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    black brushed thermo-spruce sauna wood
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    1X4 Black Thermo-Spruce STS4 T&G Wall Cladding – Brushed & Waxed Black Sauna Wood by Thermory

    Thermory
    $4.27 – $251.00

    The Bold New Statement in Sauna Design

    Introducing Black Thermo-Spruce – the dramatic, sophisticated sauna wood that’s revolutionizing modern sauna aesthetics. This isn’t paint or stain; it’s the natural beauty of spruce transformed through Thermory’s intensive thermal modification process, creating a rich, deep black that’s as durable as it is stunning.

    Wire-brushed to perfection, each board reveals the natural grain patterns that make every installation unique. The textured surface doesn’t just look incredible – it feels amazing under your fingertips, adding a tactile dimension to your sauna experience. Finally, a true black sauna wood at a price that makes sense.

    Select options This product has multiple variants. The options may be chosen on the product page
    thermory thermo-spruce bench wood 5/4 x 4 shp
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    Thermo-Spruce Sauna Bench and Floor Wood – 5/4 SHP Sauna Wood By Thermory

    Thermory
    $2.95 – $173.46

    One of our missions at Sauna Marketplace is to make it more affordable to build a DIY sauna without compromise.  Sauna bench wood has always been a barrier, but this 5/4 SHP Bench profile from Thermory makes it easier than ever.

    Intense natural modification using heat and steam alters this Nordic Spruce at a cellular level, resulting in a more durable and healthy choice than Western Red Cedar at a fraction of the price.  Unlike WRC, this Thermo-Spruce won’t warp, expand, contract, or cup.

    Recommended Uses: Sauna benches, backrests, flooring, and skirting.  These 1.0″ thick sauna bench boards are thick enough to build the frame, but we recommend using standard 2x4s for that.  See detail below.

    Select options This product has multiple variants. The options may be chosen on the product page
    thermory thermo spruce 1x4 sts4 sauna wall and ceiling cladding in thermally modified spruce sauna wood
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    1X4 Thermo-Spruce STS4 T&G Wall Cladding – Thermally Modified Sauna Wood by Thermory

    Thermory
    $1.73 – $101.72

    Thermo-Spruce 1×4 by Thermory is the most affordable way to achieve beautiful thermally modified wood walls in your sauna.  Popular in Finland for it’s thermal performance, Nordic Spruce is also a sustainable choice.  We love the rustic look and unique, tight knots that look like wings.  Thermo-Spruce gives a pleasant, mild aroma with far lower VOC content than Western Red Cedar.  Natural thermal modification changes the wood at a cellular level to resist rot, decay, warping, and cupping.

    Actual wall coverage is 3.1″ to 3.2″, depending on installation.  Thermo-Spruce pairs well with Thermo-Aspen benches.

    Select options This product has multiple variants. The options may be chosen on the product page
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    Thermo-Spruce Sauna Wall and Ceiling Wood | T&G or STP | ProSaunas

    ProSaunas
    $2.50

    Thermally modified spruce is a popular European sauna wood known for sustainability, dark rustic charm, and characteristic rich Amber.  We recommend thermo-spruce as a more affordable, better performing alternative to Western Red Cedar that’s more typical in authentic Finnish saunas outside of America.  This wood has been thermally modified using only heat and steam for better rot resistance and performance.  The resulting wood has been altered at a cellular level and no longer expands or contracts so your sauna is sure to perform better for longer.

    We source European Thermo-Spruce cladding from Thermory and ProSaunas.  Coverage is approximately 3.1″ per board.  It’s available in T&G or STP profiles.

    Price is for sample, with free shipping within the continental US.  Please book a planning session for complete quote and timeline.  Build your entire DIY sauna package using thermo-spruce here!

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