Wood flooring - Solid wood overlay flooring elements including blocks with an interlocking system

This European Standard specifies the characteristics of solid wood overlay flooring including blocks with an interlocking system for internal use as flooring. It applies to elements. This standard does not apply to panels made from elements, for which a separate standard) is in course of preparation.
This standard covers elements with and without surface coating.

Holzfussböden - Massivholz-Overlay-Parkettstäbe einschliesslich mit einem Verbindungssystem

Diese Europäische Norm legt die Merkmale von Overlay-Massivholzparkett einschließlich Parkettblöcken mit
einem Verbindungssystem für die Verwendung als Fußbodenbelag in Innenräumen fest. Sie bezieht sich auf
Elemente.
Diese Norm gilt für Elemente mit und ohne Oberflächenbehandlung.

Plancher en bois - Lames de parquets en bois massifs de recouvrement, blocs anglais compris, avec systèmes de guidage

La présente norme européenne définit les caractéristiques des parquets en bois massif de recouvrement, blocs anglais compris, avec un système de guidage pour utilisation en intérieur comme plancher.  Elle s’applique aux éléments. La présente norme ne s’applique pas aux panneaux constitués d’éléments pour lesquels une norme spécifique est en cours de préparation.
La présente norme couvre les éléments avec et sans traitement de surface.

Lesene talne obloge - Masivne lesene talne obloge, vključno s kockami za sisteme zapore

Ta evropski standard opredeljuje značilnosti masivnih lesenih talnih oblog, vključno s kockami za sisteme zapore, za notranjo uporabo kot talne obloge. Velja za elemente. Ta standard ne velja za plošče, narejene iz elementov, za katere je v pripravi ločen standard.
Ta standard zajema elemente s površinskim premazom in brez njega.

General Information

Status
Published
Public Enquiry End Date
27-Feb-2010
Publication Date
14-Sep-2011
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Jul-2011
Due Date
05-Sep-2011
Completion Date
15-Sep-2011

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Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.]DSRUHHolzfussböden - Massivholz-Overlay-Parkettstäbe einschliesslich mit einem VerbindungssystemPlancher en bois - Lames de parquets en bois massifs de recouvrement, blocs anglais compris, avec systèmes de guidageWood flooring - Solid wood overlay flooring elements including blocks with an interlocking system97.150Netekstilne talne oblogeNon-textile floor coverings79.080Polizdelki iz lesaSemi-manufactures of timberICS:Ta slovenski standard je istoveten z:EN 13228:2011SIST EN 13228:2011en,fr,de01-oktober-2011SIST EN 13228:2011SLOVENSKI
STANDARDSIST EN 13228:2003/AC:2007SIST EN 13228:20031DGRPHãþD



SIST EN 13228:2011



EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 13228
May 2011 ICS 79.080 Supersedes EN 13228:2002English Version
Wood flooring - Solid wood overlay flooring elements including blocks with an interlocking system
Plancher en bois - Eléments de parquets en bois massifs de recouvrement, blocs anglais compris, avec systèmes de guidage
Holzfußböden - Massivholz-Overlay-Parkettstäbe einschließlich Parkettblöcke mit einem VerbindungssystemThis European Standard was approved by CEN on 14 April 2011.
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 CEN-CENELEC Management Centre 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 CEN-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, 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:
Avenue Marnix 17,
B-1000 Brussels © 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13228:2011: ESIST EN 13228:2011



EN 13228:2011 (E) 2 Contents Page Foreword .3 Introduction .4 1 Scope .5 2 Normative references .5 3 Terms and definitions .6 4 Symbols and abbreviations .6 5 Specific product requirements .7 5.1 Wood species .7 5.2 Appearance .7 5.2.1 General rules .7 5.2.2 Rules for the most commonly used species .8 5.2.3 Free class . 14 5.2.4 Natural colours . 14 5.3 Moisture content . 14 5.4 Geometrical characteristics . 14 5.4.1 General . 14 5.4.2 Profile . 14 5.4.3 Nominal dimensions . 16 5.4.4 Limit deviations . 17 5.4.5 Machining . 18 5.5 Technical specifications and properties . 18 5.5.1 Technical characteristics required when in service . 18 5.5.2 Appearance . 18 5.5.3 Renovation and repair . 18 6 Marking . 19 Annex A (informative)
Botanical and trade names of the most commonly used species for wood flooring (hardwood and softwood species) . 20 Annex B (normative)
Principles for the classification of the free class . 26 Bibliography . 28
SIST EN 13228:2011



