Noki (Soot)
Noki is a deep, dark burnt brown shade that channels the strength and ruggedness of northern nature.
Applications
Manufacturing
Noki product is made by charring the wood surface at over 1000 °C using Hiil's charring technology. After charring, the product is pressure-washed with water, dried, brushed and oiled with black-tinted special linseed oil. The oil binds the char on the surface so that it does not dust or flake off.
Specifications
| Surface | Charred, washed, brushed, oiled, tinted black |
|---|---|
| Wood species | Pine, Kiertopuu® pine |
| Wood certification | PEFC certified |
| Planed thickness | 22, 28, 45 mm Note! Charring reduces the thickness of the wood piece by 0-3 millimetres and rounds the edges. |
| Width | 120, 145, 170, 195 mm |
| Panel overlap | -12 mm from width |
| Profiles |   |
| Country of origin | Finland |
| CE marking | Product is CE marked |
| Fire class | D class B-class when treated with fire retardant, spruce as material. |
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Weather exposure
Weather exposure test for Hiil Oy charred wood products
Natural Resources Institute Finland - 27 March 2025 results - Veikko Möttönen and Nina Pottonen.
Weather exposure test programme: 102 min UV exposure and 18 min UV+rain exposure, repeated over 6 weeks (1008 h). Equivalence: The treatment can be considered to correspond to approximately 3 years of outdoor exposure to rain and sunlight. UV radiation dose in the test was approximately 218 MJ/m².
Downloads
Find more on the Resources page.
Example projects using Noki
AITO Saunas’ charred wood cladding
AITO Sauna builds saunas where Finnish design meets everyday wellbeing. Hiil has supplied charred wood surfaces to AITO projects in Ibiza and beyond.
Kuusijärvi saunas – exterior cladding and decks in charred wood
Public smoke saunas and service buildings at Kuusijärvi – charred cladding and Noki decks connect the new to an old ritual.
Savorak piers in charred wood
Savorak’s pier range with Hiil Noki – a dark, calm surface for shores and water. Charring and oiling on all four sides support long-term durability.