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EUROPEAN OAK - GRADING CRITERIA
Raw Material Grading
GRADE 2
NATURE/ PRIME
KNOTS
1 - 6 knots per plank.
Sound knots up to 5 mm.
SAPWOOD
Sapwood up to 5 mm per each edge.
COLOUR VARIATION & SHAKE
No shake.
Colour variation is allowed.
GRADE 3
COUNTRY
KNOTS
Unlimited knots.
Sound knots and Dead knots up to 40 mm.
SAPWOOD
Sapwood up to 20 mm per each edge.
COLOUR VARIATION & SHAKE
Shake and Colour variation are allowed.
GRADE 2/3
SOUND KNOTTY
KNOTS
5 - 6 knots per plank.
Sound knots up to 30 mm.
Dead knots up to 20 mm.
SAPWOOD
Sapwood up to 20 mm per each edge.
COLOUR VARIATION & SHAKE
No shake.
Colour variation is allowed.
GRADE 4
RUSTIC
KNOTS
Unlimited knots.
Sound knots and Dead knots up to 40 mm.
SAPWOOD
Sapwood up to 40 mm per each edge.
COLOUR VARIATION & SHAKE
Shake and Colour variation are allowed.
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