EN 13228:2011 (E) 3 Foreword This document (EN 13228:2011) 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 November 2011, and conflicting national standards shall be withdrawn at the latest by November 2011. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 13228:2002. In this European Standard the Annex A is informative and Annex B is normative. Compared with EN 13228:2002, the following modifications have been made: a) Modification of the 2nd sentence of the scope; b) Modification of dimensional characteristics of overlay flooring element (5.4.2.2); c) Editorial modification on row 7 of Table 8 of 5.4.4.1; d) Modification of limit deviation of cup (5.4.4.3), bow (5.4.4.4), spring (5.4.4.5); e) Deletion of "specific site requirements" (5.5.2); f) Updating of Clause 2 "Normative references" and bibliography. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, 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 the United Kingdom. SIST EN 13228:2011



EN 13228:2011 (E) 4 Introduction This standard is one of a series of standards about wood flooring and wood panelling and cladding. This standard specifies the characteristics of solid wood flooring elements. It is based upon current dimensional standards used in the industry and other characteristics together with functions which have been verified by test. A large amount of knowledge exists about solid wood flooring elements and values for product characteristics are attested by long use and experience. It is therefore not necessary to have test results. For new products technical data will have to be verified by testing. The appearance of the wood flooring is mainly influenced by species, classification and the pattern. SIST EN 13228:2011



EN 13228:2011 (E) 5 1 Scope This European Standard specifies the characteristics of solid wood overlay flooring including blocks with an interlocking system for internal use as flooring. It applies to elements. This standard covers elements with and without surface coating. 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 844-1:1995, Round and sawn timber  Terminology  Part 1: General terms common to round timber and sawn timber EN 844-3:1995, Round and sawn timber  Terminology  Part 3: General terms relating to sawn timber EN 844-4:1997, Round and sawn timber  Terminology  Part 4: Terms relating to moisture content EN 844-6:1997, Round and sawn timber  Terminology  Part 6: Terms relating to dimensions of sawn timber EN 844-9:1997, Round and sawn timber  Terminology  Part 9: Terms relating to features of sawn timber EN 844-10:1998, Round and sawn timber  Terminology  Part 10: Terms relating to stain and fungal attack EN 844-11:1998, Round and sawn timber  Terminology  Part 11: Terms relating to degrade by insects EN 844-12:2000, Round and sawn timber  Terminology  Part 12: Additional terms and general index EN 1310:1997, Round and sawn timber  Method of measurement of features EN 1311, Round and sawn timber  Method of measurement of biological degrade EN 1534, Wood flooring  Determination of resistance to indentation
 Test method 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 flooring and wood panelling and cladding  Determination of geometrical characteristics EN 13756:2002, Wood flooring  Terminology SIST EN 13228:2011



EN 13228:2011 (E) 6 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 844-1:1995, EN 844-3:1995, EN 844-4:1997, EN 844-6:1997, EN 844-9:1997, EN 844-10:1998, EN 844-11:1998, EN 844-12:2000 and in EN 13756:2002 and the following apply: 3.1 block element with an interlocking system NOTE It is defined by the relevant dimensional limits in 5.4.3 and Tables 7 and 8. 3.2 overlay flooring element element with an interlocking system with a thickness which renders it suitable for laying on a continuous supporting surface
[EN 13756:2002] 3.3 interlocking system system of assembly based upon a male and a female profile that does not have a load-bearing function, allowing the positioning of elements during installation
[EN 13756:2002]
3.4 thickness above the groove thickness between the face and any discontinuity such as a change in the profile (excluding chamfering), a groove/glue pocket or a glue line (excluding the glue line of finger-joints)
[EN 13756:2002] 4 Symbols and abbreviations L Length of the face of the element b Width of the face of the element b1 Depth of the female profile b2 Width of the male profile b3 Undercut t Thickness between the face and the back of the element t1 Thickness above the groove t2 Width of the female profile t3 Thickness of the male profile t4 Thickness of the part below the male profile α Angle that an edge makes to a plane normal to adjacent face, in degrees SIST EN 13228:2011



