Thermo-treated oak slat 2,6 x 9,5 cm S4S natural
8,98 € HT10,78 € TTC
Seats and backrests
A sauna bench is in direct contact with the skin at 80-100 °C: the timber must be resin-free, dimensionally stable and pleasant to the touch. Our selection in alder, thermally modified pine, thermally modified oak and thermo abachi meets every one of these requirements.
22
products
Smooth Scandinavian spruce floorboard AB 2.8 x 19.6 cm
5,43 € HT6,52 € TTC
Thermo-treated pine square timber 4,2 × 4,2 cm, natural grade
4,87 € HT5,84 € TTC
Planed spruce board 2,8 × 7 cm, class AB
2,20 € HT2,64 € TTC
Thermo-treated Scandinavian pine cladding 4,2 x 9,2 cm class NATUREL
7,61 € HT9,13 € TTC
Scandinavian spruce strip 18×45 class AB
1,04 € HT1,25 € TTC
of which 0,01 € eco-contribution excl. VAT (0,01 € incl. VAT)
28×145 Smooth Scandinavian Spruce class AB
4,05 € HT4,86 € TTC
of which 0,03 € eco-contribution excl. VAT (0,04 € incl. VAT)
Thermo Pine Square 42×68, NATUR class
5,73 € HT6,88 € TTC
of which 0,02 € eco-contribution excl. VAT (0,02 € incl. VAT)
Board 15×42 Alder planed S4S class A
3,90 € HT4,68 € TTC
Planed board Thermo Sosna 26×92 S4S class AB
4,83 € HT5,80 € TTC
of which 0,02 € eco-contribution excl. VAT (0,02 € incl. VAT)
Scandinavian spruce planed board 28×170 S4S class AB
4,75 € HT5,70 € TTC
of which 0,04 € eco-contribution excl. VAT (0,05 € incl. VAT)
Alder planed board 15×68 S4S class A
4,14 € HT4,97 € TTC
of which 0,01 € eco-contribution excl. VAT (0,01 € incl. VAT)
Thermo Pine Square 42×140, NATUR class
10,89 € HT13,07 € TTC
of which 0,04 € eco-contribution excl. VAT (0,05 € incl. VAT)
Thermo Sosna 42×140 decking board, NATUR class
77,82 € HT93,38 € TTC
of which 0,31 € eco-contribution excl. VAT (0,37 € incl. VAT)
Alder planed board 28×90 S4S class A
9,73 € HT11,67 € TTC
of which 0,02 € eco-contribution excl. VAT (0,02 € incl. VAT)
Scandinavian spruce strip 28×45 class AB
1,46 € HT1,75 € TTC
of which 0,01 € eco-contribution excl. VAT (0,01 € incl. VAT)
Planed board Thermo Sosna 42×117 S4S, NATUR class
9,29 € HT11,15 € TTC
of which 0,04 € eco-contribution excl. VAT (0,05 € incl. VAT)
Board 28×95 Scandinavian pine/spruce planed S4S class AB
3,00 € HT3,60 € TTC
of which 0,02 € eco-contribution excl. VAT (0,02 € incl. VAT)
Alder planed board 28×90 S4S class AB
5,72 € HT6,86 € TTC
of which 0,02 € eco-contribution excl. VAT (0,02 € incl. VAT)
Planed board Thermo Sosna 26×68 S4S class AB
3,83 € HT4,60 € TTC
of which 0,01 € eco-contribution excl. VAT (0,01 € incl. VAT)
Planed board class NATUR Thermo Abachi (Ayous) 18×90
6,16 € HT7,39 € TTC
of which 0,01 € eco-contribution excl. VAT (0,01 € incl. VAT)
Planed board Thermo Sosna 19×68 S4S class AB
3,23 € HT3,88 € TTC
of which 0,01 € eco-contribution excl. VAT (0,01 € incl. VAT)
Top sellers in this category
Smooth Scandinavian spruce floorboard AB 2.8 x 19.6 cm
5,43 € HT6,52 € TTC
Thermo-treated oak slat 2,6 x 9,5 cm S4S natural
8,98 € HT10,78 € TTC
Thermo-treated Scandinavian pine cladding 4,2 x 9,2 cm class NATUREL
7,61 € HT9,13 € TTC
Planed spruce board 2,8 × 7 cm, class AB
2,20 € HT2,64 € TTC
Thermo-treated pine square timber 4,2 × 4,2 cm, natural grade
4,87 € HT5,84 € TTC
Our bench and backrest selection
- Alder grade A S4S 2.8 × 9 cm (rough timber, sold by the m²) — the traditional Finnish species.
- Thermally modified Scandinavian pine 4.2 × 9.2 cm, NATURAL grade — the modern alternative, brown tone.
- Thermally modified oak slat S4S 2.6 × 9.5 cm natural — premium, dense grain.
- Thermo abachi board 1.8 × 9 cm S4S Nature — pale African timber, very stable.
- Thermo pine board AB 1.9 or 2.6 × 6.8 to 9.2 cm — a range of sections.
- Thermo pine square and squared stock 4.2 × 4.2 and 4.2 × 6.8 cm — bearers and fittings.
- Planed spruce board AB 2.8 × 7 cm — standard cladding.
Skin-contact species compared
Alder — a soft timber, gentle against the skin, moderate thermal conductivity. The traditional species.
Thermally modified pine — the resin is driven off by the treatment, even brown tone, more stable. The modern alternative.
Thermally modified oak — dense, hard-wearing timber, top-of-the-range finish.
Thermo abachi — light, pale African timber, very low thermal conductivity (ideal for a bench).
Help & advice
Frequently asked questions
Everything you need to know before ordering. Another question? Contact us.
Alder remains the traditional Finnish timber: soft and resin-free. Thermally modified Scandinavian pine is a more stable, modern alternative. Thermo abachi is the least thermally conductive — ideal so it never burns on contact.
Roughly 1 m below the ceiling, where the heat gathers (steam rises). The lower bench (footrest level) sits 30-40 cm below the main one.
Pine and spruce contain resins that seep out at 80-100 °C — staining, a sticky feel and a risk of burns on contact. Thermal treatment drives these resins off, which makes both species suitable.
15 to 25 years with minimal upkeep. Thermally modified oak is very dense — it stands up well to wear and keeps a handsome brown tone over time.