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    PROSAUNAS Alder 3X3 S4SEE SHP Bench, Backrest & Skirting – Sauna Wood

    Price range: $11.62 through $92.96

    The leg of the operation. This is the 3×3 glulam alder bench support, 2.68" square, engineered from natural alder for the structural parts of a sauna bench. Not a finish piece: it’s what holds everything up. Same warm reddish-brown alder, same E1 certification, milled in Estonia. At 2.68" x 2.68" (68mm x 68mm), it’s got the cross-section to handle bench loads without flex. Matches the alder bench board family if you want the whole structure in one species. Sold by the linear foot in 1 and 8 ft lengths.

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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-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.

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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.

    Thermory Adjustable Air Vent Hatch in Thermally Modified Aspen

    Price range: $69.00 through $84.00

    Adjustable Sauna Ventilation Hatch, .5″ x 5.2″ x 11″.  In Alder, Aspen, or Thermo-Aspen

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    Thermory Air Vent in Thermally Modified Aspen Wood

    Price range: $55.00 through $84.00

    Sauna Ventilation Grille, .5″ x 5.9″ x 7.5″

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    PROSAUNAS Western Red Cedar 1/2X4 VG T&G V2E Wall Cladding – Sauna Wood

    Price range: $6.15 through $79.87

    For 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.

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    PROSAUNAS Western Red Cedar 1X4 VG S4SEE Bench, Backrest & Skirting – Sauna Wood

    Price range: $7.48 through $74.80

    For years we steered people away from cedar. Then a clear vertical-grain run came through worth carrying. This is Western Red Cedar 1×4 VG S4SEE bench board, knot-free A+ grade, milled in Canada, 0.69″ thick and 3.5″ wide. It’s the bench face the classic sauna crowd wants: warm reddish tone, smooth texture, and that cedar aroma that hits you when the room heats. We waited because modern cedar quality slipped while prices climbed. We carry it now because this grade is actually worth installing. One honest note: cedar runs warmer to the touch than aspen under real heat. If cool skin contact is the priority, aspen benches with cedar walls is a better combo. 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 Aspen 2X4 S4SEE SHP Bench, Backrest & Skirting – Sauna Wood

    Price range: $6.68 through $66.81
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    PROSAUNAS Aspen 1X5 T&G STS4 Wall Cladding – Sauna Wood

    Price range: $6.68 through $66.81
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    PROSAUNAS Alder 1X5 T&G STS4 Wall Cladding – Sauna Wood

    Price range: $6.54 through $65.45
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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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    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 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 Aspen Groove-S 1X3 T&G Wall Cladding – Sauna Wood

    Price range: $5.87 through $58.77

    Narrow 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: 15mm thick, 60mm wide, 47mm 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.

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

    Price range: $5.87 through $58.73

    Ben sided his own house in thermo-spruce. That tells you something. This is the 2×6 bench board in thermally modified Nordic spruce, 1.02″ thick by 5.51″ wide, and it’s the classic budget build starting point. 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 and floors. The classic move is thermo-spruce walls with thermo-aspen benches. Sold by the linear foot.

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

    Price range: $5.24 through $52.36
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    PROSAUNAS Hemlock 1X6 VG S4SEE Bench, Backrest & Skirting – Sauna Wood

    Price range: $7.48 through $52.36

    Six inches of pale, clear hemlock bench board. This is Hemlock 1×6 VG S4SEE: 0.69″ thick, 5.44″ wide, clear A+ grade, straight grain, no knots, almost no scent. Milled in Canada. The wider face means fewer boards on a bench, fewer gaps to manage, and a surface that reads as one clean piece from where you sit. We stock hemlock now because we found a clear grade worth standing behind. The light straw color is the point: it makes a modern, neutral room feel intentional, not default. One note: wide hemlock boards can pick up a mild yellow shift under artificial light over time, more noticeable than on narrower stock. Sold by the linear foot.

