Rustic grade oak is characterised by the number of knots, and colour unevenness.
Rustic oak and has unlimited number of fine and up to 60 mm knots.
Fallen knots are being filled with special oak filler.
Small hallows are acceptable.
The central core is allowed.
Oak grain pattern is heavily exposed.
The wood products range includes natural-looking wood planks.
Natural wood-grained pattern is clearly visible.
The colour tones shows set of knots locations, unlimited number of small knots.
Allowed up to 20 mm knots, which are filled.
Sapwood, central core, cracks and knots on edge are not allowed.
Oak wood is carefully selected.
The natural wood tree-ring pattern and medullary rays are visible.
Single knots up to 5 mm allowed - no fillings.
Any other defects are not allowed.
The wood pattern and the wood colour tone depends on wood-tree pattern, what is typical for the oak wood texture.