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

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

by ProSaunas
SKU WOOD668-1

Please Note: There is a $249 flat-rate shipping fee on all wood orders other than a sample. Samples ship for FREE!

$2.50 - $25.00
$2.50
$2.50 - $25.00
$2.50
Request a personalized quote!

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.

  • Thermo-Spruce Wood: Thermally modified for improved durability and stability.
  • T&G STP Profile: Tongue-and-groove paneling with rounded edges and narrow grooves.
  • Ideal for Sauna Walls & Ceilings: Designed for high heat and humidity environments.
  • Enhanced Durability: Stable material for long-lasting sauna performance.
  • Resists Warping & Moisture: Performs well in changing sauna conditions.
  • Chemical-Free: Thermal modification process uses no added chemicals.
  • Eco-Friendly: Sustainably produced natural wood.
  • Balanced Moisture Content: Optimized for sauna environments.
  • Broad Cladding Boards: Creates a cohesive and seamless wall appearance.
  • Natural Wood Finish: Adds warmth and character to sauna interiors.
  • Compatible Profiles: Can be paired with other matching sauna panel 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'

Wood orders ship via FedEx Ground (smaller orders) or LTL freight with lift gate (larger orders), depending on quantity, size, and weight. All orders are packaged securely in cardboard or on custom pallets.

Delivery Timeline

  • 2-4 Weeks