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    PROSAUNAS Thermo-Spruce 2X4 S4SEE SHP Bench, Backrest & Skirting – Sauna Wood

    Price range: $4.56 through $45.60

    Ben sided his own house in thermo-spruce. That tells you something. This is the 2×4 bench board in thermally modified Nordic spruce, 1.02″ thick by 3.54″ wide, and it’s the budget-friendly bench, backrest, and skirting board. Rich amber color, tight knots, a rustic look that’s not for everybody but that a lot of people flat-out love. The thermal modification (heat and steam, no chemicals) gives it the same moisture resistance and stability you get in thermo-aspen, at a lower entry price. Strong, rot-resistant, and good for benches, backrests, and skirting. The classic move is thermo-spruce walls with thermo-aspen benches. Sold by the linear foot.

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    PROSAUNAS Thermo-Aspen 2X4 S4SEE SHP Bench, Backrest & Skirting – Sauna Wood

    Price range: $6.15 through $61.45

    A clean, comfortable bench board in the everyday width. Thermo-aspen milled at 2×4, surfaced on all four sides with eased edges so there is nothing sharp where you sit, 3.54″ wide and 1.1″ thick. Aspen does not bleed resin, does not splinter, and sits cool under bare skin even when the room is hot. The thermal modification, heat and steam and nothing else, takes it to a golden brown and stops the movement that opens gaps over the years. Aspen is the bench wood we sell more of than any other. Sold by the linear foot.

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    PROSAUNAS Thermo-Aspen 1X5 T&G STS4 Wall Cladding – Sauna Wood

    Price range: $6.76 through $67.58

    A little more width, a little more calm. The 1×5 STS4 in thermo-aspen is a tongue-and-groove board, 0.59″ thick, milled 4.72″ wide for 4.3″ of coverage per row, so the wall reads with fewer seams across a given run. The thermal modification gives it a warm golden-brown tone all the way through, so cut ends match the face. Knot-free, no resin, stays cool to the touch. A clean choice when you want a broad, quiet wall. Sold by the linear foot.

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    PROSAUNAS Thermo-Aspen 1X4 T&G STS4 Wall Cladding – Sauna Wood

    Price range: $4.38 through $43.78

    A clean, classic sauna wall in the cladding width most builders start with. The 1×4 STS4 in thermo-aspen is a tongue-and-groove board, 0.59″ thick, milled 3.54″ wide for 3.1″ of coverage per row. The thermal modification takes it to a warm golden-brown that runs all the way through, so trimmed ends match the face and nothing reads as patchwork. Knot-free, no resin, stays cool against bare skin. Easy to run floor to ceiling and easy to pair with a contrasting bench or trim. Sold by the linear foot.

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    PROSAUNAS Thermo-Aspen Groove-S 1X3 T&G Wall Cladding – Sauna Wood

    Price range: $5.98 through $59.84

    Narrow boards, strong lines, a wall that looks expensive. The Groove-S in thermo-aspen is a precision-milled 1×3 T&G cladding, 0.59″ thick, with a tight shadow groove that turns an ordinary sauna wall into something with real visual snap. At 2.1″ coverage per board, you get a lot of linear rhythm per square foot. The thermo-aspen color, warm golden-brown, runs all the way through, so trimmed ends match the face and nothing reads as patchwork. Knot-free, no resin, stays cool. Pairs well with thicker profiles as a contrast element. Sold by the linear foot.

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    PROSAUNAS Thermo-Aspen Grace™ 2X3 T&G Wall Cladding – Sauna Wood

    Price range: $4.60 through $45.98

    Shadow grooves, thick boards, and a little architecture on your walls. The Grace 2×3 in thermo-aspen is a wide-reveal T&G wall cladding, 1.06″ thick with a 2.2″ coverage per board, designed to make a sauna wall look like a deliberate design choice instead of just paneling. The broad shadow groove between boards catches the light differently than a standard V-joint and gives the room depth. Thermal modification (heat and steam, no chemicals) locks in a warm golden-brown that won’t fade from humidity and won’t gap from moisture cycling. A real statement wall, without the pretension. Sold by the linear foot.

