Humidity of the wood:

9% ± 2%

Dimensions of parquet:

  • thickness: 10 mm, 16 mm, 22 mm
  • width: 42 - 70 mm
  • length: 200 - 500 mm

Dimensional tolerance: ±0,2 mm

  • Due to the inevitable differences in the sorting process a specified class as much as 2% wooden flooring of lower quality is acceptable (in accordance with DIN 280 paragraph 4.1).
  • The quality is estimated in accordance with the defects incurred on the upper plane.
  • Grinning of the wood and the annual rings as well as knags less than 3 mm not to be taken into account.
  • The core is acceptable on the lower plane.
  • Advanced decay is not acceptable on both planes.
  • Incipient decay on the left plane is acceptable as belts of maximal depth of 5 mm and covering no more than 10% of the total surface (excluding class Natur).
  • All defects not mentioned in clause 3.2. or those which occur on larger scale to be accepted on the left side.

Detailed requirements - acceptable wood defects - Oak flooring


  • no defects
  • natural color of wood


  • without sapwood;
  • unnatural dye penetrations;
  • sound knots set not larger than 10 mm;
  • knots partially set, partially decay not larger than 5 mm, not set;
  • shallow superficial cracks not longer than 20 mm;
  • front cracks single not longer than 5 mm, affecting the right plane.


  • sapwood - up to 50 % of the upper plane
  • sound knots, light, not in contrast with the color of wood, not larger than 5 mm, single
  • varied color of wood, natural dye penetrations;
  • shallow superficial cracks depth no more than 1 mm and length no more than 20 mm

The range of acceptable manufacturing defects:

  • the upper plane: wavy finish not deeper than 0,3 mm;
  • the lower plane: wood decrements up to 2 mm deep, width up to 5 mm and up to the 1/3 of the flooring unit length;
  • sides: decrements and pulled grains up to 0,3 mm;
  • fronts: the aberration of the axis of symmetry up to 0,5 % of the unit' s total width;
  • Tongues and grooves must ensure proper contact of the wood flooring units when laid on floors in order to prevent from slits all over the floor plane.

Storage conditions

The parquet needs to be stored in a dry and well ventilated place, not exposed to the sun and rain. The packages to be isolated off the ground.


The parquet to be transported by covered means of transport. The packages must be firmly secured to prevent their movement and damage during the transportation.