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Premium Thermo-Spruce 1x4 T&G STS4 Sauna Wall Cladding

Premium Thermo-Spruce 1x4 T&G STS4 Sauna Wall Cladding

by ProSaunas
SKU WOOD673-1

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 STS4 cladding brings a modern edge to traditional sauna design. Its narrow, angular grooves create a sleek nickel-gap look, adding depth and contrast to walls and ceilings. With a rich amber tone and natural knotty texture, Thermo-Spruce combines rustic warmth with contemporary Scandinavian style.

Through a natural thermal modification process using only heat, steam, and pressure, the wood gains enhanced durability, moisture resistance, and stability. Perfect for high-heat environments, it resists warping and decay while maintaining its elegant finish—an ideal, eco-friendly choice for refined sauna interiors.

  • Thermo-Spruce Wood: Thermally modified for improved durability and stability.
  • T&G STS4 Profile: Tongue-and-groove paneling with narrow grooves for a clean, modern look.
  • Ideal for Sauna Walls & Ceilings: Designed for high heat and humidity environments.
  • Resists Warping & Moisture: Stable in changing sauna conditions.
  • Chemical-Free: Thermal modification process uses no added chemicals.
  • Eco-Friendly: Sustainably produced natural wood.
  • Balanced Moisture Content: Optimized for long-term sauna performance.
  • Natural Wood Appearance: Maintains authentic grain and texture.
  • 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