EN 13228:2011 (E) 7 5 Specific product requirements 5.1 Wood species A list of the most commonly used species for wood flooring elements as described in this standard is given in
Annex A. 5.2 Appearance
5.2.1 General rules Tables 1 to 6 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 species for solid wood flooring as defined in this standard. Features shall be measured according to EN 1310 (knots assessed according to the general method of 4.1 in EN 1310:1997). Bio deterioration is measured according to EN 1311. A classification with three appearance classes is specified, designated {, ∆ and …. A classification named "Free class" is based on the principles laid out in Annex B. To allow for unavoidable classification differences, 3 % of the strips in a batch may be other classes. Any additional strips from other classes are allowed as long as the general impression of the floor is not disturbed. The face shall include all the visible surface of the element. It shall therefore extend to the chamfering1)
if any. The face shall be free from shake and the wood shall be sound. Any continuous glue joint which allows renovation without significantly changing the appearance or the functional characteristics is acceptable.
1) The chamfering is visible when elements are assembled. SIST EN 13228:2011



EN 13228:2011 (E) 8 5.2.2 Rules for the most commonly used species 5.2.2.1 Quercus spp. (oak) Rules for oak are given in Table 1. Table 1 — Classification for Quercus spp. (oak) Face of the element
Features Class { ∆∆∆∆ … Sound sapwood Not permitted Permitted Slight traces permitted Knots
Sound and intergrown
Unsound knots Permitted if: diameter ≤ 2 mm
Not permitted Permitted if: diameter ≤ 5 mm
diameter ≤ 3 mm Permitted if: diameter ≤ 15 mm
diameter ≤ 10 mm Checks Not permitted Permitted up to 15 mm in length All features permitted without limit to size or quantity if these do not impair the strength or the wearing quality of the wood flooring. Bark pockets Not permitted Not permitted Lightning shake Not permitted Not permitted Slope of grain Permitted, no limit Permitted, no limit
Colour variation Slight variation permitted Permitted a
Medullary ray Permitted Permitted Biodeterioration Not permitted Not permitted Not permitted, except blue stain and black holes Non-visible parts All features permitted without limit to size or quantity if these do not impair the strength or the wearing quality of the wood flooring. Sound sapwood is permitted from the back up to the upper part of the male profile of the interlocking system without taking into account the limits set for the face. a Brown oak.
SIST EN 13228:2011



EN 13228:2011 (E) 9
5.2.2.2 Fraxinus excelsior (European ash) and Acer spp. (maple) Rules for European ash and maple are given in Table 2. Table 2 — Classification for Fraxinus excelsior (European ash) and Acer spp. (maple) Face of the element
Features Class { ∆∆∆∆ … Sound sapwood Not applicable Not applicable Not applicable Knots
Sound and intergrown
b < 70 mm
b ≥ 70 mm
Unsound knots Permitted if:
diameter ≤ 2 mm diameter ≤ 3 mm
Not permitted Permitted if:
diameter ≤ 5 mm diameter ≤ 10 mm
diameter ≤ 3 mm Permitted if:
diameter ≤ 15 mm diameter ≤ 30 mm
diameter ≤ 10 mm Checks Not permitted Not permitted Not permitted Bark pockets Not permitted Not permitted Not permitted Lightning shake Not permitted Not permitted Not permitted Slope of grain Permitted, no limit Permitted, no limit Permitted, no limit Colour variation Slight variation permitted. Slight traces of natural discoloration (mineral lines) permitted. Permitted Permitted Stick marks Not permitted Permitted Permitted Biodeterioration Not permitted Not permitted Not permitted, except blue stain and black holes Non-visible parts All features permitted without limit to size or quantity if these do not impair the strength or the wearing quality of the wood flooring.
SIST EN 13228:2011



