Sauna Wood

Sauna wood at Topture is ProSaunas lumber for building a sauna room: tongue-and-groove paneling for walls and ceilings, smooth bench wood, and trim, sold by the board in lengths from 1 ft, most up to 10 ft. Choose the species first: Aspen, Thermo-Aspen, Alder and Thermo-Radiata Pine come as paneling, bench wood and trim, so one wood can run through the whole room.

Also available: Western Red Cedar, Hemlock and Spruce, in the product list below.

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Which wood to use for a sauna

The species sets the room's color and grain and whether the walls, benches and trim can match. The table lists what each wood is sold as here and how ProSaunas describes it.

Sauna wood species: what each comes as and how it looks
Species	Sold here as	Look (ProSaunas)
Western Red Cedar	Paneling, bench wood	Light reddish-brown, straight grain
Aspen	Paneling, bench wood, trim	Light, creamy color, straight grain; also black-finished boards
Hemlock	Paneling, bench wood	Light straw color, straight grain
Alder	Paneling, bench wood, trim	Light color, subtle grain
Thermo-Aspen	Paneling, bench wood, trim	Golden brown, straight grain
Thermo-Spruce	Paneling, bench wood	Rich amber color, figured and knotty
Thermo-Radiata Pine	Paneling, bench wood, trim	Rich color, pronounced knotty grain
Spruce	Paneling	Light color, knotty, rustic

Choosing sauna wood by look and use

For a light, bright room, aspen, alder, hemlock and spruce keep the walls pale. Thermo-Aspen, Thermo-Spruce and Thermo-Radiata Pine give a darker, warmer room, and Western Red Cedar sits between them in light reddish-brown. Knots are a matter of look: clear boards have none, while select tight knot cedar, spruce, Thermo-Spruce and Thermo-Radiata Pine show them.

A few points from ProSaunas help narrow the choice. It describes aspen and alder as having low heat conductivity, so they stay comfortable to the touch in a hot sauna, and aspen as not secreting resin. It calls Western Red Cedar the traditional North American sauna wood and says it naturally resists decay, rot and insects, and it calls hemlock a good choice for indoor saunas.

Thermally modified sauna wood

Thermo-Aspen, Thermo-Radiata Pine and Thermo-Spruce are thermally modified: ProSaunas treats the wood with heat, steam and pressure and no chemicals, which gives it its darker color. Apart from that treatment the boards are unfinished. The natural species are sold unoiled, and the Aspen Midnight Black boards carry a black finish.

Sauna paneling, bench wood and trim

Sauna paneling: tongue-and-groove boards for walls and ceilings, in four profiles from the narrow nickel gap to the broad Grace large gap.
Sauna bench wood: boards smooth on four sides with eased edges, which ProSaunas recommends, depending on the board, for benches, backrests, skirts and floors; the 4x4 cedar is for bench legs, supports or a support beam.
Sauna trim: inside and outside corners, door trim, T-molding, and 1x1 and 2x2 trim.

A board's name, such as 1x4, is its nominal size. Each product page lists the actual thickness and width, and paneling pages add the face width each board covers once installed: an Aspen 1x4 nickel-gap board measures 0.59″ × 3.54″ and covers 3.15″.

Sauna wood shipping

Sauna wood ships to the contiguous US at one flat freight rate per order, set by the number of boards in the order and the length of the longest board, so a full room of boards costs one freight charge. The rate table is in the Shipping tab on every sauna wood page; boards over 10 ft and orders of 1,000 boards or more are quoted after the order.

Sauna wood next steps

Species chosen: open its page, such as Western Red Cedar or aspen sauna wood, to see every board in that wood.
Planning the whole room: doors, windows and lighting are in sauna building materials, and the heater in sauna heaters.
Not sure how much to order: send your room size to Topture's Lifetime Expert Support.

Reviewed October 2026

Frequently Asked Questions

What wood is used for a sauna?

Sauna rooms are usually lined with a light, low-resin softwood or with cedar. Topture's sauna wood comes in aspen, alder, Thermo-Aspen, Thermo-Radiata Pine, Thermo-Spruce, Western Red Cedar, hemlock and spruce. Aspen, Thermo-Aspen, Alder and Thermo-Radiata Pine are each sold as paneling, bench wood and trim, so one wood can be used throughout the room.

What is thermally modified sauna wood?

It is wood treated with heat, steam and pressure and no chemicals, which darkens its color. Topture sells thermally modified aspen (Thermo-Aspen), radiata pine and spruce from ProSaunas; apart from the treatment the boards are unfinished.

How is sauna wood sold?

By the board. Each product page offers the board in lengths, and you set the number of boards with the quantity selector. The name of a board, such as 1x4, is its nominal size; the page lists its actual thickness and width in inches.

How is sauna wood shipped?

Sauna wood ships to the contiguous US at one flat freight rate per order, set by the number of boards across all the sauna wood in the cart and the length of the longest board. The rate table is in the Shipping tab on every sauna wood page. Boards over 10 ft and orders of 1,000 boards or more are quoted after you order.