Paints and varnishes - Coating materials and coating systems for exterior wood - Part 2: Performance specification

This part of EN 927 addresses performance criteria for coating systems on exterior wood. Performance requirements are specified according to three categories of end use (defined in EN 927 1) in terms of two mandatory tests namely natural weathering performance testing carried out in accordance with EN 927-3, and water permeability in accordance with EN 927-5. Additional optional tests (non-mandatory) are tabled which may be used by suppliers, or for specification purposes, to provide additional information, to a standardized format, on aspects of performance relevant to specific situations. The majority of test methods are drawn from EN 927 (all parts), but where relevant additional tests from other national and international sources are used.
Requirements for claiming conformity with FprEN 927-2 are defined and provide flexibility for different situations and can also provide a basis for certification.

Beschichtungsstoffe - Beschichtungsstoffe und Beschichtungssysteme für Holz im Außenbereich - Teil 2: Leistungsanforderungen

Dieser Teil von EN 927 legt Leistungskriterien für Beschichtungssysteme auf Holz im Außenbereich fest. Die Leistungskriterien werden nach den drei Anwendungskategorien (definiert in EN 927-1) festgelegt, anhand der Ergebnisse zweier Pflichtprüfungen, Freibewitterungsprüfung nach EN 927-3 sowie Wasserdurchlässigkeitsprüfung nach EN 927-5. Zusätzliche freiwillige Prüfungen werden angegeben, die von Herstellern oder für Spezifikationszwecke angewendet werden können, um auf genormter Grundlage zusätzliche Informationen über Leistungsaspekte bei speziellen Anwendungen zu erhalten. Der Großteil der Prüfverfahren werden der EN 927-Reihe entnommen, jedoch werden zusätzliche Prüfungen, sofern relevant, aus anderen nationalen und internationalen Quellen angewendet.
Anforderungen an den Anspruch auf Konformität mit FprEN 927-2 werden definiert und ermöglichen Flexibilität in Bezug auf unterschiedliche Anwendungen und können eine Zertifizierungsgrundlage liefern.

Peintures et vernis - Produits de peinture et systèmes de peinture pour le bois en extérieur - Partie 2: Spécifications de performance

La présente partie de l'EN 927 traite des critères de performance s'appliquant aux systèmes de peinture pour le bois en extérieur. Les exigences de performance sont spécifiées selon trois catégories d'usage final (définies dans l’EN 927-1) en termes de deux essais obligatoires, à savoir l'essai de vieillissement naturel réalisé conformément à l'EN 927-3 et l'essai de perméabilité à l'eau réalisé conformément à l'EN 927-5. Les essais supplémentaires facultatifs (non obligatoires) sont indiqués dans des tableaux et peuvent être utilisés par les fournisseurs, ou à des fins de spécification, pour fournir des informations supplémentaires, selon un format normalisé, sur des aspects des performances pertinents pour des situations spécifiques. La majorité des méthodes d'essai sont extraites de la série EN 927 mais, le cas échéant, des essais supplémentaires pertinents issus d'autres sources nationales et internationales sont utilisés.
Les exigences relatives à la déclaration de conformité à l’EN 927-2 sont définies, offrent une certaine souplesse pour différentes situations et peuvent également servir de base de certification.

Barve in laki - Premazi in premazni sistemi za zunanjo zaščito lesa - 2. del: Specifikacija lastnosti

Standard EN 927-2 obravnava merila lastnosti za premazne sisteme za zunanjo zaščito lesa. Zahteve glede lastnosti so določene v skladu s tremi kategorijami končne uporabe (opredeljeno v standardu EN 927-1) v zvezi z dvema obveznima preskusoma, tj. preskušanje lastnosti naravnega vremenska vplivanja v skladu s standardom EN 927-3 in propustnost vode v skladu s standardom EN 927-5. Predlagani so dodatni poljubni preskusi (neobvezni), ki jih lahko uporabijo dobavitelji, ali za namene specifikacije, da se zagotovijo dodatne informacije, v standardizirani obliki, in sicer v zvezi z vidiki lastnosti, ustreznih za posebne primere. Večina preskusnih metod izhaja iz standarda EN 927 (vsi deli), kjer pa je to primerno, so uporabljeni dodatni preskusi iz drugih nacionalnih in mednarodnih virov. Določene so zahteve za zagotavljanje skladnosti s standardom EN 927-2, ki zagotavljajo prilagodljivost za različne primere in jih je mogoče uporabiti kot podlago za certificiranje.

