EN 1279-2:2018

Glass in building - Insulating glass units - Part 2: Long term test method and requirements for moisture penetration

This document describes the test method for the determination of moisture penetration index and specifies the requirements for limit values for insulating glass units made
a)   in accordance with EN 1279 1:2018 and manufactured to EN 1279 6:2018; or
b)   for the purpose to demonstrate that components (e.g. edge seals or spacers) will allow the insulating glass unit to conform to the requirements given in EN 1279 1:2018, Clause 6.

Glas im Bauwesen - Mehrscheiben-Isolierglas - Teil 2: Langzeitprüfverfahren und Anforderungen bezüglich Feuchtigkeitsaufnahme

Dieses Dokument beschreibt das Prüfverfahren für die Bestimmung des Feuchtigkeitsaufnahmefaktors und legt die Anforderungen an die Grenzwerte für Mehrscheiben-Isoliergläser fest, die
a)   in Übereinstimmung mit EN 1279 1:2018 und nach EN 1279 6:2018 gefertigt wurden oder
b)   gefertigt wurden, um zu zeigen, dass die Komponenten (z. B. Randverbund oder Abstandhalter) es zulassen, dass das Mehrscheiben-Isolierglas mit den Anforderungen in EN 1279 1:2018, Abschnitt 6, übereinstimmt.

Verre dans la construction - Vitrage isolant - Partie 2 : Méthode d'essai de longue durée et exigences en matière de pénétration d'humidité

Le présent document décrit la méthode d'essai pour la détermination de l'indice de pénétration d'humidité et spécifie les exigences relatives aux valeurs limites pour les vitrages isolants produits
a)   conformément à l'EN 1279-1:2018 et à l'EN 1279-6:2018 ; ou
b)   dans le but de démontrer que des composants (par exemple, joints périphériques ou espaceurs) permettront au vitrage isolant d'être conforme aux exigences de l'EN 1279-1:2018, Article 6.

Steklo v gradbeništvu - Izolacijsko steklo - 2. del: Dolgoročna preskusna metoda ter zahteve za penetracijo vlage

Ta evropski standard opisuje preskusno metodo za ugotavljanje indeksa penetracije vlage in določa zahteve za mejne vrednosti za izolacijsko steklo, izdelano
a) v skladu s standardom prEN 1279-1:2015 in prEN 1279-6:2015 ali
b) za dokazovanje, da komponente (npr. robna tesnila ali distančniki) steklu omogočajo skladnost z zahtevami, opredeljenimi v točki 6 standarda prEN 1279-1:2015.

General Information

• Status: Published
• Publication Date: 24-Jul-2018
• Withdrawal Date: 30-Jan-2019
• ICS: 81.040.20 - Glass in building
• ICS: 91.100.99 - Other construction materials
• Technical Committee: CEN/TC 129 - Glass in building
• Drafting Committee: CEN/TC 129/WG 4 - Insulating glass units
• Current Stage: 9092 - Decision on results of review/2YR ENQ - revise - Review Enquiry
• Start Date: 13-Mar-2025
• Completion Date: 14-Apr-2025
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Directive: 88/609/EEC - Limitation of emissions of certain pollutants into the air from large combustion plants
• Mandate: M/135 - Mandate to CEN/CENELEC concerning the execution of standardization work for harmonized standards on flat glass, profiled glass and glass block products
• Mandate: M/135_AM1 - First amendment to mandate M/135 - Mandate to CEN/CENELEC concerning the execution of standardisation work for harmonised standards on glass
• Ref Project: SIST EN 1279-2:2018 - Glass in building - Insulating glass units - Part 2: Long term test method and requirements for moisture penetration

Relations

• Replaces: EN 1279-2:2002 - Glass in building - Insulating glass units - Part 2: Long term test method and requirements for moisture penetration
• Effective Date: 08-Jun-2022

Overview

EN 1279-2:2018 - "Glass in building - Insulating glass units - Part 2" defines a long‑term test method and pass/fail requirements for moisture penetration into insulating glass units (IGUs). The standard specifies how to age IGU specimens in a controlled climate, measure desiccant moisture uptake, and calculate the moisture penetration index (I and Iav). It applies to IGUs made in accordance with EN 1279‑1:2018 and manufactured under EN 1279‑6:2018, and to component-level demonstrations (edge seals, spacers) intended to show conformity with EN 1279‑1, Clause 6.

