Skip to content
Free Shipping On All Orders, Contiguous US.
Free Shipping On All Orders, Contiguous US.
Premium Thermo-Spruce 1x4 T&G STP Sauna Wall Cladding

Premium Thermo-Spruce 1x4 T&G STP Sauna Wall Cladding

SKU WOOD668-1
by ProSaunas
$2.50 - $25.00
$2.50
$2.50 - $25.00
$2.50

The PROSAUNAS Thermo-Spruce 1x4 STP tongue-and-groove cladding is designed to bring natural warmth and durability to your sauna interior. With its rich amber tone, refined surface, and rustic knot pattern, Thermo-Spruce combines traditional charm with modern performance.

Thermal modification transforms natural spruce into a superior building material by using only heat, steam, and pressure—no chemicals. This process enhances the wood’s dimensional stability, water resistance, and overall strength, making it ideal for the extreme conditions of a sauna. Thermo-Spruce maintains an optimal moisture balance, resists decay and pests, and retains its beautiful finish for years of reliable use.

  • Ideal for sauna walls and ceilings
  • Enhanced durability and long-lasting performance
  • Resists warping, cracking, and moisture damage
  • 100% chemical-free and naturally eco-friendly
  • Maintains optimal moisture content for sauna conditions
  • Rounded edges and narrow grooves for a smooth, refined appearance
  • Broad cladding boards create a cohesive, seamless look
  • Natural wood finish adds warmth and character
  • Can be paired with other profiles
  • Species: Spruce
  • Finish: Thermally Modified
  • Wall Coverage: 3.1" (80 mm)
  • Product Width: 3.54" (90 mm)
  • Product Thickness: 0.59" (15 mm)
  • Shipping Length: Up to 10'