The classification of species for parquet is characterized by resistance to punching which influences the wear of the surface.
The harder the wood is and the less the surface is degraded.
The harder and the thicker the wear layer is, the greater the restoration (by sanding) of wooden floors is.
Hardness range depending on the thickness of the wear layer
|Wood species hardness scale||Class of wood flooring according to the minimum of the upper layer thickness (mm)|
|>=2,5 mm||>=3,2 mm||>=4,5 mm||>=7 mm|
|Class A||(Very little hard wood) hardness between 10 and 20.N / Nmm≈: spruce, pine, fir and alder.|
|Class B||(Semi-hard wood) hardness between 20 and 30. N / Nmm≈: brushed birch, teak, chestnut, larch, cherry, walnut, maritime pine and Sipo.|
|Class C||(Hard wood) hardness between 30 and 40 N / mm≈: afrormosia, oak, doussie, maple, eucalyptus, ash, Guatambu, beech, iroko, makore, Moabi, movingui, elm, hornbeam, acacia.|
|Class D||(very hard wood) hardness greater than 40 N / mm≈: angelica, cabreuva, cumaru, ipe, jatoba, sucupira and wenge.|
What hardness range, for what purpose?
|Range||Type of use|
|21||Low passage, bedroom and residential corridors without access to the outside.|
|22||Average passage without access to the outside stay and apartment hallway.|
|23||Intense passage room with access to the outside or professional use.|
|Public or commercial use|
|31||Moderate, low or intermittent passage|
|32||Average passage, library, places of worship, shop without direct access to the outside.|
|33||Intense passage, boutique with direct access to the outside, plan offices, staircases.|
|34||High traffic, commercial use.|
|Light industrial use|
|41||Moderate passage area where the work is essentially sedentary with occasional use of light vehicle, factory workshop.|
|42||Area where the work is performed essentially standing and / or with vehicle traffic.|
|43||Important passage, other light industrial areas.|