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1X5 Brushed Black Alder STS4 Wall Cladding – Sauna Wood by Thermory
$6.52 per linear footFree samples availableLooking 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.
1X5 Alder STS4 Wall Cladding – Natural Sauna Wood by Thermory
$5.41 per linear footFree samples availableWide 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″.
Black Aspen Indoor Sauna Windows by Thermory
Price range: $295.00 through $495.00Indoor 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.
Thermo-Aspen 1×4 VIRE Wall Cladding – Sauna Wood by Thermory
$4.31 per linear footFree samples availableAdd 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 the walls next to 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″.
Thermo-Aspen 5/4×3 STEP Wall Cladding – Sauna Wood by Thermory
$4.48 per linear footFree samples availableStep 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.
Prebuilt Bench Skirt by Thermory
$275.00It’s easier than ever to complete your sauna with a prebuilt sauna bench skirt in thermally modified Aspen or Alder.
Wood Headrest in Thermal Aspen by Thermory
$91.00Match your aesthetic of an all Thermory sauna with a classic thermo-aspen wooden headrest. Aspen is an ideal sauna material because it doesn’t secrete resin, create splinters, or get too hot. The color of thermo-aspen is an attractive golden brown.
Thermory Prebuilt Sauna Backrest
$330.00Ready-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.
Thermo-Aspen Moulding 1×2 Transition T by Thermory
$2.36 per linear footFree samples availableNeed 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.
Thermo-Aspen Moulding 1×1 SI Sauna Ceiling Trim By Thermory
$2.00 per linear footFree samples availableThermory 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.
Thermory Modern Black Sauna Door | Premium Aspen
$1,195.00It’s here! A premium, modern black sauna door from Thermory. With gray glass, sleek black hardware, and painted alder frame. This door contrasts beautifully with any sauna aesthetic. Arrives pre-hung in a reversible frame, making the installation a breeze.
ProSaunas All-Glass Sauna Door
Price range: $759.05 through $998.75Get 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.
Thermo-Aspen Sauna Floor Grid
$249.00Say 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)
Sauna Stool or Step in Thermo-Aspen
$419.00This versatile stool can act as a moveable sauna bench, first step, or changing room seat. It measures 5.5 x 15.7 x 27.6 in.
Custom DIY Sauna Package
You bring the framed, insulated room. We work out the cladding, bench material, radiant barrier, vents, and small pieces that turn it into a sauna. Configure the room below and choose Invoice Me at checkout so we can review the dimensions, available material, and timeline with you before the package is finalized. A bucket, ladle, headrest, thermometer, hygrometer, samples, and project support are part of the process.
Thermory Adjustable Sauna Vent Hatch
Price range: $69.00 through $84.00Sliding wooden sauna ventilation hatch in Alder, Aspen or Thermo-Aspen. Overall size: 11.1 in wide × 5.2 in high × 0.5 in deep.
Vent cover only. Ductwork, fans and a complete ventilation system are not included.
Thermory Fixed Sauna Vent Grille
Price range: $55.00 through $84.00Fixed wooden sauna ventilation grille in Alder, Aspen or Thermo-Aspen. Overall size: 7.5 in wide × 5.9 in high × 0.5 in deep.
Vent cover only. Ductwork, fans and a complete ventilation system are not included.
SaunaLife X7 Sauna Floor | European Aspen, Pre-Assembled
$295.00Standing barefoot on a cold slab is the fastest way to undo a hot room. The X7 floor is SaunaLife’s aspen decking for their Model X7 indoor sauna: pre-assembled, 31.4 inches by 28.3 inches, sitting 5.5 inches up so air and water pass underneath instead of pooling under your feet. Aspen is the traditional choice for anything skin touches in a sauna because it stays cool to the touch when everything around it is not.
SaunaLife X6 Sauna Floor | European Aspen, Pre-Assembled
$425.00Standing barefoot on a cold slab is the fastest way to undo a hot room. The X6 floor is SaunaLife’s aspen decking for their Model X6 indoor sauna: pre-assembled, 24.4 inches by 22.4 inches, sitting 5.5 inches up so air and water pass underneath instead of pooling under your feet. Aspen is the traditional choice for anything skin touches in a sauna because it stays cool to the touch when everything around it is not.
Thermory Sauna Door | Premium, Thermo Aspen frame
$1,095.00The most trusted sauna door in Europe is now available in North America! Thermory is the global leader in sustainable wood products, and known for sauna material and products. Their glass doors are beautifully framed in by some of their most popular sauna woods: alder, thermo-aspen, and aspen. The choice is yours.
