SAUNA WOOD

Sauna Wood for Sale: Thermowood, Abachi and Larch

From the bench you sit on to the terrace outside. Explore the character, practical uses and care of our five material options.

Explore our real Abachi and Thermo Spruce samples and Thermo Larch terrace photos alongside selected material references. Final colours, profiles and availability are confirmed with your quotation.

ecosh Abachi wood sample showing its grain and hand-applied clear wax finish
ecosh Abachi sample, finished by hand with clear wax.

01 / Sauna benches & backrests

Abachi Wood for Sauna Interiors & Decorative Panels

Natural grain. Finished by hand.

Abachi, also known as ayous or obeche, is a lightweight African hardwood. Its fine texture and low thermal conductivity make it a familiar choice for sauna seating and backrests. Natural abachi is pale cream to light yellow; thermally modified abachi is darker.

Why choose it
A gentle grain and relatively uniform appearance suit broad, simple bench designs.
Specify it carefully
Choose smooth bench boards with rounded edges. Confirm natural or thermo-treated material when requesting a sample: their colours differ considerably.
Care
Use a seat towel, wipe the surface after use and allow the sauna to dry. Use only treatments intended for sauna wood.

Board sizes for your project

Board lengths: approximately 9.84–14.76 ft (3–4.5 m).

Available Abachi profiles — approximate inches
ThicknessOverall widthCoverage width
0.59 in3.54 in3.15 in
0.79 in5.51 in5.12 in
1.10 in7.48 in7.28 in

Converted from 15 × 90 mm (80 mm coverage), 20 × 140 mm (130 mm coverage), and 28 × 190 mm (185 mm coverage). Coverage is the visible width after the boards are joined. Use coverage width when calculating the number of boards; final dimensions and availability are confirmed in your quote.

Choosing a profile: Tell us whether you need seating, backrests, wall cladding or decorative panels. The dimensions above do not establish suitability for every application; we will confirm the profile, edge finish and intended use in your quotation.

Finished by hand, board by board

The samples shown are finished with clear wax. An oil finish is also available and can deepen the tone for a darker Abachi look. We apply both wax and oil by hand, working with the grain and checking every board for an even finish.

For a coordinated sauna interior, our preferred combination is waxed walls and oiled benches, using finishes approved for each surface and the intended sauna conditions. Each board is individually finished for your project. Review a physical sample to choose the tone.

CNC-patterned Abachi panels

Abachi can also be made into panels approximately 78.74 × 47.24 in — about 6.56 × 3.94 ft (2000 × 1200 mm). CNC machining creates the flowing or fluted relief, followed by hand-applied wax or oil. The photographs show small pattern samples, not full-size panels. Discuss the pattern, panel construction and intended installation with us.

Request Abachi Pricing & Availability

Read our Abachi sauna bench guide →

ecosh Thermo Spruce board sample with a dark finish and natural knots
Our Thermo Spruce sample in a dark finish.
Close-up of the dark Thermo Spruce sample showing grain and knots
A closer look at the grain and surface texture.

02 / Exterior cladding

Thermo Spruce

Nordic grain with natural knots.

Our Thermo Spruce sample shows a dark finish with visible grain and natural knots. Thermally modified spruce has a warmer brown tone before finishing; the final appearance depends on the selected finish. Heat treatment reduces moisture uptake and moisture-related movement, making it a practical material to consider for exterior cladding.

Character
Expect visible knots and variation between boards. A brushed surface brings out the grain; a smooth finish gives a quieter appearance.
Installation
Specify a façade profile and a ventilated cladding assembly. Board orientation, fixings and clearances must follow the selected product’s installation guide.
Colour outdoors
Sunlight gradually turns untreated surfaces silver-grey. To retain the brown tone, use the manufacturer’s recommended UV-protective finish and maintenance schedule.
Discuss Thermo Spruce for your project →

Material reference: Thermory · Thermo-spruce cladding

Glulam sauna interior with warm wood wall panels, benches and soft lighting
Glulam sauna interior — selected material reference.

03 / Sauna interior

Glulam

Warm wood. A continuous interior.

Glulam, or glued laminated timber, is the material selected for this sauna interior. The reference photo shows broad horizontal wall panels, warm brown tones and soft lighting that bring the room together.