Key topics and technical requirements

• Test objective: Determine moisture penetration into IGUs after accelerated climatic ageing.
• Specimens: 15 test units representative of the system; typical size (502 ± 2) × (352 ± 2) mm, nominal glass thickness 4 mm, cavity width 12 mm (or closest available).
• Climate procedure: Two-step ageing - a cyclic high/low temperature and humidity phase (including periods at ≈+53 °C with >95% RH) followed by a prolonged constant exposure at ≈+58 °C and >95% RH for seven weeks. Condensation on specimens is permitted.
• Measurements: Initial (Ti), final (Tf) and, where required, standard (Tc) moisture content of desiccant are determined. Methods allowed include 540 °C drying, Karl Fischer titration, gravimetric and dew‑point methods (for units without desiccant). Sampling methods for desiccant (bulk or from flexible spacers) are specified.
• Pass criteria: Average moisture penetration index Iav ≤ 0.20 (20%) for five aged specimens; individual specimen I ≤ 0.25 (25%).
• Reporting & precision: Test report content and inter‑laboratory precision data are defined; Iav is method‑independent but moisture content designations depend on the measurement method.

Applications and users

This part of EN 1279 is directly useful for:

• IGU manufacturers - factory production control, product development and validation of seal systems.
• Component suppliers - qualification of spacers, edge seals and desiccants to demonstrate compliance.
• Independent test laboratories - performing long‑term moisture penetration testing and certification.
• Specifiers, architects and façade engineers - assessing durability risks related to moisture ingress and lifetime performance of sealed glazing units.
• Regulatory bodies and certification schemes - establishing compliance with building product standards.

Related standards

• EN 1279‑1:2018 - Generalities, system description and visual quality.
• EN 1279‑4:2018 - Test methods for physical attributes of edge‑seal components and inserts.
• EN 1279‑6:2018 - Factory production control and periodic tests.

Keywords: EN 1279-2:2018, insulating glass units, moisture penetration, moisture penetration index, IGU testing, desiccant, edge seals, spacers, long term test method.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Glas im Bauwesen - Mehrscheiben-Isolierglas - Teil 2: Langzeitprüfverfahren und Anforderungen bezüglich FeuchtigkeitsaufnahmeVerre dans la construction - Vitrage isolant - Partie 2: Méthode d'essai de longue durée et exigences en matière de pénétration d'humiditéGlass in building - Insulating glass units - Part 2: Long term test method and requirements for moisture penetration81.040.20Steklo v gradbeništvuGlass in buildingICS:Ta slovenski standard je istoveten z:EN 1279-2:2018SIST EN 1279-2:2018en,fr,de01-oktober-2018SIST EN 1279-2:2018SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 1279-2
July
t r s z ICS
z sä r v rä t r Supersedes EN
s t y {æ tã t r r tEnglish Version
Glass in building æ Insulating glass units æ Part
tã Long term test method and requirements for moisture penetration Verre dans la construction æ Vitrage isolant æ Partie
t ã Méthode d 5essai de longue durée et exigences en matière de pénétration d 5humidité
Glas im Bauwesen æ MehrscheibenæIsolierglas æ Teil
tã Langzeitprüfverfahren und Anforderungen bezüglich Feuchtigkeitsaufnahme This European Standard was approved by CEN on
s x March
t r s zä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Rue de la Science 23,
B-1040 Brussels
t r s z CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s t y {æ tã t r s z ESIST EN 1279-2:2018

