Everything inside the sauna, and everything behind the wood. Cladding and bench boards, trim, vents and doors.

Most of what we ship is thermally modified, which means heat and steam and nothing else, no chemicals. A properly installed board will not shrink, warp, cup or rot in a hot wet room, and the color runs all the way through, so a cut end matches the face instead of flashing pale at every mitre.

The mistake we watch people make is ordering off the nominal width. A 1×4 STS4 board is milled 3.54 inches wide but covers 3.1 inches once the tongue seats. The 1×5 measures 4.72 and covers 4.3. Work your square footage off the coverage figure or you will finish a wall one row short, and that last row is never the one you want to be waiting on.

Behind the cladding goes the foil: 320 square feet a roll, reflecting up to 97 percent of radiant heat back into the room rather than into your framing. Tape the seams, overlapping the sheets rather than butting them, and plan two vents, a fixed grille in and an adjustable hatch out, which is what a heater warranty generally expects to see. Framing and mineral wool are yours to source locally.

Start with sauna wood for cladding and bench stock, then benches, doors and vents.

Call or text (844) 565-1113 with your wall dimensions and we will do the math with you.

Showing 1–50 of 104 results

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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.

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

    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.

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

    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.

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

    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.

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

    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″.

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

    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.

    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

    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.

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

    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.

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

    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.

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

    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.

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

    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.

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

    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.

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

    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.

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

    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

    Custom DIY Sauna Package

    DIY Sauna Packages allow you to get the most use of your space. Requires a framed/gutted wall with mineral wool insulation. This DIY sauna package guarantees wall coverage without defects. Comes with vent covers, radiant barrier, bucket, ladle, headrest, thermometer, and hygrometer. It also includes expert advice throughout your project. Perfect for indoor conversion or outdoor builds. We recommend selecting ‘Invoice Me’ at checkout, followed by a sauna consultation so we can rush you free samples.

    *NOTE: This particular option does not allow you to select the brand or manufacturer in advance. Sauna Marketplace selects the best available material for the project from our partners using available stock already in USA (no tariffs or delay). We will provide a detailed inventory and timeline before finalizing the order. You can cancel for a full refund before you give that final approval.

    Let’s build a sauna!

    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.

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

    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 transitions without molding.

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

    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 transitions without molding.

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

    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.

    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.

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

    Portable Sauna Bench

    $549.00

    Made with Western Red Cedar and aluminum, it’ll boost your sitting position 30″ above the ground and pick up your feet 16″. High-quality Cedar is used on the bench top to ensure a comfy sitting surface and a locking cross brace allow for sturdy legs while in use and compact portability in between uses. Two-piece construction with carrying handles allow for easy mobility. Standard length is 48″ with a 16″ wide bench top. Length can be customized if desired.

    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.

    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 cleanly with degree fan-modules that be nearly impossible to build on site.

    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.

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

    Price range: $4.00 through $40.03
    Select options This product has multiple variants. The options may be chosen on the product page

    PROSAUNAS Alder 1X5 T&G STS4 Wall Cladding – Sauna Wood

    Price range: $6.54 through $65.45
    Select options This product has multiple variants. The options may be chosen on the product page

    PROSAUNAS Alder 2X4 S4SEE SHP Bench, Backrest & Skirting – Sauna Wood

    Price range: $5.24 through $52.36
    Select options This product has multiple variants. The options may be chosen on the product page

    ProSaunas All-Glass Sauna Door

    Price range: $893.00 through $1,175.00

    Get the European all-glass sauna door that’s engineered for beauty, performance, and ease of installation. ProSaunas glass sauna doors come prehung and ready to install with reversible hinges.

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

    ProSaunas Aluminum Foil Sauna Tape 129725 | 2 in x 164 ft Roll

    $38.66

    The foil goes up fast. It is the seams that leak. This is the tape that closes them: aluminum foil tape made for sauna heat, 2 in wide and 164 ft on the roll. Run it over every overlap between sheets and around each cut you make for the heater feed, light wiring and vents, and your vapor barrier behaves like one continuous surface instead of a wall full of small gaps. We would not put a general-purpose duct tape in a hot room. Pairs with the ProSaunas Sauna Foil Radiant Barrier, 48 in x 80 ft.

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

    Price range: $6.68 through $66.81
    Select options This product has multiple variants. The options may be chosen on the product page

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

    Price range: $6.68 through $66.81
    Select options This product has multiple variants. The options may be chosen on the product page

    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.

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

    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.

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

    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.

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

    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.

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

    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.

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

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

    Price range: $2.35 through $32.96

    The most economical real sauna wood we carry, and the traditional one. Natural Nordic Thermo-Spruce, 1×4 smooth tongue-and-groove, the wood Finland has lined saunas with for generations. Light tone, tight characterful knots, a clean mild scent. It is not thermally modified, so it moves a little more than our thermo woods through the heat-and-cool cycle. We carry it for the budget build and the honest Finnish look. Sold by the linear foot, in lengths up to 14 ft.

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

    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.

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

    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. If 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.

    Sauna Stool or Step in Thermo-Aspen

    $419.00

    This versatile stool can act as a moveable sauna bench, first step, or changing room seat. Dimensions are 15.7″ x 27.6′ (140x400x700).

    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 transitions without molding.

    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 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 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

    Thermo-Aspen Moulding 1×1 SHP Sauna Trim, Floor, and Bench Wood By Thermory

    Price range: $2.00 through $200.00

    Thermory Thermo-Aspen 1×1 SHP is a versatile sauna material meant for trim, benches, internal corner moulding, and sauna floors. Aspen is a 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.

    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.

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

    Thermo-Aspen Moulding 1×1 SI Sauna Ceiling Trim By Thermory

    Price range: $2.00 through $92.40

    Thermory Thermo-Aspen 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 Thermo-Aspen.

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

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

    Thermo-Aspen Moulding 1×2 Transition T by Thermory

    Price range: $2.36 through $37.76

    Need longer boards than 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.

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

    Thermo-Aspen Sauna Floor Grid

    $249.00

    Say goodbye to cold feet! This is easiest way to add some comfort and warmth to your sauna floor. This rolling floor grid makes maintenance, cleaning, and drying out of your sauna easier than ever. Thermory’s thermal modification process ensures a long-lasting, beautiful wood finish with minimal maintenance.

    Dimensions:.55″ x 31.5″ x 35.4″ (14x800x900)

    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.

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