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    PROSAUNAS Hemlock 1X4 VG S4SEE Bench, Backrest & Skirting – Sauna Wood

    Price range: $5.07 through $50.75

    Pale, clean, and quieter than you’d expect. This is Hemlock 1×4 VG S4SEE bench board: clear A+ grade, 0.69″ thick, 3.5″ wide, straight-grained, knot-free, milled in Canada. Hemlock has a light straw color and almost no scent, which makes it the right choice for anyone sensitive to cedar aroma or building a room with a modern, neutral look. We didn’t carry hemlock for years because we couldn’t find a supplier with clear grade we trusted. We carry this one now. One real note: hemlock can pick up a slight yellow tint under artificial light over time. If the room is well-lit with daylight it reads beautifully. Sold by the linear foot.

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

    Price range: $4.81 through $48.08

    You won’t find this profile from most mills. Grace is a wide-grooved designer tongue-and-groove, 27mm thick and 64mm wide, with a 56mm 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.

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

    Price range: $4.41 through $44.08

    The Scandinavian default, and ours too. This is natural aspen tongue-and-groove wall cladding, STS4 profile, milled in Estonia at 15mm thick and 90mm wide with 80mm 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.

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

    Price range: $4.14 through $41.40

    Bare skin at 185 degrees, and this board stays comfortable. The 2×3 aspen bench board, surfaced four sides with eased edges, is the narrow bench option: 28mm thick, 65mm wide, smooth and resin-free. It’s the right choice for a backrest, a skirting run, or a bench deck where you want slender gaps and a clean, quiet look. We sell more aspen bench wood than any other species, season after season. Sold by the linear foot in 1 and 10 ft lengths at $4.14/lf. Milled in Estonia.

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    PROSAUNAS Hemlock 1/2X4 VG T&G V2E Wall Cladding – Sauna Wood

    Price range: $4.00 through $40.07

    Pale 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.

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    PROSAUNAS Alder 2X3 S4SEE SHP Bench, Backrest & Skirting – Sauna Wood

    Price range: $4.00 through $40.07

    Sit on it for five minutes and you’ll understand why Finland has been using alder on benches for a hundred years. This is the 2×3 S4SEE bench board in natural alder, milled in Estonia to 1.1" thick by 2.56" wide, surfaced four sides with eased edges. Warm reddish-brown tone, fine grain, a faint honey scent when the room heats up. Water-repellent and stays cool against bare skin. Good clear cedar now runs nearly three times the price; alder is the honest alternative for a timeless Finnish room. Sold by the linear foot in lengths from 1 to 10 ft.

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

    Price range: $4.00 through $40.03
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    PROSAUNAS Alder Grace™ 2X3 T&G Wall Cladding – Sauna Wood

    Price range: $4.81 through $38.47

    The 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.

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    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.

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    PROSAUNAS Western Red Cedar 2X4 STK S4SEE Bench, Backrest & Skirting – Sauna Wood

    Price range: $4.67 through $37.40

    Knots and all. Western Red Cedar 2×4 STK S4SEE is the thicker bench board for the builder who wants the weight and depth of a 1.5″ seat without paying clear-grade prices. STK means Select Tight Knot: the knots are natural, tight, and part of the character. At 3.5″ wide and 1.5″ thick, this is a substantial bench board with a real cedar look. The aroma is there, the reddish grain is there, and the lower price point makes a full bench build more realistic. Honest downside: the knots and the STK-grade movement mean these boards gap a bit more than clear VG over the years. Milled in Canada. Sold by the linear foot.

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

    Price range: $3.60 through $36.07

    28mm square, eased edges, four smooth faces. The aspen 2×2 S4SEE moulding is the heavier finishing piece: thicker than the 1×1 at 1.1″ square, with enough visual presence to anchor a ceiling line or a bench-frame transition. Same pale natural aspen as the cladding, so it blends rather than competes. The detail that separates a lined room from a finished room is usually this piece, or its absence. Sold by the linear foot in 1 and 10 ft lengths at $3.60/lf, milled in Estonia.

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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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    PROSAUNAS Alder 2X2 S4SEE SHP Moulding & Trim – Sauna Wood

    Price range: $3.48 through $34.73

    The trim piece that pulls a room together. This is the alder 2×2 S4SEE moulding: 1.1" square (28mm x 28mm), surfaced four sides with eased edges, milled in Estonia from natural alder. Use it to cap bench edges, frame out a heater enclosure, or add a furniture-quality line wherever you need one. Warm reddish-brown tone matches the alder bench and cladding family exactly. At $3.48 per linear foot it’s the least glamorous piece in the room, but the room looks noticeably better with it. Sold by the linear foot in 1, 8, 9, and 10 ft lengths.