Character
The wide panels create a calm backdrop for the benches and heater. Natural grain gives each surface its own character.
For your sauna
Glulam describes a bonded timber construction. We confirm the wood species, panel dimensions, adhesive and finish for the sauna application with your quotation.
Complete the look
Review the wall panels alongside your chosen bench material and lighting. Ask for available profiles and a sample to confirm the final colour and surface.
Discuss Glulam for your project →
Illustrative terrace with brown thermo-ash-style decking and a light lounge chair
AI-generated illustration of a thermo-ash terrace. Confirm actual colour and profile with a physical sample.

04 / Sauna accents & changing room

Thermo Ash

Deep brown. Expressive grain.

Thermal modification gives ash a rich brown colour while preserving its distinctive grain. Selected thermo-ash cladding is available with a knot-free appearance and improved dimensional stability. It creates a strong visual connection between the sauna interior and changing room.

Where to use it
Consider it for wall finishes and architectural accents. For use inside the hot room, confirm a sauna-approved profile and finish; general interior approval alone is not enough.
Visual effect
Its pronounced grain and deeper shade work well with soft lighting. Review a sample alongside the bench wood before choosing the full interior.
Ordering
Confirm the intended surface, treatment, profile and fixing system. The performance of a named manufacturer’s product does not apply automatically to every thermo-ash board.
Discuss Thermo Ash for your project →
Real thermo-larch terrace with patterned decking overlooking fields
Thermo Larch in a real terrace project.
Real thermo-larch terrace showing board grain and the change in laying direction
A closer look at the grain and decking pattern.
Dark thermo-larch terrace board with pronounced grain
Thermo-larch board — selected material reference.

05 / Terrace & decking projects

Thermo Larch

Continue the wood beyond the sauna.

Thermo larch is heat-treated larch, distinct from ordinary kiln-dried larch. Manufacturers use thermal treatment to improve stability and weather resistance. Its warm colour and visible grain make it a material to explore for the outdoor area around the sauna.

Decking specification
The project photos show thermo-larch installed as outdoor decking; the board image shows the selected material reference. Confirm available dimensions, support spacing and fixings with your quotation.
Plan for water
The deck design must allow drainage and ventilation. Discuss wet barefoot use, surface texture and maintenance when selecting the final product.
Appearance & care
Exterior timber changes colour with exposure. Follow the selected supplier’s cleaning and finishing instructions; thermal treatment does not make timber maintenance-free.
Discuss Thermo Larch for your project →

Material reference: Sivalbp · Thermo-larch material guide

Made clearer,
before you order.

Share the material, intended use, approximate area or board length, delivery ZIP code and project timing. We will confirm available profiles, dimensions, treatment, quantities and pricing for your project.

Plan your wood selection →
Which Abachi profiles are suitable for sauna benches?

Seating needs a profile selected for its span, support and smooth, rounded contact edges. Tell us your bench layout so we can confirm the appropriate board; do not choose a seating board from thickness alone. Wall cladding and decorative panels have different requirements.

Can I order unfinished, waxed or oiled Abachi?

Our samples show clear wax, and an oil finish is also available. Ask about unfinished supply when requesting your quote. Confirm the finish for the intended surface: a wall finish is not automatically suitable for a bench.

What sizes are available for decorative panels?

Our CNC-patterned Abachi panels are approximately 78.74 × 47.24 in (2000 × 1200 mm). The photographs show small pattern samples. Confirm the pattern, construction, final dimensions and installation requirements with us.

What information do you need for an Abachi quote?

Send your intended use, preferred profile or panel size, quantity or area, finish, delivery ZIP code and project timing. Ask us to confirm availability, any minimum order quantity, lead time and delivery charges for your California project before ordering.

What does “thermo” mean?

The wood has been modified using heat. The process changes colour and moisture behaviour; it is different from simply staining a board brown. Properties depend on the species and treatment.

Will my boards match the photos exactly?

Wood varies in grain and colour. Lighting, oil and brushing also affect its appearance. The photos show selected material references. Confirm your final selection with a physical sample.

How do I care for sauna wood?

Use a seat towel, wipe benches with a clean damp cloth and avoid leaving pooled water. Let wood dry with adequate ventilation. Use sauna-compatible cleaners and finishes as directed by the manufacturer.

Thermory sauna care guide
Can all these materials be used in the hot room?

No. Bench wood, interior panels, façade boards and decking have different requirements. Confirm the exact product and its approved application, including any adhesive and finish, before installation.

Choose wood by where it works best.

Ask about profiles, dimensions, quantities, availability and California delivery for your project.

Before you choose.

Abachi vs Aspen vs Alder: Which Wood Should You Choose for Sauna Benches?