Moisture content in insulating glass units without desiccant . 16
± 2,0) °C; — During the slopes:
= (s ± 4,0) °C/h (for other specimens than the centred one); — During constant temperature: c = (58 ± 1) °C; c) The time to move the specimens from one cabinet to another was increased; d) The minimum storage duration before testing was reduced to 3 days; e) Test report was revised adding a full description of the test specimens; f) Annex A: Dew point was moved to part 6; g) Annex B: Measurement of the moisture content was moved to main part (sampling) and part 4 Annex E (measuring with change of temperature from 950 °C to 540 °C); h) Annex C: Karl Fisher was moved to main part (sampling) and part 4 Annex F (measuring); i) Annex D: Measurement of Tc was moved to part 4 Annex E (desiccant in bulk) or F (Karl Fisher); j) Moisture content in insulating glass units without desiccant was moved to Annex A. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. This European Standard “Glass in Building - Insulating glass units” consists of the following Parts: — Part 1: Generalities, system description, rules for substitution, tolerances and visual quality; — Part 2: Long term test method and requirements for moisture penetration; SIST EN 1279-2:2018

IEC Electropedia: available at http://www.electropedia.org/
ISO Online browsing platform: available at http://www.iso.org/obp 4 Symbols and abbreviations Symbol Characteristic Unit AWAC Available water adsorption capacity % by weight I Moisture penetration index of the IGU fraction or percentage Iav Average value of the moisture penetration indices I within tested set of IGUs fraction or percentage Tc Standard moisture adsorption capacity of desiccant % by weight Tc,av Average standard moisture adsorption capacity of desiccant Tc % by weight Tf Final moisture content of desiccant after ageing according to standardized ageing conditions % by weight Ti Initial moisture content of desiccant before ageing % by weight Ti,av Average initial moisture content of desiccant Ti obtained over four measurements % by weight SIST EN 1279-2:2018

Temperature of the external face of test specimens in test cabinet °C c Temperature of the external face of the central test specimen in test cabinet during constant temperature phase °C h High temperature of the external face of the central test specimen in the test cabinet during the high humidity/temperature cycling phase °C l Low temperature of the external face of the central test specimen in the test cabinet during the low humidity/temperature cycling phase °C s Temperature of the external face of the central test specimen in the test cabinet as the cycle moves between high temperature and low temperature and vice versa °C 5 Requirements Average moisture penetration index (Iav) and moisture penetration index (I) shall be determined in accordance with Clause 6. The average moisture penetration index (Iav) of five test specimens shall not exceed 0,20 (or 20 %). The moisture penetration index of any test specimen shall not exceed 0,25 (or 25 %). 6 Method of long-term test 6.1 Principle Insulating glass unit (IGU) specimens are exposed to a climate test. The initial and final moisture content of the desiccant are determined. I values for each unit tested and Iav value are calculated for each unit tested. 6.2 Number, description and selection of test specimens 15 test specimens which shall be representative of the system description (see EN 1279-1:2018, Annex A), and shall consist of two panes of 4 mm glass in accordance with EN 1279-1:2018, 5.2. If 4 mm glass is not available, the thickness as near as possible to 4 mm shall be used. The length shall be (502 ± 2) mm and the width shall be (352 ± 2) mm. The cavity width shall be 12 mm, or if not manufactured, the cavity width shall be as near as possible to 12 mm. Specimens of triple glazed units may also be tested. Length, width and cavity width should fulfil the above mentioned requirements. The I-value of the individual cavities may be different. The requirement given in Clause 5 applies to both individual cavities. After production, the test specimens shall be stored for fourteen days and additionally conditioned for a minimum of three days at standard laboratory conditions. Number the specimens by random selection. Select the specimens as indicated in Table 1. SIST EN 1279-2:2018

Specimen number Designate specimens for: 1, 2, 3 and 4 Measurement of initial moisture content of desiccant (Ti) 5, 6, 7, 8 and 9 Climate testing and measurement of final moisture content of desiccant (Tf) 10, 11, 12 and 13 If used in case of breakage, spare specimens shall be aged in accordance with the full climate test for measurement of final moisture content of desiccant (Tf) 14 and 15 Disregarded or measurement of standard moisture adsorption capacity of desiccant (Tc) as required The average moisture penetration index Iav shall be the average of five specimens . 6.3 Climate conditions in cabinet The climate test procedure consists of two subsequent steps.
Key 1 cycling 2 moving specimen
...