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    PROSAUNAS Thermo-Aspen 2X2 VA Outside Corner Trim – Sauna Wood

    Price range: $3.15 through $25.23

    An outside corner with no raw edge showing. The thermo-aspen VA outside corner trim, 1.1″ on both faces, wraps the 90-degree exterior angle where two cladded walls meet and gives you a clean, mitered line in matching wood. Thermally modified aspen, so the golden-brown color runs all the way through, cut ends look the same as the face, and the piece won’t swell or bow in a wet sauna environment. No resin, no splinters. If you have a sauna room with an exterior corner (a bump-out, a partition, a two-room build), this is what goes there. Sold by the linear foot.

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    PROSAUNAS Thermo-Aspen 2X2 S4SEE SHP Moulding & Trim – Sauna Wood

    Price range: $3.34 through $33.40

    Moulding that actually does something. The thermo-aspen 2×2 S4SEE SHP moulding at 1.1″ x 1.63″ is the piece you reach for when you need to cap a bench edge, cover a gap at the ceiling, frame a light channel, or add a clean horizontal break on a cladded wall. It’s the same thermal modification as the rest of our thermo-aspen line: heat and steam, no chemicals, golden-brown color all the way through, no warp, no resin, cool under bare skin. Available up to 10-foot lengths. Sold by the linear foot.

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    PROSAUNAS Thermo-Aspen 1X2 SI Inside Corner Trim – Sauna Wood

    Price range: $1.58 through $12.65

    Inside corners are where a finish job either looks done or looks almost done. The thermo-aspen SI inside corner trim, 0.55″ thick by 1.18″ wide, fits into the 90-degree seam where two cladded walls meet and gives you a clean, furniture-quality line instead of a butt joint. The thermal modification means the golden-brown color runs all the way through, so a cross-cut end won’t show pale raw wood. No resin, no splinters. Match it to your thermo-aspen walls and benches and the room reads as one continuous material. Sold by the linear foot.

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    PROSAUNAS Thermo-Aspen 1X2 UK Door Trim – Sauna Wood

    Price range: $3.15 through $25.23

    The detail that ties the room together. Thermo-aspen door trim in the UK profile finishes the gap between your cladding and the door frame with the same golden-brown wood you used on the walls. Thin at 0.47″, wide enough at 1.65″ to cover a clean reveal. No resin, no splinters, cool to the touch. Because it’s thermally modified, the color runs all the way through, so a mitered corner or an end cut won’t show pale raw wood. If you’ve gone with thermo-aspen walls and benches, this is the piece that makes it look intentional.

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    PROSAUNAS Thermo-Aspen 3X3 S4SEE SHP Bench, Backrest & Skirting – Sauna Wood

    Price range: $11.62 through $92.96

    Bench legs that don’t need to be babied. The 3×3 thermo-aspen is a glulam engineered bench support, 2.68″ square on both faces, built to carry weight in a wet, hot room for years without moving. Same thermal modification as everything else in our thermo line: heat and steam, no chemicals, golden-brown color that runs all the way through the wood. Strong, stable, and cool to the touch. Order your bench boards and these together and the whole system ships as one delivery. Sold by the linear foot, free samples available.

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    PROSAUNAS Thermo-Aspen 2X6 S4SEE SHP Bench, Backrest & Skirting – Sauna Wood

    Price range: $11.89 through $118.92

    The bench wood we have the most opinions about. Thermally modified aspen, milled wide at 2×6 so a bench or backrest reads as one clean surface. Aspen doesn’t bleed resin, doesn’t splinter, and sits cool under bare skin even when the room is ripping. The thermal modification (heat and steam, nothing else) takes it to a golden brown and stops the expansion that opens gaps over the years. Aspen is the wood we sell more of than any other, season after season. Pair it with thermo-aspen or thermo-spruce walls for the matched look.