EN 13228:2011 (E) 10
5.2.2.3 Fagus sylvatica (European beech) Rules for European beech are given in Table 3. Table 3 — Classification for Fagus sylvatica (European beech) Face of the element
Features Class { ∆∆∆∆ … Sound sapwood Not applicable Not applicable Not applicable Knots
Sound and intergrown
b < 70 mm
b ≥ 70 mm
Unsound knots Permitted if:
diameter ≤ 2 mm diameter ≤ 3 mm
Not permitted Permitted if:
diameter ≤ 5 mm diameter ≤ 10 mm
diameter ≤ 3 mm Permitted if:
diameter ≤ 15 mm diameter ≤ 30 mm
diameter ≤ 10 mm Checks Not permitted Not permitted Not permitted Bark pockets Not permitted Not permitted Not permitted Lightning shake Not permitted Not permitted Not permitted Slope of grain Permitted, no limit Permitted, no limit Permitted, no limit Colour variation Slight variation permitted a. Slight traces of natural discoloration
permitted. Permitted Permitted Red heart Not permitted Permitted Permitted Stick marks Not permitted Permitted Permitted Medullary ray Permitted Permitted Permitted Biodeterioration Not permitted Not permitted Not permitted, except blue stain and black holes Non-visible parts All features permitted without limit to size or quantity if these do not impair the strength or the wearing quality of the wood flooring. a Permitted for steamed beech.
SIST EN 13228:2011



EN 13228:2011 (E) 11
5.2.2.4 Betula spp. (birch) Rules for birch are given in Table 4. Table 4 — Classification for Betula spp. (birch) Face of the element
Features Class { ∆∆∆∆ … Sound sapwood Not applicable Not applicable Not applicable Knots
Sound and intergrown
b < 70 mm
b ≥ 70 mm
Unsound knots Permitted if:
diameter ≤ 2 mm diameter ≤ 3 mm
Not permitted Permitted if:
diameter ≤ 5 mm diameter ≤ 10 mm
diameter ≤ 3 mm Permitted if:
diameter ≤ 15 mm diameter ≤ 30 mm
diameter ≤ 10 mm Checks Not permitted Not permitted Not permitted Bark pockets Not permitted Not permitted Not permitted Lightning shake Not permitted Not permitted Not permitted Slope of grain Permitted, no limit Permitted, no limit Permitted, no limit Biodeterioration Not permitted Not permitted Not permitted, except blue stain and black holes Stick marks Not permitted Permitted Permitted Colour variation Slight variation permitted. Slight traces of natural discoloration and mineral lines permitted. Permitted Permitted Non-visible parts All features permitted without limit to size or quantity if these do not impair the strength or the wearing quality of the wood flooring.
SIST EN 13228:2011



EN 13228:2011 (E) 12
5.2.2.5 Castanea sativa spp. (sweet chestnut) Rules for sweet chestnut are given in Table 5. Table 5 — Classification for Castanea sativa spp. (sweet chestnut) Face of the element
Features Class { ∆∆∆∆ … Sound sapwood Not permitted Not permitted Slight traces permitted Knots
Sound and intergrown
b < 70 mm
b ≥ 70 mm
Unsound knots Permitted if:
diameter ≤ 2 mm diameter ≤ 3 mm
diameter ≤ 1 mm Permitted if:
diameter ≤ 5 mm diameter ≤ 10 mm
diameter ≤ 3 mm Permitted if:
diameter ≤ 15 mm diameter ≤ 30 mm
diameter ≤ 10 mm Yellow stain Not permitted 50 % permitted Permitted Checks Not permitted Permitted when the length ≤ width of the element Permitted when the length ≤ 50 % of the length of the element Bark pockets Not permitted Not permitted Permitted Lightning shake Not permitted Not permitted Permitted Slope of grain Permitted, no limit Permitted, no limit Permitted, no limit Colour variation Slight variation permitted. Permitted Permitted
Biodeterioration Not permitted Not permitted Not permitted Non-visible parts All features permitted without limit to size or quantity if these do not impair the stren
...

