
Description
Description
The Small Wood Barrel Sauna with Window in Black is Finnmark Sauna’s flat-packed outdoor barrel for 2–4 bathers, built from 40 mm thermally modified Nordic spruce staves milled by Thermory and finished in black on the exterior only; inside, the timber keeps its natural tone, so it shares every other detail with the natural-finish Small Wood Barrel Sauna with Window. A semi-panoramic window set into the upper rear panel opens the 5.6 m³ sauna room to its surroundings, thermo aspen benches sit over a duckboard floor, and the full-height 8 mm tempered glass door and included bitumen shingle roof complete the kit. The barrel measures 223 cm long and 194 cm in diameter, standing 204 cm tall on its cradles. Choose it without a heater, or with the electric heater package: a HUUM Drop 9 kW heater with the UKU Glass Wi-Fi controller and sauna stones. Moffett delivery to most mainland UK postcodes is included in the price.
Features
Technical Specification
| Capacity | 2–4 persons |
| External dimensions (L × W × H) | 2,230 × 1,940 × 2,040 mm |
| Barrel diameter | 1,940 mm |
| Sauna room volume | 5.6 m³ |
| Bench dimensions (L × D) | 1,971 × 497 mm |
| Wall construction | 40 mm Nordic thermo spruce staves |
| Interior timber | Thermo aspen benches and duckboard flooring |
| Door | 8 mm tempered glass, 1,540 × 620 mm, no lock (safety design) |
| Rear window | Semi-panoramic window in the upper rear panel |
| Roof covering | Bitumen shingles with underlay (included) |
| Exterior finish | Black (exterior only; natural interior) |
| Heater options | No heater, or HUUM Drop 9 kW electric heater with UKU Glass Wi-Fi controller and sauna stones |
| Gross weight (packed) | 590 kg |
| Packaging | OSB box, 1,110 × 2,270 × 850 mm |
| Warranty | 2-year manufacturer’s warranty on timber structures and housings |
| What’s included | |
| Frame | 40 mm Nordic thermo spruce stave kit |
| Foundation beams | 3 |
| Steel frame bands | 3 |
| Benches | 2 thermo aspen sauna benches |
| Flooring | Thermo aspen duckboard |
| Ventilation | Sauna ventilation valve |
| Heat shield | Ceiling heat shield with 30 mm spacers |
| Door | 8 mm tempered glass door, 1,540 × 620 mm, with mouldings and handles |
| Window | Semi-panoramic rear window panel |
| Roof | Bitumen shingles and self-adhesive underlay |
| Documentation | Assembly instructions in English |
| Foundation set-out | |
| Ground-contact cradles | 3 × 70 mm-wide cradles across the sauna |
| Cradle positions | Outer cradles 176 mm in from each end; one midway |
| Clear gap between cradles | 837 mm each side |
| Cradle footprint (L × W) | 1,884 × 1,500 mm |
Assembly
The sauna arrives as a complete flat-packed kit with an illustrated assembly manual in English; two people with ordinary hand tools can build it, pre-drilling before each stave is screwed home. The bitumen shingles are fitted with their own step-by-step guide, and the ceiling heat shield mounts above the heater position on 30 mm spacers. The glass door deliberately has no lock, a safety choice to prevent accidental entrapment; in strong winds, place a heavy object such as sturdy garden furniture in front of the door to keep it closed. Before the first session, heat the sauna to around 100 °C for two hours under supervision, keeping it well ventilated. An assembly service is available on request for a personalised quotation.
Foundations
The barrel stands on its support cradles and needs a firm, level base that stays free of standing water after rain; concrete, paving or compacted crushed stone is preferred. Screw piles are an alternative on softer ground. Check that the sauna will fit its chosen spot before you begin, allowing room to work around it.
Heater options
The dropdown offers the sauna without a heater, or with an electric heater package: the HUUM Drop 9 kW with the UKU Glass Wi-Fi controller and sauna stones. If you prefer a different model, select No Heater and add your chosen heater to the order; for commercial settings we recommend a commercial-grade heater. All electrical work, including heater installation, must be carried out by a qualified electrician. A compatible LED lighting kit and electrical box are sold separately. As an uninsulated outdoor structure, the sauna’s heat-up time will vary with the weather and the seasons.
Timber
The staves are 40 mm Nordic thermo spruce from Thermory, kiln-dried and then modified with heat and steam alone, with no chemical treatment. The process removes the sugars that invite rot, leaving a stable, moisture-resistant board with a brushed texture. On this model the exterior is finished in black, while the interior keeps the warm, even tone of the natural thermo timber.
Care
Treat the interior timber with a specialist sauna protection product before first use, such as Tikkurila Supi Saunasuoja for walls and ceilings and Supi Laudesuoja for the benches; protect the exterior with a suitable outdoor oil or stain, reapplied as it weathers. Ventilate and dry the sauna after every session, and never clean the interior with a pressure washer or running water. The full usage and maintenance guide is in the Downloads tab.
Brand
The barrel sauna range is designed by Finnmark Sauna, the UK sauna specialist, and built in the Nordics from Thermory thermo spruce.
Warranty
A 2-year manufacturer’s warranty covers the timber structures and housings. Following the usage and maintenance guide keeps the warranty valid; natural colour change and surface moisture marks are not covered.
Ordering & Delivery
The sauna ships flat-packed in an OSB box measuring 1,110 × 2,270 × 850 mm, and Moffett delivery to most mainland UK postcodes is included: a lorry with a rear-mounted forklift places the box outside your property. In-stock barrels are usually delivered within 3–8 working days once dispatch is agreed. Offshore and selected postcodes are quoted separately; the Delivery & Returns tab carries the full policy.