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    PROSAUNAS Thermo-Aspen 2X3 S4SEE SHP Bench, Backrest & Skirting – Sauna Wood

    Price range: $4.22 through $42.25

    Narrow bench board, long track record. Thermo-aspen at 2×3 is what most Scandinavian builders reach for when they want a clean, knot-free seat that won’t gap or warp over the years. The thermal modification (heat and steam, nothing else) turns plain aspen into a golden brown that reads as traditional to American eyes, then locks the wood so it can’t hold moisture and won’t move on you. No resin, no splinters, cool under bare skin. Thermo-aspen is the wood we reach for first, and we’d put this board in our own sauna without a second thought. Sold by the linear foot, free samples available. Questions?

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    PROSAUNAS Prehung Douglas Fir Sauna Door with Insulated Glass

    Price range: $1,490.00 through $1,812.00

    Handcrafted in Minnesota from solid Douglas Fir with a natural Hemlock jamb, this prehung PROSAUNAS sauna door features insulated dual‑pane tempered glass and self‑closing hinges to keep heat in while flooding your sauna with natural light. Now available in four sizes—24″, 26″ (NEW), 30″, and ADA‑width 36″—each pre‑assembled in a durable frame for speedy, precise installation.

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    Modern, Thermally Modified Magnolia — STS10 Shadow‑Line Wall Paneling

    Price range: $9.36 through $671.56

    Thermally modified magnolia sauna wood with the STS10 shadow-line profile for wide-plank sauna walls and ceilings. Choose 1×6 (5.4″ face coverage) or 1×7 (6.4″ face coverage); both .59″ thick, smooth and unoiled, installed with hidden staples. Free samples available.

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    Dark Thermo-Alder Wall Paneling 1×4 STS4 – Intense Thermal Modification Sauna Wood by Thermory

    Price range: $4.25 through $249.90

    Thermal modification darkens wood, and intense thermal modification darkens wood even more.  It also takes the benefits of thermal modification to the next level.

    1×4 Dark Thermo-Alder is an exceptional sauna wall material that can be installed vertically or horizontally.  The natural brown tone provides a classic, upscale sauna look.  Thermally modified alder is one of the best-performing sauna woods, with a warm tone, unbeatable performance, and timeless appeal.  The minimal expansion and contraction of Dark Thermo-Alder allows for tight, seamless transitions without molding.

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    Prebuilt Sauna Bench Modules

    $327.60

    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.

    Aspen Sauna Wall Cladding — STS4 — 1×5 — Plain Aspen (Not Thermally Modified)

    Price range: $5.08 through $304.80

    Premium plain Aspen wall cladding — STS4 profile — smooth, resin-free, and cool to the touch. Not thermally modified.

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    Aspen Sauna Bench Boards — SHP — 5/4×4 — Plain Aspen (Not Thermally Modified)

    Price range: $6.87 through $274.00

    Plain Aspen SHP bench boards—smooth, comfortable, and cool to the touch. Aspen’s pale grain resists splintering and resin. Not thermally modified.

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    PROSAUNAS Small Himalayan Salt Kit | Genuine Himalayan Sauna Light Kit

    Price range: $929.00 through $1,529.00

    Designed to be operated using the digital sauna control unit that operates your sauna heater or conventional on/off switch, this Universal Himalayan Salt Light Feature creates a tranquil and relaxing atmosphere that will enhance your sauna experience.

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    1X4 Black Thermo-Spruce STS4 T&G Wall Cladding – Brushed & Waxed Black Sauna Wood by Thermory

    Price range: $4.27 through $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.

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    ProSaunas Adustable Air Hatch In Thermo-Aspen

    $88.00

    This ventilation exhaust hatch by PROSAUNAS regulates airflow out of the sauna, ensuring good heat. Proper venting aids in keeping your sauna fresh and smelling clean. It also ensures your heater will perform as intended while meeting warranty requirements. Natural Thermo-Aspen wood offers a non-toxic, light-weight, eco-friendly material. This is also the ideal intake vent to use above a heater for mechanical downdraft ventilation.

    Fixed Sauna Vent in Thermo-Aspen

    $88.00

    This ventilation grille by PROSAUNAS helps introduce fresh air into your sauna experience. This helps eliminate fatigue as well as induce relaxation. Thermo-Aspen wood is durable, lightweight, non-toxic.

