EN 927-2:2006

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 the categories of 'end use' and 'exposure conditions' (defined in EN 927-1) in terms of the results of natural weathering performance testing carried out in accordance with EN 927-3. A mandatory water permeability test in accordance with EN 927-5 is also specified. Additional optional tests are identified which may be used by suppliers to provide voluntary additional information, to a standardized format, on aspects of performance relevant to specific building components such as windows.

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 Anwendungskategorien und Beanspruchungsbedingungen (definiert in
EN 927-1) anhand der Ergebnisse von Freibewitterungsprüfungen nach EN 927-3 festgelegt. Eine
verbindliche Prüfung der Wasserdurchlässigkeit nach EN 927-5 wird ebenfalls beschrieben. Zusätzliche
freiwillige Prüfungen werden angegeben, die von Herstellern angewendet werden können, um auf genormter
Grundlage wahlweise zusätzliche Informationen über Leistungsaspekte bei speziellen Bauteilen wie Fenstern
zu erhalten.

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

La présente partie de l'EN 927 établit des critères de performance s'appliquant aux systèmes de revêtement pour le bois en extérieur. Les exigences de performances sont définies selon les catégories " d'utilisation finale " et de " conditions d'exposition " (définies dans l'EN 927-1) en fonction des résultats de l'essai de vieillissement naturel selon l'EN 927-3. Il est également obligatoire d'effectuer un essai de détermination de la perméabilité à l'eau selon l'EN 927-5. Des essais complémentaires facultatifs sont identifiés ; les fournisseurs peuvent les réaliser, sous une forme normalisée, pour donner volontairement des informations complémentaires sur des aspects des performances spécifiques à certains éléments du bâtiment, comme par exemple les fenêtres.

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

General Information

• Status: Withdrawn
• Publication Date: 25-Apr-2006
• Withdrawal Date: 02-Sep-2014
• ICS: 87.040 - Paints and varnishes
• Technical Committee: CEN/TC 139 - Paints and varnishes
• Drafting Committee: CEN/TC 139/WG 2 - Coating systems for wood
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Completion Date: 03-Sep-2014
• Ref Project: SIST EN 927-2:2006 - Paints and varnishes - Coating materials and coating systems for exterior wood - Part 2: Performance specification

Relations

• Replaces: ENV 927-2:2000 - Paints and varnishes - Coating materials and coating systems for exterior wood - Part 2: Performance specification
• Effective Date: 22-Dec-2008
• Replaced By: EN 927-2:2014 - Paints and varnishes - Coating materials and coating systems for exterior wood - Part 2: Performance specification
• Effective Date: 10-Sep-2014

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Paints and varnishes - Coating materials and coating systems for exterior wood - Part 2: Performance specificationPeintures et vernis - Produits de peinture et systemes de revetement pour le bois en extérieur - Partie 2: Spécifications de performanceBeschichtungsstoffe - Beschichtungsstoffe und Beschichtungssysteme für Holz im Außenbereich - Teil 2: LeistungsanforderungenTa slovenski standard je istoveten z:EN 927-2:2006SIST EN 927-2:2006en87.04071.100.50ICS:SIST ENV 927-2:20011DGRPHãþDSLOVENSKI
STANDARDSIST EN 927-2:200601-julij-2006

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 927-2April 2006ICS 87.040Supersedes ENV 927-2:2000
English VersionPaints and varnishes - Coating materials and coating systemsfor exterior wood - Part 2: Performance specificationPeintures et vernis - Produits de peinture et systèmes derevêtement pour le bois en extérieur - Partie 2:Spécifications de performanceBeschichtungsstoffe - Beschichtungsstoffe undBeschichtungssysteme für Holz im Außenbereich - Teil 2:LeistungsanforderungenThis European Standard was approved by CEN on 9 March 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards 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 translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.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 STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2006 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 927-2:2006: E

