for robust sauna bench construction.

✔ Sauna Battens & Heater Guards – Ideal for all sauna builds to improve durability and safety.

Thermo Spruce Sauna Wood Profiles:

STP Profile Tongue & Groove Cladding – 15mm thick × 90mm wide
Sauna Bench Framing Timber – 57mm thick × 57mm wide

Thermo Pine Sauna Wood Profiles:

Kallio Tongue & Groove Cladding – 15mm thick × 90mm and 118mm wide
Sauna Wood Bench Board – Often 26mm thick SHP profile in different widths
Rainscreen Rhombus Sauna Batten – To create a crucial airgap in between the insulation and interior sauna cladding