
Description
Description
The alder bench module by Thermory is a ready-made sauna bench element measuring 1,600 × 600 × 140 mm, built from 90 mm alder boards with a 140 mm finger-jointed and glued front board. Alder is a traditional sauna timber with a light brown colour and warm pink undertones and a subtle scent like freshly cut hay; it does not overheat, repels water and carries a low risk of twisting or warping. The module can be cut down to length during installation and fixes to the sauna wall on supports, which makes it well suited to DIY projects; a central floor support with a minimum 28 × 42 mm cross section must be added beneath the bench and is not included. It is sold as a single 1,600 mm module, 600 mm wide, in alder.
Features
Technical Specification
| Timber | Alder |
| Module dimensions (L × W × T) | 1,600 × 600 × 140 mm |
| Front board | 140 mm, finger-jointed and glued |
| Individual board width | 90 mm |
| Grading | Thermory grades A and B, graded on the better face |
| Production tolerances | Thickness ±0.5 mm; cover width ±2.5%; length +10 mm / –3 mm per metre |
| Wall fixing | 5 × 100 mm screws, two per support; frame fixed to the wall at no more than 600 mm spacing |
| Front board fixing | 5 × 70 mm screws; on the 140 module the front board mounts on angle connectors |
| Central floor support | Minimum 28 × 42 mm cross section, required, not included |
| Manufacturer | Thermory AS |
Installation
Measure the sauna room first, allowing a gap of at least 4–5 mm between the bench and the wall at both ends. To shorten the module, detach the front board, unscrew the end piece of the frame, refit it at the required length, then saw the frame and front board to size; the bench grates are cut to length in the same way. Fasten the bench supports to the wall with a pair of 5 × 100 mm screws each, set both at the same height, then place the frame on the supports and screw it to the wall, including the back of the frame, at no more than 600 mm spacing; depending on the construction of the sauna room, longer screws may be required. Raised sections on the outer edges of the supports keep a ventilation gap between the wall and the bench. A wooden support with a minimum cross section of 28 × 42 mm must be installed between the centre of the bench and the floor; it is not included in the package. All wooden parts should be treated with a wood preservative, most conveniently before installation; the manufacturer cannot be held responsible for damage caused by incorrect installation or untreated timber. The full installation guide is available in the Downloads tab.
Timber
Alder is a popular choice in traditional saunas: it has a beautiful light brown colour with warm pink undertones, a subtle scent resembling freshly cut hay, and a low risk of twisting and warping. It does not overheat and has water-repellent properties, making it suitable for hot and humid environments. Boards are graded to Thermory’s published rules on the better face, with bench boards held to tighter straightness limits than wall panels.
Care
As a natural material, wood needs regular care to protect it against dirt and moisture; keeping the timber treated simplifies cleaning and showcases the surface of the wood.
Brand
Thermory, founded in Estonia in 1997, is the largest manufacturer of thermally modified wood in the world and supplies durable, chemical-free sauna timber alongside untreated species such as alder.
Ordering & Delivery
Shipping for timber orders is calculated at checkout and varies with size, quantity and postcode. Larger timber orders travel on a palletised service and may require a kerbside drop, so please read the shipping and delivery information before ordering.
Delivery & Returns
Delivery
We offer fast and reliable delivery to customers across the UK and beyond. For full details on shipping times and costs, please review our delivery policy.
Returns
We offer hassle-free returns within 30 days of purchase, so you can shop with complete confidence. For details, see our returns policy.
Warranty & Quality Promise
We are committed to delivering products of the highest quality, for details surrounding warranty please contact us.
Description
The alder bench module by Thermory is a ready-made sauna bench element measuring 1,600 × 600 × 140 mm, built from 90 mm alder boards with a 140 mm finger-jointed and glued front board. Alder is a traditional sauna timber with a light brown colour and warm pink undertones and a subtle scent like freshly cut hay; it does not overheat, repels water and carries a low risk of twisting or warping. The module can be cut down to length during installation and fixes to the sauna wall on supports, which makes it well suited to DIY projects; a central floor support with a minimum 28 × 42 mm cross section must be added beneath the bench and is not included. It is sold as a single 1,600 mm module, 600 mm wide, in alder.
Features
| Timber | Alder |
| Module dimensions (L × W × T) | 1,600 × 600 × 140 mm |
| Front board | 140 mm, finger-jointed and glued |
| Individual board width | 90 mm |
| Grading | Thermory grades A and B, graded on the better face |
| Production tolerances | Thickness ±0.5 mm; cover width ±2.5%; length +10 mm / –3 mm per metre |
| Wall fixing | 5 × 100 mm screws, two per support; frame fixed to the wall at no more than 600 mm spacing |
| Front board fixing | 5 × 70 mm screws; on the 140 module the front board mounts on angle connectors |
| Central floor support | Minimum 28 × 42 mm cross section, required, not included |
| Manufacturer | Thermory AS |
Installation
Measure the sauna room first, allowing a gap of at least 4–5 mm between the bench and the wall at both ends. To shorten the module, detach the front board, unscrew the end piece of the frame, refit it at the required length, then saw the frame and front board to size; the bench grates are cut to length in the same way. Fasten the bench supports to the wall with a pair of 5 × 100 mm screws each, set both at the same height, then place the frame on the supports and screw it to the wall, including the back of the frame, at no more than 600 mm spacing; depending on the construction of the sauna room, longer screws may be required. Raised sections on the outer edges of the supports keep a ventilation gap between the wall and the bench. A wooden support with a minimum cross section of 28 × 42 mm must be installed between the centre of the bench and the floor; it is not included in the package. All wooden parts should be treated with a wood preservative, most conveniently before installation; the manufacturer cannot be held responsible for damage caused by incorrect installation or untreated timber. The full installation guide is available in the Downloads tab.
Timber
Alder is a popular choice in traditional saunas: it has a beautiful light brown colour with warm pink undertones, a subtle scent resembling freshly cut hay, and a low risk of twisting and warping. It does not overheat and has water-repellent properties, making it suitable for hot and humid environments. Boards are graded to Thermory’s published rules on the better face, with bench boards held to tighter straightness limits than wall panels.
Care
As a natural material, wood needs regular care to protect it against dirt and moisture; keeping the timber treated simplifies cleaning and showcases the surface of the wood.
Brand
Thermory, founded in Estonia in 1997, is the largest manufacturer of thermally modified wood in the world and supplies durable, chemical-free sauna timber alongside untreated species such as alder.
Ordering & Delivery
Shipping for timber orders is calculated at checkout and varies with size, quantity and postcode. Larger timber orders travel on a palletised service and may require a kerbside drop, so please read the shipping and delivery information before ordering.
Delivery
We offer fast and reliable delivery to customers across the UK and beyond. For full details on shipping times and costs, please review our delivery policy.
Returns
We offer hassle-free returns within 30 days of purchase, so you can shop with complete confidence. For details, see our returns policy.
Warranty & Quality Promise
We are committed to delivering products of the highest quality, for details surrounding warranty please contact us.