    5/4 x 4 SHP Alder Bench, Backrest, and Skirt Sauna Wood

    Price range: $5.46 through $246.00

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

    Price range: $4.10 through $246.00

    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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    1X4 Thermo-Aspen STS4 T&G Wall Cladding – Thermally Modified Sauna Wood by Thermory

    Price range: $4.52 through $271.20

    Thermally Modified Aspen (TASP) is an elegant wall and ceiling cladding for saunas that has been meticulously processed using only heat and steam by Thermory, the global leader in Thermal Modification.  The result is a darkened, smooth wood that won’t shrink, warp, cup, or rot when properly installed.  Choose this profile for a classic sauna look that’s more refined than typical North American saunas.

    Working with Tongue and Groove STS4 is a delight for contractors and DIY Sauna Builders alike.  We’re not exagerating that every builder we work with has found the quality and consistency to be truly remarkable.  At Sauna Marketplace, we make it easy with matching benches, backrests, bench skirts, vent hatches, floor grids, and more.

    Actual wall coverage is 3.1″ to 3.2″ depending on installation.

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    Sauna Foil Radiant Barrier PROSAUNAS 128938 – 48 in × 80 ft Roll | Pure-Aluminum Radiant & Moisture Shield for Saunas, Basements, Crawl Spaces & More

    $92.90

    Building a sauna that feels as good as it looks starts behind the wood. The ProSaunas 48-inch × 80′ (320 sq foot) Vapor Barrier Foil is a pure-aluminum radiant shield and Class I vapor retarder in one, reflecting up to 97 % of radiant heat back into the room while blocking moisture from entering your wall cavity. Each 320 sq ft roll lays flat, tapes tight, and withstands sauna-level temperatures without the bubble-wrap “sag-and-melt” you’ll find at big-box stores. Whether you’re a DIY homeowner or a pro builder, this heavy-duty foil gives you more even temperatures, lower energy bills, and a structure that lasts. Upgrade your sauna (or any moisture-prone space) with the barrier trusted by serious sauna craftsmen.

    Thermo-Magnolia Wide Sauna Bench Board 5/4×8 SHP

    Price range: $18.26 through $730.40

    These extra-wide bench boards in exquisite thermo-magnolia will add a touch of comfort while enhancing the look of your home.  The rich, dark shade is achieved by thermal modification giving magnolia an exclusive, stately finish.  Create your dream sauna or high-end sauna space.

    If you want to something a little ‘extra’, we think this is the most premium sauna bench material on the market.  Magnolia has attractive grain patterns, low thermal conductivity, and resists warping and cupping making it perfect as a wide-plank premium sauna bench material that won’t splinter.  This is also the widest plank sauna bench material available in North America, coming in at 7.3″ of actual width.

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    Dark Thermo-Alder 5/4×4 SHP Bench, Backrest, and Skirt Sauna Wood – Intense Modification by Thermory

    Price range: $5.88 through $235.00

    Dark Thermo-Alder 5/4 SHP Bench material is a perfect choice for sturdy, warm-tone benches that are smooth to the touch.  This dark-tone thermo-aspen is more brown and woodsy looking than thermo-aspen.  Ideal for a more traditional cabin-sauna or cottage feel.

    5/4×4 Bench Boards are an easy and low-cost way to build a premium sauna bench framed with standard 2x4s and decked with these 1.1″ thick boards horizontally or vertically.  See below for our framing suggestion.

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    Dark Thermo-Alder Wall Paneling 1×5 STS4 – Intense Thermal Modification Sauna Wood by Thermory

    Price range: $6.87 through $412.20

    Thermal modification darkens wood, and intense thermal modification darkens wood even more.  It also takes the benefits of thermal modification to the next level.

    Wide plank 1×5 thermo-alder is an exceptional sauna wall material that can be installed vertically or horizontally.  The natural brown tone provides a classic, upscale sauna look.  Thermally modified alder is one of the best-performing sauna woods, with a warm tone, unbeatable performance, and timeless appeal.  The minimal expansion and contraction of Dark Thermo-Alder allows for tight, seamless transitions without molding.