SLOVENSKI STANDARD
oSIST prEN 13228:2010
01-januar-2010
/HVHQHWDOQHREORJH0DVLYQHOHVHQHWDOQHREORJHYNOMXþQRVNRFNDPL]DVLVWHPH
]DSRUH
Wood flooring - Solid wood overlay flooring elements including blocks with an
interlocking system
Holzfussböden - Massivholz-Overlay-Parkettstäbe einschliesslich mit einem
Verbindungssystem
Plancher en bois - Lames de parquets en bois massifs de recouvrement, blocs anglais
compris, avec systèmes de guidage
Ta slovenski standard je istoveten z: prEN 13228 rev
ICS:
79.080 Polizdelki iz lesa Semi-manufactures of timber
oSIST prEN 13228:2010 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN 13228:2010

---------------------- Page: 2 ----------------------
oSIST prEN 13228:2010


EUROPEAN STANDARD
DRAFT
prEN 13228
NORME EUROPÉENNE

EUROPÄISCHE NORM

November 2009
ICS 79.080 Will supersede EN 13228:2002
English Version
Wood flooring - Solid wood overlay flooring elements including
blocks with an interlocking system
Plancher en bois - Lames de parquets en bois massifs de Holzfussböden - Massivholz-Overlay-Parkettstäbe
recouvrement, blocs anglais compris, avec systèmes de einschliesslich mit einem Verbindungssystem
guidage
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 175.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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 CEN Management Centre has the
same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.


EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 13228:2009: E
worldwide for CEN national Members.

---------------------- Page: 3 ----------------------
oSIST prEN 13228:2010
prEN 13228:2009 (E)
Contents Page
Foreword .3
Introduction .4
1 Scope .5
2 Normative references .5
3 Terms and definitions .6
4 Symbols and abbreviations .6
5 Specific product requirements .7
5.1 Wood species .7
5.2 Appearance .7
5.2.1 General rules .7
5.2.2 Rules for the most commonly used species .8
5.2.3 Free class . 14
5.2.4 Natural colours . 14
5.3 Moisture content . 14
5.4 Geometrical characteristics . 14
5.4.1 General . 14
5.4.2 Profile . 14
5.4.3 Nominal dimensions . 16
5.4.4 Limit deviations . 17
5.4.5 Machining . 18
5.5 Technical specifications and properties . 18
5.5.1 Technical characteristics required when in service . 18
5.5.2 Appearance . 19
5.5.3 Renovation and repair . 19
6 Marking . 20
Annex A (informative) Botanical and standard names of the most commonly used species for
wood flooring (hardwood and softwood species) . 21
Annex B (normative) Principles for the classification of the free class . 27
Bibliography . 29

2

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oSIST prEN 13228:2010
prEN 13228:2009 (E)
Foreword
This document (prEN 13228:2009) has been prepared by Technical Committee CEN/TC 175 “Round and
sawn timber”, the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 13228:2002.
Compared with EN 13228:2002, the following modifications have been made :
nd
a) Modification of the 2 sentence of the scope;
b) Modification of dimensional characteristics of overlay flooring element (5.4.2.2);
c) Modification of tolerance on length (Table 8 of 5.4.4.1);
d) Modification of limit deviation of cup (5.4.4.2), bow (5.4.4.4), spring (5.4.4.5);
e) Deletion of "specific site requirements (5.5.2);
f) Updating of Clause 2 "Normative references" and Bibliography.
3

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oSIST prEN 13228:2010
prEN 13228:2009 (E)