Downloads
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 Small Wood Barrel Sauna with Window in Black is Finnmark Sauna’s flat-packed outdoor barrel for 2–4 bathers, built from 40 mm thermally modified Nordic spruce staves milled by Thermory and finished in black on the exterior only; inside, the timber keeps its natural tone, so it shares every other detail with the natural-finish Small Wood Barrel Sauna with Window. A semi-panoramic window set into the upper rear panel opens the 5.6 m³ sauna room to its surroundings, thermo aspen benches sit over a duckboard floor, and the full-height 8 mm tempered glass door and included bitumen shingle roof complete the kit. The barrel measures 223 cm long and 194 cm in diameter, standing 204 cm tall on its cradles. Choose it without a heater, or with the electric heater package: a HUUM Drop 9 kW heater with the UKU Glass Wi-Fi controller and sauna stones. Moffett delivery to most mainland UK postcodes is included in the price.
Features
| Capacity | 2–4 persons |
| External dimensions (L × W × H) | 2,230 × 1,940 × 2,040 mm |
| Barrel diameter | 1,940 mm |
| Sauna room volume | 5.6 m³ |
| Bench dimensions (L × D) | 1,971 × 497 mm |
| Wall construction | 40 mm Nordic thermo spruce staves |
| Interior timber | Thermo aspen benches and duckboard flooring |
| Door | 8 mm tempered glass, 1,540 × 620 mm, no lock (safety design) |
| Rear window | Semi-panoramic window in the upper rear panel |
| Roof covering | Bitumen shingles with underlay (included) |
| Exterior finish | Black (exterior only; natural interior) |
| Heater options | No heater, or HUUM Drop 9 kW electric heater with UKU Glass Wi-Fi controller and sauna stones |
| Gross weight (packed) | 590 kg |
| Packaging | OSB box, 1,110 × 2,270 × 850 mm |
| Warranty | 2-year manufacturer’s warranty on timber structures and housings |
| What’s included | |
| Frame | 40 mm Nordic thermo spruce stave kit |
| Foundation beams | 3 |
| Steel frame bands | 3 |
| Benches | 2 thermo aspen sauna benches |
| Flooring | Thermo aspen duckboard |
| Ventilation | Sauna ventilation valve |
| Heat shield | Ceiling heat shield with 30 mm spacers |
| Door | 8 mm tempered glass door, 1,540 × 620 mm, with mouldings and handles |
| Window | Semi-panoramic rear window panel |
| Roof | Bitumen shingles and self-adhesive underlay |
| Documentation | Assembly instructions in English |
| Foundation set-out | |
| Ground-contact cradles | 3 × 70 mm-wide cradles across the sauna |
| Cradle positions | Outer cradles 176 mm in from each end; one midway |
| Clear gap between cradles | 837 mm each side |
| Cradle footprint (L × W) | 1,884 × 1,500 mm |
Assembly
The sauna arrives as a complete flat-packed kit with an illustrated assembly manual in English; two people with ordinary hand tools can build it, pre-drilling before each stave is screwed home. The bitumen shingles are fitted with their own step-by-step guide, and the ceiling heat shield mounts above the heater position on 30 mm spacers. The glass door deliberately has no lock, a safety choice to prevent accidental entrapment; in strong winds, place a heavy object such as sturdy garden furniture in front of the door to keep it closed. Before the first session, heat the sauna to around 100 °C for two hours under supervision, keeping it well ventilated. An assembly service is available on request for a personalised quotation.
Foundations
The barrel stands on its support cradles and needs a firm, level base that stays free of standing water after rain; concrete, paving or compacted crushed stone is preferred. Screw piles are an alternative on softer ground. Check that the sauna will fit its chosen spot before you begin, allowing room to work around it.
Heater options
The dropdown offers the sauna without a heater, or with an electric heater package: the HUUM Drop 9 kW with the UKU Glass Wi-Fi controller and sauna stones. If you prefer a different model, select No Heater and add your chosen heater to the order; for commercial settings we recommend a commercial-grade heater. All electrical work, including heater installation, must be carried out by a qualified electrician. A compatible LED lighting kit and electrical box are sold separately. As an uninsulated outdoor structure, the sauna’s heat-up time will vary with the weather and the seasons.
Timber
The staves are 40 mm Nordic thermo spruce from Thermory, kiln-dried and then modified with heat and steam alone, with no chemical treatment. The process removes the sugars that invite rot, leaving a stable, moisture-resistant board with a brushed texture. On this model the exterior is finished in black, while the interior keeps the warm, even tone of the natural thermo timber.
Care
Treat the interior timber with a specialist sauna protection product before first use, such as Tikkurila Supi Saunasuoja for walls and ceilings and Supi Laudesuoja for the benches; protect the exterior with a suitable outdoor oil or stain, reapplied as it weathers. Ventilate and dry the sauna after every session, and never clean the interior with a pressure washer or running water. The full usage and maintenance guide is in the Downloads tab.
Brand
The barrel sauna range is designed by Finnmark Sauna, the UK sauna specialist, and built in the Nordics from Thermory thermo spruce.
Warranty
A 2-year manufacturer’s warranty covers the timber structures and housings. Following the usage and maintenance guide keeps the warranty valid; natural colour change and surface moisture marks are not covered.
Ordering & Delivery
The sauna ships flat-packed in an OSB box measuring 1,110 × 2,270 × 850 mm, and Moffett delivery to most mainland UK postcodes is included: a lorry with a rear-mounted forklift places the box outside your property. In-stock barrels are usually delivered within 3–8 working days once dispatch is agreed. Offshore and selected postcodes are quoted separately; the Delivery & Returns tab carries the full policy.
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.