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    Thermo-Spruce Sauna Bench and Floor Wood – 5/4 SHP Sauna Wood By Thermory

    Price range: $5.55 through $222.00

    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.

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    1X4 Thermo-Spruce STS4 T&G Wall Cladding – Thermally Modified Sauna Wood by Thermory

    Price range: $2.50 through $150.00

    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.

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    Thermory 5/4×4 SHP Thermo-Alder Bench, Backrest, and Skirt Sauna Wood

    Price range: $6.09 through $243.00

    Thermo-Alder 5/4 SHP Bench material is a great choice for sturdy, warm-tone benches that are smooth to the touch.  This mid-tone thermo-aspen is more brown and woodsy looking than thermo-aspen.  Ideal for a more traditional cabin-sauna or cottage feel (an even darker, intensely modified thermo-alder is also available).

    5/4×4 Bench Boards are an easy and low-cost way to build a premium sauna bench framed with standard 2x4s and decked with these 1.1″ thick boards horizontally or vertically.  See below for our framing suggestion.

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    Thermory 1×4 SHP Thermo-Alder Bench, Backrest, and Skirt Sauna Wood

    Price range: $4.96 through $243.04

    Thermo-Alder 1×4 SHP Bench material is a popular choice for sauna benches, backrests, and skirting.  This mid-tone is more brown and woodsy looking than thermo-aspen.  Great for a more traditional cabin-sauna or cottage feel.

    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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    Thermo-Alder Wall Paneling 1×5 STS4 – Sauna Wall and Ceiling Wood By Thermory

    Price range: $5.41 through $324.60

    Wide plank 1×5 thermo-alder is an exceptional sauna wall material that can be installed vertically or horizontally.  The natural brown tone provides a classic, upscale sauna look.  Thermally modified alder is one of the best-performing sauna woods, with a warm tone, unbeatable performance, and timeless appeal.  The minimal expansion and contraction of Thermo-Alder allows for tight, seamless transitions without molding.

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    Alder Wall To Wall Flat T Transition Trim

    $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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    Alder Moulding 1×1 SI Sauna Ceiling Trim By Thermory

    Price range: $2.00 through $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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    Alder Moulding 1×1 SHP Sauna Trim, Floor, and Bench Wood By Thermory

    Price range: $2.00 through $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 5/4×3 STEP Wall Cladding – Sauna Wood by Thermory

    Price range: $3.72 through $145.82

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

    Price range: $6.52 through $391.20

    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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    1X5 Alder STS4 Wall Cladding – Natural Sauna Wood by Thermory

    Price range: $5.41 through $324.60

    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

    Price range: $3.62 through $217.20

    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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    Thermory 5/4 SHP Thermo-Aspen Sauna Bench and Floor Wood

    Price range: $5.70 through $228.00

    Thermory Thermo-Aspen 5/4 (previously called 2×4) SHP Bench material is the perfect smooth, cool timber to feel against bare skin.  Because it doesn’t secrete resin, splinter or overheat, aspen makes for an ideal sauna material. The color of thermally modified aspen is an attractive golden brown.  Thermally modified wood resists rotting, expansion, contraction, warping, and cupping. Recommended Uses: Sauna benches, backrests, flooring, and skirting.

    These 1.1″ thick sauna bench boards are thick enough to build the frame, but we recommend using standard 2x4s for that.  See detail below.

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    Thermory 1×4 SHP Thermo-Aspen Bench, Backrest, and Skirt Sauna Wood

    Price range: $5.09 through $254.50

    Thermory Thermo-Aspen 1×4 SHP Bench material is the perfect smooth, cool timber to feel against bare skin.  Because it doesn’t secrete resin, splinter or overheat, aspen makes for an ideal sauna material. The color of thermally modified aspen is an attractive golden brown.  Thermally modified wood resists rotting, expansion, contraction, warping, and cupping. 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 either horizontally or vertically.  See below for our framing suggestion.

