Oak lamella grades
Grade (А / Select/ Prime)
Width, 67-130 mm
- sound knots up to 10 mm
- black pin knots up to 3 mm
- uniform colour
Grade (А / Select/ Prime)
Width, 130-305 mm
- sound knots up to 10 mm
- black pin knots up to 3 mm
- uniform colour
Grade (B / Nature)
Width, 67-130 mm
- sound knots up to 20 mm
- black knots and holes up to 10 mm, but at least 10 mm from the edges
- natural changes colourand structure
Grade (B / Nature)
Width, 130-305 mm
- sound knots up to 30 mm
- black knots and holes up to 10 mm, but at least 10 mm from the edges
- natural changes colourand structure
Grade (C / Nature)
Width, 67-130 mm
- sound knots up to 50 mm
- black knots and holes up to 20 mm
- holes and knots up to 10 mm, but at least 10 mm from the edges
- unexpressed core without a crack and a sharp change in colourup to 1/3 of the length of the lamella
- natural changes colour
Grade (С / Nature)
Width, 130-305 mm
- sound knots up to 70 mm
- black knots and holes up to 40 mm
- holes and knots up to 20 mm, but at least 10 mm from the edges
- heart core
- cracks up to 200 mm
- natural changes colour
- grown bark up to 50 mm
Grade (D / Rustic)
Width, 67-130 mm
- sound knots up to 50 mm
- black knots up to 50 mm
- holes and dropped out knots up to 30 mm, but at least 10 mm from the edges
- heart core is allowed along the whole length
- cracks which do not destroy the lamella’s structure
- strong change colour
- grown bark without rot
Grade (D / Rustic)
Width, 130-305 mm
- sound knots up to 90 mm
- black knots up to 60 mm
- holes and dropped out knots up to 40 mm, but at least 10 mm from the edges
- heart core is allowed along the whole length
- cracks which do not destroy the lamella’s structure
- strong change colour
- grown bark without rot
Grade (2D / Rustic)
Width, 67-130 mm
- knots are allowed, including side knots
- dark knots without restrictions
- single holes not in groups up to 50 mm
- heart core
- grown bark up to 200 mm
- natural changes in colour
Grade (2D / Rustic)
Width, 130-305 mm
- knots are allowed, including side knots
- dark knots without restrictions
- single holes not in groups up to 50 mm
- heart core
- grown bark up to 200 mm
- natural changes in colour