Introduction
This European Standard is one of a series of standards about wood flooring and wood panelling and cladding.
This standard specifies the characteristics of solid wood flooring elements. It is based upon current dimensional
standards used in the industry and other characteristics together with functions which have been verified by test.
A large amount of knowledge exists about solid wood flooring elements and values for product characteristics
are attested by long use and experience. It is therefore not necessary to have test results. For new products
technical data will have to be verified by testing.
The appearance of the wood flooring is mainly influenced by species, classification and the pattern.
4

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oSIST prEN 13228:2010
prEN 13228:2009 (E)
1 Scope
This European Standard specifies the characteristics of solid wood overlay flooring including blocks with an
interlocking system for internal use as flooring. It applies to elements. This standard does not apply to panels
)
made from elements, for which a separate standard is in course of preparation.
This standard covers elements with and without surface coating.
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 844-1:1995, Round and sawn timber – Terminology – Part 1: General terms common to round timber and
sawn timber.
EN 844-3:1995, Round and sawn timber – Terminology – Part 3: General terms relating to sawn timber.
EN 844-4:1997, Round and sawn timber – Terminology – Part 4: Terms relating to moisture content.
EN 844-6:1997, Round and sawn timber – Terminology - Part 6: Terms relating to dimensions of sawn timber.
EN 844-7:1997, Round and sawn timber – Terminology - Part 7: Terms relating to anatomical structure of
timber.
EN 844-9:1997, Round and sawn timber – Terminology - Part 9: Terms relating to features of sawn timber.
EN 844-10:1998, Round and sawn timber – Terminology - Part 10: Terms relating to stain and fungal attack.
EN 844-11:1998, Round and sawn timber – Terminology - Part 11: Terms relating to degrade by insects.
EN 844-12:2000, Round and sawn timber – Terminology - Part 12: Additional terms and general index.
EN 1310:1997, Round and sawn timber - Method of measurement of features.
EN 1311, Round and sawn timber - Method of measurement of biological degrade.
EN 1534, Wood and parquet flooring – Determination of resistance to indentation (Brinell) - Test method.
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 – Measurement of geometrical
characteristics.
EN 13756:2002, Wood flooring – terminology.
5

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oSIST prEN 13228:2010
prEN 13228:2009 (E)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 844-1:1995, EN 844-3:1995, EN
844-4:1997, EN 844-6:1997, EN 844-9:1997, EN 844-10:1998, EN 844-11:1998, EN 844-12:2000 and in EN
13756:2002 and the following apply:
3.1
block
element with an interlocking system, defined by the relevant dimensional limits in 5.4.3 and Tables 7 and 8.
3.2
overlay flooring element
element with an interlocking system with a thickness which renders it suitable for laying on a continuous
supporting surface
[EN 13756:2002]
3.3
interlocking system
system of assembly based upon a male and a female profile that does not have a load-bearing function,
allowing the positioning of elements during installation
[EN 13756:2002]
3.4
thickness above the groove
thickness between the face and any discontinuity such as a change in the profile (excluding chamfering), a
groove/glue pocket or a glue line (excluding the glue line of finger-joints)
[EN 13756:2002]
4 Symbols and abbreviations
L Length of the face of the element
b Width of the face of the element
b Depth of the female profile
1
b Width of the male profile
2
b Undercut
3
t Thickness between the face and the back of the element
t Thickness above the groove
1
t Width of the female profile
2
t Thickness of the male profile
3
t Thickness of the part below the male profile
4
α Angle that an edge makes to a plane normal to adjacent face, in degrees.