It’s also available in with a wood handle or ‘premium’ hardware kit but we think the basic wood option is just as nice. With either option, the hinges are commercial grade to European standards and adjustable to get a perfect seal. These doors promote an inviting welcome to your sauna.
Contact Sauna Marketplace for additional finishes and custom options, including Thermory’s new black trendline, premium, and classic black sauna doors.
Thermory Thermo-Aspen 2×2 VA
Price range: $3.15 through $31.50
Thermo-Aspen Moulding 1×1 SHP Sauna Trim, Floor, and Bench Wood By Thermory
$2.00 per linear footFree samples availableThermory 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.
PROSAUNAS Thermo-Aspen 1X5 T&G STS4 Wall Cladding – Sauna Wood
$6.76 per linear footFree samples availableA 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.
PROSAUNAS Alder 1X5 T&G STS4 Wall Cladding – Sauna Wood
$6.55 per linear footFree samples available
PROSAUNAS Thermo-Aspen Grace™ 2X3 T&G Wall Cladding – Sauna Wood
$4.60 per linear footFree samples availableShadow 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.
PROSAUNAS Thermo-Aspen 2X4 S4SEE SHP Bench, Backrest & Skirting – Sauna Wood
$6.15 per linear footFree samples availableA 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.
PROSAUNAS Thermo-Spruce 1X4 T&G STS4 Wall Cladding – Sauna Wood
$2.35 per linear footFree samples availableThe 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.
PROSAUNAS Thermo-Aspen 1X2 UK Door Trim – Sauna Wood
$3.15 per linear footFree samples availableThe 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.
PROSAUNAS Thermo-Aspen 2X6 S4SEE SHP Bench, Backrest & Skirting – Sauna Wood
$11.89 per linear footFree samples availableThe 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.
PROSAUNAS Thermo-Aspen 2X3 S4SEE SHP Bench, Backrest & Skirting – Sauna Wood
$4.22 per linear footFree samples availableNarrow 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?
PROSAUNAS Thermo-Spruce 2X4 S4SEE SHP Bench, Backrest & Skirting – Sauna Wood
$3.88 per linear footFree samples availableBen 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.
PROSAUNAS Thermo-Aspen 1X2 SI Inside Corner Trim – Sauna Wood
$1.58 per linear footFree samples availableInside 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.
PROSAUNAS Thermo-Aspen 2X2 S4SEE SHP Moulding & Trim – Sauna Wood
$3.74 per linear footFree samples availableMoulding 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.
PROSAUNAS Thermo-Aspen 2X2 VA Outside Corner Trim – Sauna Wood
$3.15 per linear footFree samples availableAn 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.
PROSAUNAS Aspen Midnight Black 1×4 (0.59 in x 3.5 in) T&G STS4
$7.34 per linear footFree samples availablePROSAUNAS Aspen Midnight Black tongue and groove 1×4 STS4 profile creates a striking contrast and is recommended for sauna walls and ceilings. This black-wax finished cladding is perfect for creating a dynamic, contemporary look. When paired as an accent wall with different bench and surface woods, its smooth black appearance will complement the lighter materials.
PROSAUNAS Thermo-Aspen 1X4 T&G STS4 Wall Cladding – Sauna Wood
$4.38 per linear footFree samples availableA 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.
PROSAUNAS Thermo-Aspen Groove-S 1X3 T&G Wall Cladding – Sauna Wood
$5.98 per linear footFree samples availableNarrow 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.
PROSAUNAS Thermo-Aspen 3X3 S4SEE SHP Bench, Backrest & Skirting – Sauna Wood
$11.62 per linear footFree samples availableBench 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.
PROSAUNAS Alder 2X4 S4SEE SHP Bench, Backrest & Skirting – Sauna Wood
$5.24 per linear footFree samples available
PROSAUNAS Alder 1X4 T&G STS4 Wall Cladding – Sauna Wood
$4.00 per linear footFree samples available
PROSAUNAS Aspen 2X4 S4SEE SHP Bench, Backrest & Skirting – Sauna Wood
$6.68 per linear footFree samples available
PROSAUNAS Aspen 1X5 T&G STS4 Wall Cladding – Sauna Wood
$6.68 per linear footFree samples available
PROSAUNAS Spruce 1X4 T&G STS4 Wall Cladding – Sauna Wood
$1.33 per linear footFree samples availableThe most economical real sauna wood we carry, and the traditional one. Natural Nordic 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.