General Information

Status
Published
Publication Date
02-Sep-2014
Current Stage
9092 - Decision on results of review/2YR ENQ - revise - Review Enquiry
Due Date
03-Mar-2020
Completion Date
25-Sep-2020

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SLOVENSKI STANDARD
SIST EN 927-2:2014
01-november-2014
1DGRPHãþD
SIST EN 927-2:2006
%DUYHLQODNL3UHPD]LLQSUHPD]QLVLVWHPL]D]XQDQMR]DãþLWROHVDGHO
6SHFLILNDFLMDODVWQRVWL

Paints and varnishes - Coating materials and coating systems for exterior wood - Part 2:

Performance specification
Beschichtungsstoffe - Beschichtungsstoffe und Beschichtungssysteme für Holz im
Außenbereich - Teil 2: Leistungsanforderungen

Peintures et vernis - Produits de peinture et systèmes de peinture pour le bois en

extérieur - Partie 2 : Spécifications de performance
Ta slovenski standard je istoveten z: EN 927-2:2014
ICS:
71.100.50 .HPLNDOLMH]D]DãþLWROHVD Wood-protecting chemicals
87.040 Barve in laki Paints and varnishes
SIST EN 927-2:2014 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 927-2:2014
---------------------- Page: 2 ----------------------
SIST EN 927-2:2014
EUROPEAN STANDARD
EN 927-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2014
ICS 87.040 Supersedes EN 927-2:2006
English Version
Paints and varnishes - Coating materials and coating systems
for exterior wood - Part 2: Performance specification

Peintures et vernis - Produits de peinture et systèmes de Beschichtungsstoffe - Beschichtungsstoffe und

peinture pour le bois en extérieur - Partie 2: Spécifications Beschichtungssysteme für Holz im Außenbereich - Teil 2:

de performance Leistungsanforderungen
This European Standard was approved by CEN on 25 July 2014.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United

Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2014 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 927-2:2014 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 927-2:2014
EN 927-2:2014 (E)
Contents Page

Foreword ..............................................................................................................................................................3

Introduction .........................................................................................................................................................4

1 Scope ......................................................................................................................................................5

2 Normative references ............................................................................................................................5

3 Terms and definitions ...........................................................................................................................6

4 Performance tests – Testing profiles...................................................................................................6

5 Test overview .........................................................................................................................................7

5.1 Natural weathering.................................................................................................................................7

5.1.1 General ....................................................................................................................................................7

5.1.2 Performance criteria ..............................................................................................................................7

5.1.3 Exposure conditions .............................................................................................................................8

5.1.4 Natural weathering – Alternative substrates ......................................................................................8

5.1.5 Natural weathering – Alternative test piece ........................................................................................8

5.2 Existing test methods ...........................................................................................................................8

5.2.1 Water permeability .................................................................................................................................8

5.2.2 Artificial weathering ..............................................................................................................................9

5.2.3 Knot staining ..........................................................................................................................................9

5.2.4 Tannin staining ......................................................................................................................................9

5.2.5 Microfoam ...............................................................................................................................................9

5.2.6 Film extensibility ....................................................................................................................................9

5.2.7 Blocking ..................................................................................................................................................9

5.2.8 Impact test ..............................................................................................................................................9

5.2.9 Fungal and algal growth .................................................................................................................... 10

5.3 Test methods in preparation ............................................................................................................. 10

5.3.1 Wet adhesion (parallel cross-cut test) .............................................................................................. 10

5.3.2 Wet adhesion (pull-off test) ............................................................................................................... 10

5.3.3 UV transmittance ................................................................................................................................ 10

5.3.4 End grain sealing ................................................................................................................................ 10

6 Summary of test methods and reporting convention ..................................................................... 10

7 Expression of results and claiming conformity – Scope and reporting convention ................... 11

Bibliography ..................................................................................................................................................... 13

---------------------- Page: 4 ----------------------
SIST EN 927-2:2014
EN 927-2:2014 (E)
Foreword

This document (EN 927-2:2014) has been prepared by Technical Committee CEN/TC 139 “Paints and

varnishes”, the secretariat of which is held by DIN.

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 March 2015, and conflicting national standards shall be withdrawn at

the latest by March 2015.

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 927-2:2006.

The following significant technical changes have been made with respect to EN 927-2:2006:

a) test profiles for the three main end-use categories (as defined in EN 927-1) have been updated to include

additional test methods;

b) Annex A has been deleted; further information on test methods is found in Clause 5, or the referenced

test methods themselves.