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    Black Aspen Indoor Sauna Windows by Thermory

    Price range: $295.00 through $495.00

    Indoor windows from Thermory are stylish, versatile, modern. Ideal for any commercial sauna or modern home. These tall transom windows bring a touch of contemporary class to your
    interior spaces with Thermory quality. Practical and easy on the eye in equal measure, the windows are available in two size options with black aspen frames and single-glazed tempered gray glass that offers shade and privacy. They are also suitable for use in damp environments, making them perfect for adding visual appeal to a home sauna or spa.

    Select options This product has multiple variants. The options may be chosen on the product page

    Thermo-Aspen 1×4 VIRE Wall Cladding – Sauna Wood by Thermory

    Price range: $4.31 through $258.60

    Add some life to your sauna with Thermory Vire 1×4, a unique contoured cladding for sauna walls and ceilings.  This is also a favorite for adjascent walls the sauna, or for building a hidden door into a wood wall!

    Thermo-Aspen is an elegant wall and ceiling cladding for saunas that has been meticulously processed using only heat and steam by Thermory, the global leader in Thermal Modification.  The result is a darkened, smooth wood that won’t shrink, warp, cup, or rot when properly installed.  Choose this profile for a warm, modern sauna that’s design forward.

    At Sauna Marketplace, we make it easy with matching benches, backrests, bench skirts, vent hatches, floor grids, and more.

    Actual wall coverage is 3.1″.

    Select options This product has multiple variants. The options may be chosen on the product page

    Thermo-Aspen 1×4 KYTE Wall Cladding – Motion Panels by Thermory

    Price range: $4.62 through $277.20

    Step up your game and build the sauna of your dreams with Kyte Cladding by Thermory.  The subtle bump out is easy to work with, but adds intrigue and a custom look to sauna walls and ceilings.  It’s great look for public saunas, or anyone who wants to something a little different than standard tongue and groove.

    Thermo-Aspen is an elegant wall and ceiling cladding for saunas that has been meticulously processed using only heat and steam by Thermory, the global leader in Thermal Modification.  The result is a darkened, smooth wood that won’t shrink, warp, cup, or rot when properly installed.  Choose this profile for a modern sauna that still feels traditional.  Kyte walls can also be harnessed with basic lighting strips behind the benches to creat intrigue and shadow effects.

    At Sauna Marketplace, we make it easy with matching benches, backrests, bench skirts, vent hatches, floor grids, and more.

    Actual wall coverage is 3.1″.

    Select options This product has multiple variants. The options may be chosen on the product page

    Thermo-Aspen 5/4×3 STEP Wall Cladding – Sauna Wood by Thermory

    Price range: $4.48 through $179.20

    Step up your game and build the sauna of your dreams with 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.

    Thermo-Aspen is an elegant wall and ceiling cladding for saunas that has been meticulously processed using only heat and steam by Thermory, the global leader in Thermal Modification.  The result is a darkened, smooth wood that won’t shrink, warp, cup, or rot when properly installed.  Choose this profile for a classic sauna look that’s more refined than typical North American saunas.

    At Sauna Marketplace, we make it easy with matching benches, backrests, bench skirts, vent hatches, floor grids, and more.

    Actual wall coverage is 2.2″ which completes the step.

    Select options This product has multiple variants. The options may be chosen on the product page

    1X5 Thermo-Aspen STS4 Wall Cladding – Thermally Modified Sauna Wood by Thermory

    Price range: $6.18 through $370.80

    Wide plank Thermally Modified Aspen (TASP) is an elegant wall and ceiling cladding for saunas that has been meticulously processed using only heat and steam by Thermory, the global leader in Thermal Modification.  The result is a darkened, smooth wood that won’t shrink, warp, cup, or rot when properly installed.  Choose this profile for a classic sauna look that’s more refined than typical North American saunas.

    Working with Tongue and Groove STS4 is a delight for contractors and DIY Sauna Builders alike.  We’re not exagerating that every builder we work with has found the quality and consistency to be truly remarkable.  At Sauna Marketplace, we make it easy with matching benches, backrests, bench skirts, vent hatches, floor grids, and more.

    Actual wall coverage is 4.3″.

    Select options This product has multiple variants. The options may be chosen on the product page

    Prebuilt Bench Skirt by Thermory

    $275.00

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