PROSAUNAS Hemlock 1/2X4 VG T&G V2E Wall Cladding – Sauna Wood
$4.00 per linear footFree samples availablePale walls, tight joints, almost no smell. This is Hemlock 1/2×4 VG T&G V2E wall cladding: clear A+ grade, 0.44″ thick, 3.49″ of coverage per board, V-joint profile, milled in Canada. If cedar is the sauna your grandfather built, hemlock is the sauna you’d design today. Quiet, bright, modern. It’s the cladding choice for a contemporary build that wants clean pale walls and a room that doesn’t smell like the wood. Ben likes the hemlock look. The honest note: hemlock walls will shift to a slight yellow tint under artificial light over time, more noticeable in rooms without natural light. For the brightest long-term pale look, our thermo-aspen cladding stays truer. Sold by the linear foot.
PROSAUNAS Western Red Cedar 1X4 STK T&G V2E Wall Cladding – Sauna Wood
$2.64 per linear footFree samples availableThe knottier option, and honestly the one with more character. This is Western Red Cedar 1×4 tongue-and-groove V2E wall cladding in STK grade, milled in Canada with natural tight knots and a warm reddish tone. At 0.70″ thick with a 2.95″ coverage width, it goes up fast and smells like every sauna movie you’ve seen. STK means you’ll have knots: they’re tight, they’re natural, and they give the room a sauna-honest feel that clear boards don’t. We carry a clear VG grade too if that’s your look. One heads-up: like all untreated cedar, this will move a little through the heat-and-cool cycle over the years. Sold by the linear foot.
PROSAUNAS Aspen Groove-S 1X3 T&G Wall Cladding – Sauna Wood
$5.87 per linear footFree samples availableNarrow boards, crisp shadow lines, a lot of personality in a small footprint. The Groove-S is a 1×3 tongue-and-groove in natural aspen: 0.59 in thick, 2.4 in wide, 1.9 in of coverage per board, with precision-milled fluted slats that give a wall real visual texture. Aspen means pale, cool, resin-free. This profile means the room looks like a decision was made, not just a box lined with boards. Sold by the linear foot in 1, 5, and 10 ft lengths.
PROSAUNAS Aspen Grace™ 2X3 T&G Wall Cladding – Sauna Wood
$4.81 per linear footFree samples availableYou won’t find this profile from most mills. Grace is a wide-grooved designer tongue-and-groove, 1.1 in thick and 2.5 in wide, with a 2.2 in coverage and a shadow reveal that reads architectural rather than just “sauna wall.” It’s aspen, so the tone is pale, the surface is resin-free and smooth, and the room stays bright. We carry Grace because when a customer wants a contemporary room that looks considered, not just lined, this is what gets them there. Sold by the linear foot in lengths from 1 to 10 ft.
PROSAUNAS Aspen 1X4 T&G STS4 Wall Cladding – Sauna Wood
$4.41 per linear footFree samples availableThe Scandinavian default, and ours too. This is natural aspen tongue-and-groove wall cladding, STS4 profile, milled in Estonia at 0.59 in thick and 3.5 in wide with 3.1 in of coverage per board. Pale, bright, no resin, no splintering, and cool to the touch even when the room is running at full temperature. We sell more aspen than any other wood, year after year, because it works: it reads clean in any lighting, it pairs with every heater finish, and nobody is allergic to it. Sold by the linear foot in lengths from 1 to 10 ft.
PROSAUNAS Alder Grace™ 2X3 T&G Wall Cladding – Sauna Wood
$4.81 per linear footFree samples availableThe wall profile that makes people stop and ask what species that is. Grace is a wide tongue-and-groove with a precision shadow reveal, and in natural alder the warm reddish-brown tone makes those grooves pop. Each board is 2.52" wide with 2.2" net coverage, milled in Estonia to 1.06" thick. Dramatic for a wall, clean for a ceiling, honestly different from the usual sauna paneling. Pairs with any alder bench board for a matched room. Sold by the linear foot in 1 and 8 ft lengths.
PROSAUNAS Western Red Cedar 1/2X4 VG T&G V2E Wall Cladding – Sauna Wood
$6.15 per linear footFree samples availableFor years we steered people away from cedar. Then a clear vertical-grain run came through worth carrying. This is Western Red Cedar 1/2×4 with a V-joint, knot-free A+ grade, milled for sauna walls and ceilings. It’s the wood Americans picture when they picture a sauna: the warm reddish tone, the aroma that shows up the second the room heats. We carry it for the look-and-smell buyer who wants the classic done right, and we’ll tell you straight where thermo wood holds up better. Sold by the linear foot.
Prebuilt
Brushes, Whisks and Body Care
Vents