EN 927 consists of the following parts under the general title: Paints and varnishes — Coating materials and

coating systems for exterior wood
— Part 1: Classification and selection;
— Part 2: Performance specification;
— Part 3: Natural weathering test;
— Part 5: Assessment of the liquid water permeability;

— Part 6: Exposure of wood coatings to artificial weathering using fluorescent UV lamps and water.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece,

Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,

Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

---------------------- Page: 5 ----------------------
SIST EN 927-2:2014
EN 927-2:2014 (E)
Introduction

This European Standard is one of a number of parts of EN 927. EN 927-1 addresses the issue of terminology

for the wide variety of exterior coatings for wood that are now available. EN 927-1 also provides a framework

for communicating information on the suitability of a coating for particular specific end-use categories.

Improved communication is beneficial in the removal of technical barriers to trade. However, there remains the

problem of comparing products tested, or likely to be exposed, in different climatic regions, and the relevance

of tests for different categories of end-use. EN 927-2 addresses these issues and sets a limited number of

mandatory performance criteria combined with optional tests that can provide additional information to a

standardized format.
---------------------- Page: 6 ----------------------
SIST EN 927-2:2014
EN 927-2:2014 (E)
1 Scope

This part of EN 927 addresses performance criteria for coating systems on exterior wood. Performance

requirements are specified according to three categories of end use (defined in EN 927-1) in terms of two

mandatory tests namely natural weathering performance testing carried out in accordance with EN 927-3, and

water permeability in accordance with EN 927-5. Additional optional tests (non-mandatory) are tabled which

may be used by suppliers, or for specification purposes, to provide additional information, to a standardized

format, on aspects of performance relevant to specific situations. The majority of test methods are drawn from

EN 927 (all parts), but where relevant additional tests from other national and international sources are used.

Requirements for claiming conformity with EN 927-2 are defined and provide flexibility for different situations

and can also provide a basis for certification.
2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. For dated references, only the edition cited applies. For undated references,

the latest edition of the referenced document (including any amendments) applies.

EN 927-1:2013, Paints and varnishes - Coating materials and coating systems for exterior wood - Part 1:

Classification and selection

EN 927-3:2012, Paints and varnishes - Coating materials and coating systems for exterior wood - Part 3:

Natural weathering test

EN 927-5, Paints and varnishes - Coating materials and coating systems for exterior wood - Part 5:

Assessment of the liquid water permeability

EN 927-6, Paints and varnishes - Coating materials and coating systems for exterior wood - Part 6: Exposure

of wood coatings to artificial weathering using fluorescent UV lamps and water

EN 16492, Paints and varnishes - Evaluation of the surface disfigurement caused by fungi and algae on

coatings

CEN/TS 16358, Paints and varnishes - Coating materials and coating systems for exterior wood - Assessment

of air inclusions/microfoam in coating films

CEN/TS 16359, Paints and varnishes - Coating materials and coating systems for exterior wood - Assessment

of knot staining resistance of wood coatings

CEN/TS 16360, Paints and varnishes - Coating materials and coating systems for exterior wood - Assessment

of film extensibility by indentation of a coating on a wooden substrate

CEN/TS 16498, Paints and varnishes - Coating materials and coating systems for exterior wood - Assessment

of tannin staining

CEN/TS 16499, Paints and varnishes - Coating materials and coating systems for exterior wood - Resistance

to blocking of paints and varnishes on wood

CEN/TS 16700, Paints and varnishes - Coating materials and coating systems for exterior wood - Assessment

of resistance to impact of a coating on a wooden substrate
EN ISO 4618:2006, Paints and varnishes - Terms and definitions (ISO 4618:2006)
---------------------- Page: 7 ----------------------
SIST EN 927-2:2014
EN 927-2:2014 (E)

EN ISO 4628-1, Paints and varnishes - Evaluation of degradation of coatings - Designation of quantity and

size of defects, and of intensity of uniform changes in appearance - Part 1: General introduction and

designation system (ISO 4628-1)

EN ISO 7783, Paints and varnishes - Determination of water-vapour transmission properties - Cup method

(ISO 7783)
3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN 927-1:2013 and EN ISO 4618:2006

apply.
4 Performance tests – Testing profiles

EN 927-1 classifies exterior wood coatings according to appearance (75 possibilities) and three broad end-

use categories. Assessment of performance is carried out with reference to the end-use categories, which are

grouped according to the extent to which wood movement shall be controlled. Performance will be strongly

influenced by appearance (e.g. transparent versus opaque), by substrate (e.g. wood species) and by climatic

and exposure conditions. It is open to suppliers or end-users to agree a combination of tests (see Table 1 and

Table 2) tha
...

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