NEN EN 14951 : 2006

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviations
5 Requirements
  5.1 General
  5.2 Wood species
  5.3 Appearance
      5.3.1 General uses
      5.3.2 Rules for the most commonly used species
      5.3.3 Free class
      5.3.4 Natural colours
  5.4 Moisture content
  5.5 Geometrical characteristics
      5.5.1 General
      5.5.2 Dimensional characteristics
      5.5.3 Examples of profiles
      5.5.4 Nominal dimensions
      5.5.5 Permitted deviations from nominal dimensions
            of the element
      5.5.6 Squareness and other angular deviations
      5.5.7 Machining
  5.6 Technical specifications and properties
      5.6.1 Specific site requirements
      5.6.2 Appearance
6 Sampling
7 Marking
Annex A (normative) Principles for the classification of
        the free class
Annex B (informative) Sampling in case of dispute
Bibliography

Describes the characteristics of solid hardwood panelling and cladding elements with or without grooves and/or tongues, for interior or exterior use.