Information and guidelines on interpretation.10 Bibliography.14

1 Scope This part of EN 927 specifies performance requirements for coating systems on exterior wood. Performance requirements are specified according to the categories of 'end use' and 'exposure conditions' (defined in EN 927-1) in terms of the results of natural weathering performance testing carried out in accordance with EN 927-3. A mandatory water permeability test in accordance with EN 927-5 is also specified. Additional optional tests are identified which may be used by suppliers to provide voluntary additional information, to a standardized format, on aspects of performance relevant to specific building components such as windows. 2 Normative references The following referenced documents are indispensable for the application of this European Standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 927-1:1996, Paints and varnishes — Coating materials and coating systems for exterior wood — Part 1: Classification and selection EN 927-3:2000, 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 prEN ISO 4618:2004, Paints and varnishes — Terms and definitions (ISO/DIS 4618:2004) 3 Terms and definitions For the purposes of this European Standard, the terms and definitions given in EN 927-1:1996 and
prEN ISO 4618:2004 apply. 4 Performance tests 4.1 Resistance to natural weathering 4.1.1 General The assessment of a coating material to this specification will require a natural weathering test to be carried out in accordance with EN 927-3, using a flat wood panel of pine (Pinus silvestris) with a planed surface. A manufacturer of a coating system that meets one or more of the performance profiles described in 4.1.2 can claim conformity to the specification, as described in Clause 6. If a coating system does not meet the performance criteria the manufacturer cannot claim full conformity but might provide information gained from one or more of the optional tests. The external durability of the coating system under test is assessed by a number of performance criteria. Guide values enable an assessment to be made of the suitability of the system for the proposed end-use. Comparative trials have shown that conformity to the criteria outlined below (Table 1) sets a performance standard capable of verification, but they do not in themselves constitute a certification procedure. Further guidance on the interpretation of the results is given in Annex A.

'Stable' 'Semi-stable' 'Non-stable' Blistering 0,3 0,7 1 Cracking 0,7 1,7 3 Flaking 0,3 0,7 1,3 Adhesion 1 1 1 Maximum sum value 7 12 19 Maximum difference to qualify as valid test 2 3 4 EN 927-5, water absorption value ≤175 g/m2 a ≤ 250 g/m2 a no limit a Non-mandatory values which will be revised/ratified in the light of ongoing work in CEN/TC 139/WG 2.
NOTE Test precision An estimate of the standard deviation of the weathering test method was made in a large comparative exercise carried out by members of the CEN Working Group. The findings of this exercise have been incorporated into the criteria matrix so that the underlying target values incorporate a tolerance to allow for variation in the performance of panel replicates. Attention has also been given to the expected distribution of results for a given test. Thus for example an arithmetic mean criterion of 1,3 for 'cracking' could be achieved as (1,1,2), (0,1,3) or (0,0,4). The ‘Maximum difference’ criteria considers the probability of such scores occurring, and rules out those which are well outside the expected distribution.

6 Expression of results and interpretation 6.1 Mandatory tests The ratings achieved in the weathering and permeability tests shall be reported and expressed according to the conventions listed in Table 3 or Table 4. Manufacturers claiming conformity with this European Standard for a specified coating system shall on request supply a data sheet containing the results in this format. Manufacturers may at their discretion expand the table format to include information from Table 5.

Table 3 — Mandatory tests for claiming full conformity Test description Reporting convention Appearance definition Build, hiding power and gloss in accordance with EN 927-1 End use category or categories meeting full performance criteria ‘Stable’ and/or ‘Semi-stable’ and/or ‘Non-stable’ Exposure conditions ‘Medium’ or ‘’severe in accordance with 4.1.3
NOTE Some coating systems might meet more than one of the performance profiles. It is at the manufacturer's discretion whether to claim conformity with more than one end-use category. Table 4 — Mandatory tests for claiming limited conformity Test description Reporting convention Appearance definition Build, hiding power and gloss in accordance with EN 927-1 End use category or categories meeting limited performance criteria ‘Stable’ and/or ‘Semi-stable’ and/or ‘Non-stable’ Substrate for which limited conformity is claimed Wood species, surface treatment, or machined finish Exposure conditions ‘Medium’ or ‘severe’ in accordance with 4.1.3
6.2 Optional tests Optional tests, which may be carried out at manufacturers’ discretion, shall be reported in the expanded format to give the information listed in Table 5. Guidelines on interpretation are given in Annex A. Table 5 — Optional tests for additional information Test description Reporting convention Blister box test Occurrence of blistering Blocking Degree of damage Stackability Degree of damage and mass loading Compatibility of glazing compounds Report any sticking, softening or discoloration Blue stain in service Depth of clea
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