EN 14951:2006

SLOVENSKI STANDARD
01-maj-2006
Notranje in zunanje obloge iz masivnega lesa listavcev – Elementi s profilom
Solid hardwood panelling and cladding - Machined profiles elements
Innen- und Außenbekleidungen aus massivem Laubholz -Profilholzelemente
Lambris et bardages en bois massif feuillus - Lames profilées usinées
Ta slovenski standard je istoveten z: EN 14951:2006
ICS:
79.060.99 'UXJHOHVQHSORãþH Other wood-based panels
79.080 Polizdelki iz lesa Semi-manufactures of timber
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 14951
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2006
ICS 79.060.99
English Version
Solid hardwood panelling and cladding - Machined profiles
elements
Lambris et bardages en bois massif feuillus - Lames Innen- und Außenbekleidungen aus massivem Laubholz -
profilées usinées Profilholzelemente
This European Standard was approved by CEN on 23 January 2006.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Central Secretariat or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,
Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2006 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14951:2006: E
worldwide for CEN national Members.

Contents Page
Foreword.3
Introduction .4
1 Scope.5
2 Normative references.5
3 Terms and definitions .5
4 Symbols and abbreviations .6
5 Requirements.6
5.1 General.6
5.2 Wood species.6
5.3 Appearance.6
5.3.1 General uses.6
5.3.2 Rules for the most commonly used species .7
5.3.3 Free class.17
5.3.4 Natural colours.17
5.4 Moisture content.17
5.5 Geometrical characteristics.17
5.5.1 General.17
5.5.2 Dimensional characteristics.17
5.5.3 Examples of profiles.18
5.5.4 Nominal dimensions.20
5.5.5 Permitted deviations from nominal dimensions of the element.20
5.5.6 Squareness and other angular deviations .20
5.5.7 Machining.21
5.6 Technical specifications and properties .21
5.6.1 Specific site requirements .21
5.6.2 Appearance.21
6 Sampling.22
7 Marking.22
Annex A (normative) Principles for the classification of the free class.23
Annex B (informative) Sampling in case of dispute .24
Bibliography .25

Foreword
This document (EN 14951:2006) has been prepared by Technical Committee CEN/TC 175 “Round and sawn
timber”, the secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by September 2006, and conflicting national standards shall be
withdrawn at the latest by September 2006.
This standard is one of a series of standards concerning solid wood panelling and wood flooring (including
parquet).
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden,
Switzerland and United Kingdom.

Introduction
This document specifies the characteristics of solid hardwood panelling and cladding elements. It is based upon
current dimensional standards within the industry and other characteristics together with functions that have
been verified by test.
A large amount of knowledge exists about solid hardwood panelling and cladding elements and values for
product characteristics are attested by long use and experience. It is therefore not necessary to have test results
for those products and species described.
The appearance of the hardwood panelling and cladding is mainly influenced by species, classification and the
pattern (e.g. the profile and system of assembly).
1 Scope
This document specifies the characteristics of solid hardwood panelling and cladding elements with or without
grooves and/or tongues, for interior or exterior use.
It does not cover characteristics of the possible coating system.
NOTE 1 Products sold in The European Economic Area will have to comply with prEN 14915.
NOTE 2 For softwood see EN 14519.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
EN 351-1, Durability of wood and wood-based products – Preservative-treated solid wood – Part 1:
Classification of preservative penetration and retention
EN 460, Durability of wood and wood-based products - Natural durability of solid wood - Guide of the durability
requirements for wood to be used in hazard classes
EN 844-9:1997, Round and sawn timber – Terminology – Part 9: Terms relating to features of sawn timber
EN 1309-1:1997, Round and sawn timber – Method of measurement of dimensions – Part 1: Sawn timber
EN 1310, Round and sawn timber - Method of measurement of features
EN 1311, Round and sawn timber - Method of measurement of biological degrade
EN 13183-1, Moisture content of a piece of sawn timber - Part 1: Determination by oven dry method
EN 13183-2, Moisture content of a piece of sawn timber - Part 2: Estimation by electrical resistance method
EN 13647, Wood and parquet flooring and wood panelling and cladding - Determination of geometrical
characteristics
EN 13756:2002, Wood flooring – Terminology
prEN 14915, Solid wood panelling and cladding - Characteristics, evaluation of conformity and marking
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 13756:2002, EN 844-9:1997 and EN
1309-1:1997 and the following apply.
3.1
panelling and cladding without tongue and groove
boards of solid wood without “tongue and groove” that have been machined on the face and two edges. The
back is either machined or hit and/or missed, depending on the product. The arrises may be chamfered or
rounded. For special purposes (for instance, acoustic) the edges may have fastening grooves. The ends of
the boards may be end-matched.
3.2
panelling and cladding with tongue and groove
tongued and grooved boards of solid wood which have been machined on the face and two edges. The back
is either machined or hit and/or missed, depending on the product. The ends of the boards may be end-
matched with tongue and groove.
3.3
panelling
rigid or semi-rigid elements of solid wood mainly for interior use
3.4
cladding
rigid or semi-rigid elements of solid wood mainly for exterior use
3.5
hit or missed
feature of the surface of a board where some areas of a face remain untouched during the planning process,
leaving a sawn or partially sawn finish
4 Symbols and abbreviations
Symbols and abbreviations used in this document are given in Figures 1 and 2 and in Tables 10 and 11.
5 Requirements
5.1 General
All requirements apply at the time of production, unless the manufacturer states otherwise. Finger jointing is
acceptable and has to be specified by the manufacturer.
NOTE The bonding should be appropriate for the intended use (see prEN 13307-2).
5.2 Wood species
The most commonly used hardwood species for wood panelling and cladding elements are those mentioned
in 5.3.2.1 to 5.3.2.4 (European species) and 5.3.2.5 (Tropical species and other species). Other species may
be used if indicated in contracts.
5.3 Appearance
5.3.1 General uses
The following tables identify the features, and their limits, that shall be considered with regard to the
appearance, use and general characteristics of the species where assigned to each grade.
Tables 1 to 9 define the classification relating to appearance rules for the face and for the non-visible parts
(back and edges) of an element of the most commonly used hardwood species for solid wood panelling and
cladding as defined in this standard.
Features shall be measured according to EN 1310 (knots assessed according to the general method of EN
1310). Biological alteration is measured according to EN 1311.
A classification with two appearance classes is specified, designated A and B.
A classification named "Free class" is based on the principles laid out in Annex A.
1)
The face shall include the entire visible surface of the element. It shall therefore extend to the chamfering , if
any.
The wood shall be free from shake and shall be sound.
Sapwood cannot always be distinguished and generally is not suitable for external use.
The boards may be finished with a surface coating. The grading is done before the coating is applied.
5.3.2 Rules for the most commonly used species
5.3.2.1 Quercus spp.(oak)
Rules for oak are given in Table 1

1) The chamfering is visible when elements are assembled.
Table 1 — Classification for Quercus spp.(oak)
Face of the element
b) c) d)
Features Class
A B
a)
Not permitted for
Sound sapwood
Not permitted for outdoor use,  outdoor use,
permitted for indoor use permitted for indoor
use
e)
Knots Permitted if: Permitted if:
Sound and intergrown ≤ 20% of the width of the element ≤ 50 % of the width of
...