Alder has long been known as nature’s perfect sauna companion, with natural water-repellent properties and optimal thermal conductivity to prevent overheating while creating a comfortable, balanced sauna environment. The distinctive reddish tones, understated honey-like smell, and pleasant texture make alder a safe choice with mass appeal.

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    5/4 x 4 shp sauna bench wood alder by thermory
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    5/4 x 4 SHP Alder Bench, Backrest, and Skirt Sauna Wood

    Thermory
    $4.32 – $172.65

    Alder 1×4 SHP Bench material is the classic choice for a timeless sauna.  With subtle yet appealing tone and aroma, Alder is the perfect natural sauna material with moisture wicking properties. Recommended Uses: Sauna benches, backrests, and skirting.

    1×4 Bench Boards are an easy and low-cost way to build a premium sauna bench framed with standard 2x4s and decked with these .83″ thick boards horizontally or vertically.  See below for our framing suggestion.

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    Thermory 1x4 Sauna Bench Wood SHP in Alder
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    Thermory 1×4 SHP Alder Bench, Backrest, and Skirt Sauna Wood

    Thermory
    $3.52 – $176.13

    Alder 1×4 SHP Bench material is the classic choice for a timeless sauna.  With subtle yet appealing tone and aroma, Alder is the perfect natural sauna material with moisture wicking properties. Recommended Uses: Sauna benches, backrests, and skirting.

    1×4 Bench Boards are an easy and low-cost way to build a premium sauna bench framed with standard 2x4s and decked with these .83″ thick boards horizontally or vertically.  See below for our framing suggestion.

    Select options This product has multiple variants. The options may be chosen on the product page
    thermory wall to wall transition t in alder
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    Alder Wall To Wall Flat T Transition Trim

    Thermory
    $34.80

    Need longer wall cladding boards in alder than those available by Thermory?  We make those transitions easy with this T moulding to avoid gaps with a professional look.  Common on walls and ceilings in commercial saunas.

    Note: These will arrive directly from Thermory USA in bundles of two in 7′ and 8′ lengths.

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    thermory alder 1x1 si ceiling to wall transition sauna trim
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    Alder Moulding 1×1 SI Sauna Ceiling Trim By Thermory

    Thermory
    $2.00 – $64.00

    Alder 1×1 SI makes sauna building easier than ever.  These 0.59″x 0.71″ are ideal for concealing the gap and giving a professional finish to any wall-to-ceiling transition.  Make it easy, make it beautiful with Thermory 1×1 ceiling mouldings in Alder.

    Note: These will arrive directly from Thermory USA in bundles of four in 7′ and 8′ lengths.

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    1x1 Alder trim shp moulding in natural alder sauna wood
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    Alder Moulding 1×1 SHP Sauna Trim, Floor, and Bench Wood By Thermory

    Thermory
    $2.00 – $160.00

    Alder 1×1 SHP is a versatile sauna material for trim, benches, internal corner molding, and sauna floors.  Cover any inward-facing corners in your sauna with this elegant moulding profile in natural alder.  Alder is a hardy and water-repellent wood that doesn’t overheat, with a beautiful reddish tone and a pleasant texture.

    These 0.83″ thick boards are ideal for creative projects and making your sauna design truly unique.  Note: These can only be purchased in bundles of 10 in 7′ and 8′ lengths.

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    alder 5/4 x 3 step motion sauna wood
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    Alder 5/4×3 STEP Wall Cladding – Sauna Wood by Thermory

    Thermory
    $3.72 – $223.97

    Step up your game and build the sauna of your dreams with Alder STEP Cladding by Thermory.  The broad, square grooves create a striking shadow effect, adding depth and intrigue to any space.  It’s our go-to for vertical wall cladding in any high-end sauna build.

    Alder is a popular and timeless sauna wood with natural water repelling properties.  It’s a medium tone with reddish tints and a subtle honey-like aroma.  At Sauna Marketplace, we make it easy to build an Alder sauna with matching benches, backrests, bench skirts, vent hatches, floor grids, and more.

    The actual wall coverage is 2.2″, which completes the step.

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    Black Brushed Alder 1x5 Thermory STS4 Sauna Wall and Ceiling Wood
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    1X5 Brushed Black Alder STS4 Wall Cladding – Sauna Wood by Thermory

    Thermory
    $4.56 – $268.00

    Looking for a smooth, black sauna wood with a professional finish?  The wire-brushed black wax alder by Thermory is a perfect choice for a durable finish.  Whether contrasting with woods like thermo-aspen or going all dark for the ancient ‘smoke sauna’ look this STS4 1×5 is an ideal choice for a wide plank wall and ceiling cladding.  Actual wall coverage is 4.4″.

    Note: Brushed black alder does NOT have the burnt Shou Sugi Ban (yakisugi) look as other websites incorrectly show.  Please ask us about ‘Thermory Ignite’ for that.

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    Thermory 1x5 alder sts wall and ceiling sauna wood cladding
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    1X5 Alder STS4 Wall Cladding – Natural Sauna Wood by Thermory

    Thermory
    $3.83 – $230.20

    Wide plank alder is a solid choice for any traditional Finnish sauna.  Natural alder is naturally resistant to water and a favorite among sauna builders who prefer a timeless, classic look with mild aroma.

    Actual wall coverage is 4.3″.

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    1X4 Alder STS4 T&G Wall Cladding – Sauna Wood by Thermory

    Thermory
    $2.96 – $177.62

    Coveted in Finland and worldwide, European alder brings timeless elegence to your sauna with its distinctive reddish tone and inviting texture. This premium 1×4 natural profile offers excellent thermal properties (0.12 W/m·K) and sound absorption, creating the ideal surroundings and conditions for healing heat. Completely untreated and E1 certified for ultra-low emissions, this alder tongue and groove cladding maintains its warm, honey-like fragrance while providing the perfect balance of durability and comfort. Choose this medium-toned Estonian-crafted wood for an authentic sauna experience that harmonizes tradition with European quality standards.

    1×4 STS4 By Thermory might just be nature’s perfect sauna companion.

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    prebuilt sauna bench skirts
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    Prebuilt Bench Skirt by Thermory

    Thermory
    $275.00

    It’s easier than ever to complete your sauna with a prebuilt sauna bench skirt in thermally modified Aspen or Alder.

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    Thermory Prebuilt Backrests in Alder and Thermo-Aspen
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    Thermory Prebuilt Sauna Backrest

    Thermory
    $330.00

    Ready-to-install sauna backrests from Thermory – the quick and easy solution in good taste. Pairs perfectly with our prebuilt bench modules to make the DIY sauna easier with a more professional result.

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    Prebuilt Sauna Bench Modules

    Thermory
    $467.00

    Prebuilt sauna bench modules make it easier than ever to create a high-end DIY sauna in any space. Expandable to any size, and taking corners seamlessly with degree fan-modules that be nearly impossible to build on site.

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