The grain size combined with the toasting level must be adapted to the grape varieties and the wine making style. Usually, fine grained wood is preferred for long ageing. Semi-fine and medium grains work well for shorter ageing programs.
Tight grain
• Maximum 2 mm between growth rings.
• Main origins: Allier, Vosges and Romania.
Semi-fine grain
• From 2 to 6 mm between growth rings.
• Main origins: Nevers, Vosges and Romania.
Medium grain
• From 6 mm and more between growth rings.
• Main origins: Nevers and Limousin.
The American oak is a blend of fine, semi fine and medium grains.
