Sauna lumber is specially selected wood designed for the unique heat, moisture, and airflow conditions inside a sauna. Unlike standard construction lumber, sauna-grade wood is chosen for its stability, low resin content, and ability to perform in high-temperature environments.

Cedar Sense offers premium sauna lumber options for lining the interior walls and ceilings of saunas, including cedar, aspen, alder, thermally modified wood, and other specialty species. These woods are commonly used in traditional Finnish saunas, custom indoor saunas, and DIY builds.

Showing 1–12 of 15 results

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1″ x 4″ Cedar Tongue and Groove | Western Red Cedar Planks

Original price was: $48.00.Current price is: $36.00.
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Premium cedar tongue and groove boards in 8' lengths—ideal for sauna
walls, ceilings, and high-end interior finishes.

1x4 cedar tongue and groove sauna lumber board dimensions
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1″ x 4″ x 8′ Cedar Tongue & Groove Sauna Lumber | Sauna Wood | Select Tight Knot | V-Joint on 2 Edges of the Smooth Face | Wall Material

Original price was: $36.00.Current price is: $28.00.
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Sauna Lumber • Cedar Tongue & Groove 1″ x 4″ x 8′ Cedar Tongue & Groove Sauna-grade knotty cedar paneling

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Alder 1×4 T&G STS4 | Sauna Wood | Tongue & Groove | STS4 Profile | Nickel-Gap | Wall Material

Price range: $21.00 through $35.00
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Select options This product has multiple variants. The options may be chosen on the product page
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Aspen 1×4 T&G STS4 | Sauna Wood | Tongue & Groove | STS4 Profile | Nickel-Gap | Wall Material

Price range: $24.00 through $40.00
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Select options This product has multiple variants. The options may be chosen on the product page
Cedar wood boards with tongue and groove design for sauna rooms
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Vertical grain cedar tongue and groove lumber for sauna interior

Cedar 1″ x 4″ T&G V2E | Sauna Wood | Vertical Grain | Clear Grade A+ | Tongue & Groove | V-Joint on 2 Edges of the Smooth Face | Wall Material

Price range: $69.00 through $114.00
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Select options This product has multiple variants. The options may be chosen on the product page
Cedar wood for sauna 1x4 VG S4SEE vertical grain board
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Natural cedar wood boards stacked for sauna build

Cedar 1″ x 4″ VG S4SEE | Sauna Cedar Wood for Sale | Vertical Grain | Clear Cedar Grade A+ | Smooth 4 Sides Eased Edges | Bench Material

Price range: $72.30 through $120.50
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Select options This product has multiple variants. The options may be chosen on the product page
Cedar for sauna interior paneling showing tongue and groove profile
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Cedar sauna lumber with interlocking tongue and groove joints

Cedar 1″ x 6″ T&G V2E | Sauna Wood | Vertical Grain | Clear Grade A+ | Tongue & Groove | V-Joint on 2 Edges of the Smooth Face | Wall Material

Price range: $105.60 through $176.00
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Select options This product has multiple variants. The options may be chosen on the product page
Close-up of cedar lumber for sauna benches and floors
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Premium cedar for sauna benches and wood interior surfaces

Cedar 1″ x 6″ VG S4SEE | Cedar for Sauna | Vertical Grain | Clear Cedar Grade A+ | Smooth 4 Sides Eased Edges | Bench Material

Price range: $109.50 through $182.50
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Select options This product has multiple variants. The options may be chosen on the product page
Clear cedar 2x4 vertical grain sauna bench lumber with smooth eased edges
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High-quality clear cedar 2x4 used for sauna flooring and bench frames

Cedar 2″ x 4″ VG S4SEE | Sauna Wood | Vertical Grain | Clear Cedar Grade A+ | Smooth 4 Sides Eased Edges | Bench Material

Price range: $138.00 through $228.00
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Select options This product has multiple variants. The options may be chosen on the product page
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Thermo-Aspen Graceâ„¢ Tongue & Groove Sauna Wood | 2×3 Large-Gap | 8′ Wall Material

Original price was: $58.00.Current price is: $43.28.
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Thermo-Aspen Sauna Wood Thermo-Aspen Grace™ Tongue & Groove – 2×3 Large-Gap Make a bold architectural statement inside your sauna. The

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Thermo-Aspen Sauna Bench Wood | 2″×4″ S4SEE | 8′ Bench Material

Original price was: $76.00.Current price is: $57.84.
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Thermo-Aspen Sauna Wood Thermo-Aspen Sauna Bench Material – 2×4 S4SEE Premium, thermally modified Aspen built for high-heat comfort—smooth on all

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Thermo-Aspen Sauna Door Trim | 1″×2″ | 8′ Door Trim

Original price was: $40.00.Current price is: $29.68.
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Thermo-Aspen Sauna Wood Thermo-Aspen Sauna Door Trim – 1×2 (UK Profile) Finish your sauna with clean, refined detail. Thermo-Aspen door

Premium wood for lining sauna interiors, available in cedar, aspen, alder, thermo wood, and more.