Thermo-Aspen 1x1 Trim

Name: Thermo-Aspen 1x1 Trim
Brand: Prosaunas
SKU: WOOD684-1
Price: 2.51 USD
Availability: InStock

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Furniture-Quality Finish, Built for the Sauna

This Thermo-Aspen 1x1 trim piece from Prosaunas delivers clean, defined lines wherever your sauna needs a polished edge. Smooth on all four sides with eased edges, it brings a refined, furniture-quality look to interior trim details — all in a compact 21 × 21 mm profile cut to 292 mm in length.

Why Thermo-Aspen Belongs in Your Sauna

Thermo-Aspen is prized as a sauna material because it does not secrete resin, splinter, or overheat. The thermal modification process — a completely organic treatment using heat, steam, and pressure — makes the wood more dimensionally stable, more water-resistant, and far superior to untreated wood for resisting decay, pests, and harmful fungi. The result is a warm, golden-brown tone that looks as good as it performs.

Sourced and Crafted to Prosaunas' Standards

Prosaunas selects only the finest wood from Northern Europe and Canada, backed by more than 55 years of experience crafting premium sauna rooms across North America. Every piece meets their stringent quality and consistency standards, so your trim arrives exactly as expected — ready to complete your build with confidence.

PRODUCT SHEET

PROSAUNAS Thermo-Aspen Sauna Wood Interior

Thermo-Aspen 1x1 Trim

Length Per Piece: 1' 1' 7' 8'

Product variants

$2.51 USD

Freight added at checkout

Installation Required

Trim pieces are cut to length and fastened in place as part of your sauna's finish work. Standard woodworking tools and fasteners appropriate for thermally modified aspen are needed on site.

Description

Features

What's Included?

Size & Weight

Electrical Specs

Shipping & Delivery

Warranty

Documents

Description

Thermo-Aspen 1x1 trim is milled smooth on all four sides with eased edges, giving you a clean, finished transition wherever two surfaces meet inside your sauna — around venting, door frames, bench supports, or wall junctions.

Thermally modified aspen responds well to the heat and humidity cycles of a sauna environment. The modification process reduces the wood's moisture content and increases its dimensional stability, meaning this trim is less prone to the warping and checking that can affect untreated lumber over time.

Available in 1-foot, 7-foot, and 8-foot lengths, these pieces let you work with what your layout actually requires rather than cutting down longer stock and wasting material.

Key Features

Thermally modified aspen — the modification process improves dimensional stability, so the trim holds its shape through repeated heat and humidity cycles rather than cupping or splitting.
21mm × 21mm (1x1) profile milled smooth on all four sides with eased edges, producing a finished appearance without additional sanding or profiling on site.
Eased edges soften the corners slightly, reducing the chance of splinters on a surface that hands and feet may brush against regularly.
S4SEE (smooth four sides, eased edges) designation confirms consistent milling across every piece, so joints and transitions align cleanly.

1'

292mm length — useful for short fill pieces, inside corners, and tight accent runs where a longer board would require significant waste.

7'

7-foot length suits most standard sauna wall heights, minimizing seams on vertical trim runs.

8'

8-foot length provides the longest continuous run of the three options, ideal for horizontal trim lines or rooms with taller ceiling heights.

Size & Weight

Dimensions

21 × 21 mm

Product Width

0.83" (21mm)

Shipping Length

Up to 8'

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.

Description

Available in 1-foot, 7-foot, and 8-foot lengths, these pieces let you work with what your layout actually requires rather than cutting down longer stock and wasting material.

Features

Key Features

Thermally modified aspen — the modification process improves dimensional stability, so the trim holds its shape through repeated heat and humidity cycles rather than cupping or splitting.
21mm × 21mm (1x1) profile milled smooth on all four sides with eased edges, producing a finished appearance without additional sanding or profiling on site.
Eased edges soften the corners slightly, reducing the chance of splinters on a surface that hands and feet may brush against regularly.
S4SEE (smooth four sides, eased edges) designation confirms consistent milling across every piece, so joints and transitions align cleanly.

1'

292mm length — useful for short fill pieces, inside corners, and tight accent runs where a longer board would require significant waste.

7'

7-foot length suits most standard sauna wall heights, minimizing seams on vertical trim runs.

8'

8-foot length provides the longest continuous run of the three options, ideal for horizontal trim lines or rooms with taller ceiling heights.

What's Included?

Size & Weight

Dimensions

21 × 21 mm

Product Width

0.83" (21mm)

Shipping Length

Up to 8'

Electrical Specs

Shipping & Delivery

SHIPPING & DELIVERY

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.

Warranty

Documents

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Design

DIMENSIONS

Model: Thermo-Aspen 1x1 Trim
Nominal size: 1x1 (21mm x 21mm)
Length per piece: 1', 7', 8'
Weight: 1–8 lb (0.45–3.63 kg)

MATERIALS

Species: Aspen
Finish: Thermally Modified
Profile: S4SEE (surfaced four sides, eased edges)
Thickness: 0.83" (21mm)

Brand Spotlight

Prosaunas

Built by Sauna Artisans

From Western Red Cedar to Himalayan salt, every material is chosen by our team of sauna artisans — because "Perfection in Sauna" is the standard we build to, not just a tagline.

Prosaunas

Everything Your Sauna Needs, One Source

Wood, doors, windows, lighting, salt, care products — Prosaunas outfits every detail of your build, backed by a nationwide dealer network.

Prosaunas

Real Experts, Real Answers

Questions about materials or installation? Our Wheeling, Illinois-based team is here Monday–Friday, and every build is backed by our workmanship warranty.

DELIVERY & INSTALL

Delivery

Assembly

Install

Delivery

Assembly

Install

Let customers speak for us

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DETOXIFICATION

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Extensive research has shown that exposure to cold and heat can effectively reduce inflammation, accelerating the recovery process and providing relief from pain.

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MENTAL HEALTH

Through breathing techniques you can learn to calm your nervous system in intense heat and cold. Breathing is the key to a racing heart and a racing mind.

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IMPROVED SLEEP

Whoop™ posted a study that showed a 2.5x increase in sleep consistency on days when people practice cold exposure. Learn how heat & cold to create better habits and deeper sleep.

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HEART HEALTH