Thermo Abachi represents the global standard for premium African sauna timber, combining the naturally exceptional thermal properties of Abachi with the long-term durability conferred by professional heat treatment. Abachi’s remarkably low density gives it the lowest surface temperature of any sauna wood — even lower than Aspen — making it the ultimate choice for benches and backrests in environments where skin-contact comfort is the primary concern. After thermal modification, its resistance to moisture, warping, and biological degradation is dramatically enhanced.

Its fine, consistent grain and neutral creamy tone give Thermo Abachi a refined, almost architectural quality that suits the most demanding luxury spa and wellness installations. Lightweight yet structurally stable, it is easy to handle and machine to precise tolerances, making it a favorite among master sauna builders who refuse to compromise on either comfort or craftsmanship. Where the very best is the only acceptable standard, Thermo Abachi delivers.

Species Overview

Janka Hardness: 270 lbf | Grain: Straight, Very Fine
Avg Dried Weight: 24 lbs/ft³ | Odor: Virtually None
Color: Light to Medium Brown | Resin Content: Non-Resinous

Abachi — known botanically as Triplochiton scleroxylon and harvested from the managed forests of West and Central Africa — possesses a natural cellular structure unlike any other sauna timber. Its extraordinarily low density and remarkably open grain produce surface temperatures lower than any other commonly used sauna wood, including White Aspen. For bench and backrest applications in high-heat environments, nothing else compares.

Thermal modification takes these already exceptional properties and fortifies them for the long term. The treatment process increases the wood’s resistance to moisture absorption and biological degradation, dramatically extending its service life in the demanding wet-dry cycles of daily sauna use. The result is a timber that is simultaneously the most comfortable and one of the most durable in our entire collection.

Thermo Abachi’s fine, consistent grain and neutral creamy-brown tone give it a refined, almost minimalist aesthetic well suited to the clean lines of contemporary wellness architecture. Lightweight and easy to machine to exacting tolerances, it is the preferred choice of master sauna builders for whom the client experience — from first touch to last breath of clean air — is the ultimate measure of quality.

Available Materials

STS A – 1X4 | T&G Nickel Gap – Wall Profile
Thermo Abachi’s fine, even grain and neutral creamy-brown tone give the 1×4 nickel gap panel a quiet, refined character perfectly suited to contemporary wellness architecture. The shadow-line reveal adds subtle dimension without competing with the wood’s understated natural beauty.

• Nominal size: 1×4 | Actual size: 0.59″ x 3.54″ x 94.49″
• Face width: 3½» with ½» gap reveal | Profile: T&G / nickel gap
• Typical use: Walls and ceilings | Installation: Blind nail or clip

STS A – 1X4 DUAL | T&G Nickel Gap – Wall Profile
The dual-face Thermo Abachi panel extends the species’ refined, consistent surface to both sides of the installation. Its neutral tone and minimal grain variation make it one of the most architecturally versatile options in our thermowood range — equally at home in glass-backed feature walls and full-room paneling systems.

• Nominal size: 1×4 | Actual size: 0.59″ x 3.54″ x 94.49″
• Face width: 3½» with ½» gap reveal | Profile: T&G / nickel gap
• Typical use: Walls, ceilings, partition walls | Installation: Blind nail or clip

S4S A – 2X4 (*) | Bench Profile
Thermo Abachi produces the coolest bench surface of any species in our collection. Its extraordinarily low density and open cellular structure keep surface temperatures lower than any other sauna timber — including White Aspen — making the 2×4 S4S bench board the ultimate specification for client comfort in high-heat environments.

• Nominal size: 2×4 | Actual size: 1.10″ x 3.54″ x 94.49″
• Profile: S4S / smooth four sides
• Typical use: Benches and platforms | Installation: Face nail or screw

S4S A – 2X6 (*) | Bench Profile
The 2×6 Thermo Abachi bench board is the finest seating surface we offer. Wide, continuous boards with the lowest thermal surface temperature of any available sauna timber create a bench experience that is genuinely unmatched. For clients and builders for whom the ultimate measure of quality is how the sauna feels — this is the answer.

• Nominal size: 2×6 | Actual size: 1.10″ x 4.72″ x 94.49″
• Profile: S4S / smooth four sides
• Typical use: Benches and platforms | Installation: Face nail or screw