Description

Thermo-Spruce is spruce that has been heat-treated — a kiln process that drives out moisture and resins, making the wood dimensionally stable and far less likely to warp, check, or bleed sap when exposed to the sustained heat of a sauna environment. The result is a bench board that holds its shape and stays clean underfoot or under hand over years of regular use.

Each board is milled to a true 2x4 profile (26mm × 90mm), smooth on all four sides with eased edges — meaning the long corners are gently relieved so they don't bite into skin during a session. We offer these boards in ten lengths from 1 foot through 10 feet, letting you cut to fit your bench framing with minimal waste regardless of your sauna's interior dimensions.

Key Features

• Heat-treated Thermo-Spruce construction — the thermal modification process removes moisture and resins so the wood resists warping, cracking, and sap bleed in high-heat sauna conditions.
• True 26mm × 90mm (2x4) cross-section — a consistent, structural profile suitable for bench seats, bench frames, and backrest slats.
• Smooth 4 Sides Eased Edges (S4SEE) finish — all four faces are planed smooth and the long edges are lightly rounded, preventing sharp corners from pressing into skin during use.
• Available in ten lengths from 1 ft to 10 ft — choose the length closest to your finished dimension to reduce on-site cutting and off-cut waste.

1'

• 292 mm finished length — suited for short infill sections, end caps, or custom accent cuts.

2'

• Approximately 610 mm — useful for compact benches or filler boards where a full-length board would require significant trimming.

3'

• Approximately 914 mm — a common width for single-tier bench seats in smaller sauna cabins.

4'

• Approximately 1219 mm — covers standard bench depths and shorter wall-to-wall spans without a seam.

5'

• Approximately 1524 mm — spans mid-size bench runs and works well as a continuous seat board for one person.

6'

• Approximately 1829 mm — one of the most versatile lengths for full bench seats and backrest planks in typical sauna builds.

7'

• Approximately 2134 mm — suited to longer bench runs or layouts where a 6 ft board falls just short.

8'

• Approximately 2438 mm — covers an 8-foot wall span in a single unjointed board, minimizing visible seams on wide benches.

9'

• Approximately 2743 mm — reduces the need for butt joints on longer custom bench configurations.

10'

• Approximately 3048 mm — the longest available option, ideal for large custom saunas where continuous board runs are preferred for aesthetics and structural simplicity.

SHIPPING & DELIVERY

Sauna wood is not free shipping. Length, piece count, profile, and weight set the rate. These are the Bathing Brands contiguous-US flat rates. Canada is the same table plus $100. Alaska, Hawaii, and remote addresses are quoted.

Checkout charges the 8' piece-count table (contiguous US). Canada is the same table plus $100. Boards over 8' use that same checkout rate; dock or liftgate extras are a follow-up. Alaska, Hawaii, and remote addresses are quoted.

BOARDS UP TO 8'

Under 40 pieces generally ships FedEx Ground in cardboard. Over 40 pieces generally ships LTL with a liftgate on a wood pallet. The longest board in the order sets the rate tier.

• Under 19 boards — $195
• 20–39 boards — $395
• 40–99 boards — $495
• 100–299 boards — $695
• 300–499 boards — $895
• 500–799 boards — $995
• 800–999 boards — $1,295

BOARDS OVER 8' UP TO 10'

These lengths ship LTL on a wood pallet. They do not qualify for a liftgate — you need a dock, machinery, or hand offload on site. Carriers allow about one hour to unload before extra fees.

• Under 19 boards — $295
• 20–39 boards — $495
• 40–99 boards — $595
• 100–299 boards — $795
• 300–499 boards — $995
• 500–799 boards — $1,095
• 800–999 boards — $1,395

HOW THIS SHIPS

• We pack for a safe arrival at the lowest rate that fits the order.
• Boards over 8' carry a surcharge because long crates cost more to move than a standard skid.
• Heaters, doors, or accessories on the same order can offset some of that freight.