Add modern definition to your sauna with 1×4 Thermo-Alder STS4 wall panels. The STS4 profile features narrow, angular grooves that create a sharp, linear look and can be paired with other profiles for striking visual contrast.

Thermally modified alder offers durability, stability, and a warm brown tone, making it an excellent choice for stylish, long-lasting sauna interiors.

👉 STS4 = Tongue-and-groove sauna panel with a 4 mm shadow gap.

Price starts at $3.82 / LF