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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-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.

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    Thermory Thermo-Aspen 2×2 VA

    Price range: $3.15 through $31.50
    Thermo-Aspen, Sauna Wood, 1″x2″ SI Curved Angle Molding
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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 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 Aspen 2X2 VA Outside Corner Trim – Sauna Wood

    Price range: $3.07 through $24.57

    Outside corners on a sauna wall are a small detail with a noticeable finish impact. The aspen 2×2 VA outside corner trim wraps the convex corner where two clad surfaces meet on the exterior angle: 28mm on both faces, in pale natural aspen that matches the wall boards. It gives the corner a finished look and protects the raw edge of the cladding at the same time. Sold by the linear foot in 1 and 10 ft lengths at $3.07/lf, milled in Estonia.

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    PROSAUNAS Aspen 1X2 UK Door Trim – Sauna Wood

    Price range: $3.07 through $24.57

    Every clad sauna room has a door, and the door surround is where the cladding either reads finished or reads unfinished. This is the ProSaunas aspen 1×2 UK door trim: 12mm thick, 42mm wide, in natural aspen that matches the wall boards. It wraps the door opening cleanly and covers the raw edge of the cladding at the reveal. Aspen stays cool, has no resin, and takes paint or a clear finish equally well. Sold by the linear foot in 1 and 10 ft lengths at $3.07/lf, milled in Estonia.

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    PROSAUNAS Alder 2X2 VA Outside Corner Trim – Sauna Wood

    Price range: $3.07 through $24.57

    Outside corners are the exposed edges, which means they’re what people see and touch first. This is the alder VA outside corner trim: 1.1" square (28mm x 28mm), angle-moulded to wrap outside corners cleanly in natural alder. Same warm reddish-brown tone as the rest of the ProSaunas alder family, milled in Estonia, E1 certified. Beefier than the inside corner piece at the same 1.1" section, which makes sense: outside corners take contact. At $3.07 per linear foot it finishes the room where the finish matters most. Sold by the linear foot in 1 and 8 ft lengths.

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    PROSAUNAS Alder 1X2 UK Door Trim – Sauna Wood

    Price range: $3.07 through $24.57

    Every sauna door looks better with this on it. The alder 1×2 UK door trim, 0.47" thick by 1.65" wide (12mm x 42mm), milled in Estonia from natural alder for clean, finished doorway edges. This is the piece that makes the transition from framing to cladding look intentional. Warm reddish-brown alder tone, fine grain, E1 certified. Water-repellent and cool to the touch. It’s a finishing detail, not a structural piece, but a sauna doorway without it reads unfinished. Sold by the linear foot in 1 and 8 ft lengths.

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    PROSAUNAS Western Red Cedar 1X4 STK T&G V2E Wall Cladding – Sauna Wood

    Price range: $2.64 through $21.16

    The 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 cabin-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.

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    PROSAUNAS Aspen 1X2 T-Moulding Moulding & Trim – Sauna Wood

    Price range: $2.54 through $20.31

    The T-moulding is the piece most people forget to order until the bench is built and there’s an exposed edge staring back at them. This is the ProSaunas aspen 1×2 T-moulding: 17mm thick, 32mm wide, in pale natural aspen that matches our cladding and bench boards. It covers raw edges cleanly, sits flush where two surfaces meet at a seam, and disappears into the room the way good trim should. Sold by the linear foot in 1 and 10 ft lengths at $2.54/lf, milled in Estonia.

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

    Price range: $1.33 through $18.68

    The 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.

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    PROSAUNAS Aspen 1X1 S4SEE SHP Moulding & Trim – Sauna Wood

    Price range: $2.13 through $17.09

    Small piece, big finish difference. The aspen 1×1 S4SEE is a 21mm square moulding, surfaced smooth on all four sides with eased edges, and it’s what turns a clad sauna wall from a room with boards on it into a room that looks finished. Cap a horizontal run, cover a ceiling-to-wall seam, hide a gap where wall meets bench frame: this is the piece. Pale aspen, resin-free, cool to the touch. Sold by the linear foot in 1 and 10 ft lengths at $2.13/lf, milled in Estonia.

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