PROSAUNAS Thermo-Aspen Wall Material 15 x 90 mm Tongue & Groove STS4

DESCRIPTION

The ProSaunas Thermo-Aspen Tongue and Groove 1x4 STS4 Profile is a precision-milled wall and ceiling cladding that delivers a contemporary nickel-gap aesthetic in a slightly narrower board width than the 1x5 STS4 — offering the same refined Scandinavian character with a finer, more closely spaced visual rhythm across the wall surface. The narrow, angular grooves add depth and dimension to sauna walls and ceilings, creating a sophisticated contrast effect that works particularly well when combined with other ProSaunas profiles or wood types.

Crafted from premium straight-grained Thermo-Aspen with a uniform texture and warm, rich hue, it is comfortable to the touch even in high heat and does not secrete resin or splinter. Thermal modification enhances dimensional stability, water resistance, and resistance to decay, pests, and fungi through a fully organic process using heat, steam, and pressure — with no chemicals involved. ProSaunas selects only premium wood from Northern Europe and Canada, backed by over 55 years of sauna craftsmanship experience.

FEATURES

• Narrow, angular STS4 grooves create a contemporary nickel-gap aesthetic for sauna walls and ceilings
• Slightly narrower 1x4 board width produces a finer, more closely spaced visual rhythm compared to the 1x5 STS4
• Precision-milled to ProSaunas specifications for a consistent, refined Scandinavian profile
• Creates a sophisticated contrast effect when combined with other profiles or wood types
• Thermally modified Aspen does not secrete resin, splinter, or overheat — well-suited for sauna environments
• Thermal modification enhances dimensional stability, water resistance, and resistance to decay, pests, and fungi
• Chemical-free modification process for a natural, eco-friendly material
• Premium straight-grained Aspen with uniform texture and warm, rich hue for a sophisticated appearance
• Greater durability and resistance to warping compared to untreated wood
• Lighter weight than many traditional sauna woods for easier handling and installation
• Wood carefully selected from Northern Europe and Canada to meet stringent quality standards

SPECIFICATIONS

• Species: Aspen
• Finish: Thermally modified
• Profile: STS4 Tongue and Groove
• Wall Coverage: 3.1 inches (80 mm)
• Product Width: 3.54 inches (90 mm)
• Product Thickness: 0.59 inches (15 mm)
• Shipping Length: Up to 10 feet