6

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oSIST prEN 13228:2010
prEN 13228:2009 (E)

5 Specific product requirements
5.1 Wood species
A list of the most commonly used species for wood flooring elements as described in this standard is given in
Annex A.
5.2 Appearance
5.2.1 General rules
Tables 1 to 6 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 species for solid wood flooring as defined in this
standard.
Features shall be measured according to EN 1310 (knots assessed according to the general method of 4.1 in
EN 1310:1997). Biodeterioration is measured according to EN 1311.
A classification with three appearance classes is specified, designated�, ∆ and �.
A classification named "Free class" is based on the principles laid out in Annex B.
1)
The face shall include all the visible surface of the element. It shall therefore extend to the chamfering if
any.
The face shall be free from shake and the wood shall be sound.
Any continuous glue joint which allows renovation without significantly changing the appearance or the
functional characteristics is acceptable.



1) the chamfering is visible when elements are assembled.
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oSIST prEN 13228:2010
prEN 13228:2009 (E)
5.2.2 Rules for the most commonly used species
5.2.2.1 Quercus spp. (oak)
Rules for oak are given in Table 1.
Table 1 — Classification for Quercus spp. (oak)
Face of the element
Class
Features
� ∆∆ �
∆∆
Sound sapwood Not permitted Permitted Slight traces
permitted
Knots Permitted if: Permitted if: Permitted if:
Sound and intergrown
diameter ≤ 2 mm diameter ≤ 5 mm diameter ≤ 15 mm


Unsound knots Not permitted
diameter ≤ 3 mm diameter ≤ 10 mm
Checks Not permitted Permitted up to 15 mm
in length
Bark pockets Not permitted Not permitted
All features
permitted without
limit to size or
Lightning shake Not permitted Not permitted
quantity if these do
not impair the
Slope of grain Permitted, no limit Permitted, no limit
strength or the
wearing quality of
the wood flooring.
a
Colour variation Slight variation Permitted
permitted
Medullary ray Permitted Permitted
Biodeterioration Not permitted Not permitted Not permitted,
except blue stain
and black holes
Non-visible parts
All features permitted without limit to size or quantity if these do not impair the strength or the wearing quality
of the wood flooring.
Sound sapwood is permitted from the back up to the upper part of the male profile of the interlocking system
without taking into account the limits set for the face.
a
Brown oak.

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oSIST prEN 13228:2010
prEN 13228:2009 (E)

5.2.2.2 Fraxinus excelsior (European ash) and Acer spp. (maple)
Rules for European ash and maple are given in Table 2.
Table 2 — Classification for Fraxinus excelsior (European ash) and Acer spp. (maple)
Face of the element
Class
Features
� ∆∆ �
∆∆
Sound sapwood
Not applicable Not applicable Not applicable
Knots Permitted if: Permitted if: Permitted if:
Sound and intergrown
b < 70 mm diameter ≤ 2 mm diameter ≤ 5 mm diameter ≤ 15 mm
b ≥ 70 mm diameter ≤ 3 mm diameter ≤ 10 mm diameter ≤ 30 mm

Unsound knots Not permitted
diameter ≤ 3 mm diameter ≤ 10 mm
Checks Not permitted Not permitted
Not permitted
Bark pockets Not permitted Not permitted
Not permitted
Lightning shake Not permitted Not permitted
Not permitted
Slope of grain
Permitted, no limit Permitted, no limit
Permitted, no limit
Colour variation Slight variation Permitted Permitted
permitted. Slight traces
of natural discoloration
(mineral lines)
permitted.
Stick marks Not permitted Permitted Permitted
Not permitted,
Biodeterioration Not permitted Not permitted
except blue stain
and black holes
Non-visible parts
All features permitted without limit to size or quantity if these do not impair the strength or the wearing quality
of the wood flooring.

