Prosaunas Aspen tongue and groove 1x4 STS4 profile creates a bold look, and is recommended for sauna walls and ceilings. Prosaunas selects premium, straight-grained Aspen with a uniform texture and an elegant light, creamy color. Aspen is an excellent choice when creating an upscale, contemporary looking sauna.

Aspen is a perfect sauna material for many reasons. It has very good dimensional stability, does not split when nailed, and its thermal properties are ideal in a sauna. Because of Aspen’s low heat conductivity, it will remain comfortable to the touch even in the extreme heat of a sauna.

The narrow, angular grooves of STS4 wall panels produce the modern nickel-gap look. STS4 can create a sophisticated contrast effect when combined with other wood profiles. Prosaunas distinctive nickel-gap panels are precision-milled to our precise specifications, creating a contemporary Scandinavian aesthetic.

Prosaunas carefully selects only the finest wood from Northern Europe and Canada, assuring that the quality and consistency of our wood selection is the best available. Our team has more than 55 years of experience crafting premium sauna rooms across North America, and we only offer wood that meets our stringent standards. Because of our total commitment to quality, we can ensure your wood order will arrive to your satisfaction.

Wood Sizing - Nominal vs. Actual Lumber Sizes: In North America, wood sizes are given in "nominal" measurements, which is the lumber’s size when it is cut from moist logs. After shrinkage from drying and surfacing, the actual size of lumber will be less than its nominal size. Please see the diagram for actual dimensions.