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oSIST prEN 13228:2010
prEN 13228:2009 (E)

5.2.2.3 Fagus sylvatica (European beech)
Rules for European beech are given in Table 3.
Table 3 — Classification for Fagus sylvatica (European beech)
Face of the element
Class
Features
� �
∆∆∆∆
Sound sapwood Not applicable Not applicable Not applicable
Knots Permitted if: Permitted if: Permitted if:
Sound and intergrown
b < 70 mm diameter ≤ 2 mm diameter ≤ 5 mm diameter ≤ 15 mm
b ≥ 70 mm diameter ≤ 3 mm diameter ≤ 10 mm diameter ≤ 30 mm

Unsound knots Not permitted
diameter ≤ 3 mm diameter ≤ 10 mm
Checks Not permitted Not permitted Not permitted
Bark pockets Not permitted Not permitted Not permitted
Lightning shake
Not permitted Not permitted Not permitted
Slope of grain Permitted, no limit Permitted, no limit Permitted, no limit
Colour variation Slight variation Permitted Permitted
a
permitted . Slight
traces of natural
discoloration permitted.
Red heart Not permitted Permitted Permitted
Stick marks Not permitted Permitted Permitted
Medullary ray Permitted Permitted Permitted
Biodeterioration Not permitted Not permitted Not permitted,
except blue stain
and black holes
Non-visible parts
All features permitted without limit to size or quantity if these do not impair the strength or the wearing quality
of the wood flooring.
a
Permitted for steamed beech.

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oSIST prEN 13228:2010
prEN 13228:2009 (E)

5.2.2.4 Betula spp. (birch)
Rules for birch are given in Table 4.
Table 4 — Classification for Betula spp. (birch)
Face of the element
Class
Features
� ∆∆ �
∆∆
Sound sapwood Not applicable Not applicable Not applicable
Knots Permitted if: Permitted if: Permitted if:
Sound and intergrown
b < 70 mm diameter ≤ 2 mm diameter ≤ 5 mm diameter ≤ 15 mm
b ≥ 70 mm diameter ≤ 3 mm diameter ≤ 10 mm diameter ≤ 30 mm


Unsound knots
Not permitted
diameter ≤ 3 mm diameter ≤ 10 mm
Checks Not permitted Not permitted Not permitted
Bark pockets Not permitted Not permitted Not permitted
Lightning shake Not permitted Not permitted Not permitted
Slope of grain Permitted, no limit Permitted, no limit Permitted, no limit
Biodeterioration Not permitted Not permitted Not permitted,
except blue stain
and black holes
Stick marks Not permitted Permitted Permitted
Colour variation Slight variation Permitted Permitted
permitted. Slight traces
of natural discoloration
and mineral lines
permitted.
Non-visible parts
All features permitted without limit to size or quantity if these do not impair the strength or the wearing quality
of the wood flooring.

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oSIST prEN 13228:2010
prEN 13228:2009 (E)

5.2.2.5 Castanea sativa spp. (sweet chestnut)
Rules for sweet chestnut are given in Table 5.
Table 5 — Classification for Castanea sativa spp. (sweet chestnut)
Face of the element
Class
Features
� ∆∆ �
∆∆
Sound sapwood Not permitted Not permitted Slight traces
permitted
Knots Permitted if: Permitted if: Permitted if:
Sound and intergrown
b < 70 mm diameter ≤ 2 mm diameter ≤ 5 mm diameter ≤ 15 mm
b ≥ 70 mm diameter ≤ 3 mm diameter ≤ 10 mm diameter ≤ 30 mm

Unsound knots
diameter ≤ 1 mm diameter ≤ 3 mm diameter ≤ 10 mm
Yellow stain Not permitted 50 % permitted Permitted
Checks Not permitted Permitted when the Permitted when the
length ≤ width of the length ≤ 50 % of
element the length of the
element
Bark pockets Not permitted Not permitted Permitted
Lightning shake Not permitted Not permitted Permitted
Slope of grain Permitted, no limit Permitted, no limit Permitted, no limit
Colour variation Slight variation Permitted Permitted
permitted.
Biodeterioration Not permitted Not permitted Not permitted
Non-visible parts
All features permitted without limit to size or quantity if these do not impair the strength or the wearing quality
of the wood flooring.
Sound sapwood is permitted up to 50 % of the thickness.

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oSIST prEN 13228:2010
prEN 13228:2009 (E)

5.2.2.6 Other hardwoods
Rules for other hardwoods are given in Table 6.
Table 6 — Classification for other
...

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