Glass in Building - Insulating glass units - Part 1: Generalities, system description, rules for substitution, tolerances and visual quality

This document (all parts) covers the requirements for insulating glass units. The main intended uses of the insulating glass units are installations in windows, doors, curtain walling, bonded glazing for doors, windows and curtain walling, roofs and partitions.
The achievement of the requirements of this standard indicates that insulating glass units fulfil the needs for intended use and ensures by means of the evaluation of conformity to this standard that, visual, energetic, acoustic, safety parameters do not change significantly over time.
In cases where there is no protection against direct ultraviolet radiation or permanent shear load on the edge seal, as in bonded glazing for doors, windows and curtain walling systems, it is essential to follow additional European Technical Specifications (see EN 15434, EN 13022 1 and prEN 16759).
Insulating glass units that are intended for artistic purposes (e.g. lead glass or fused glass) are excluded from the scope of this standard.
Vacuum insulating glass is not covered by this standard (see ISO DIS 19916 1).
Glass/plastics composites are under the scope as long as the surface of contact with sealants is a glass component.
NOTE   For glass products with electrical wiring or connections for, e.g. alarm or heating purposes, other directives, e.g. Low Voltage Directive, may apply.
This European Standard gives definitions for insulating glass units and covers the rules for the system description, the optical and visual quality and the dimensional tolerances thereof and describes the substitution rules based on an existing system description.

Glas im Bauwesen - Mehrscheiben-Isolierglas - Teil 1: Allgemeines, Systembeschreibung, Austauschregeln, Toleranzen und visuelle Qualität

Dieses Dokument (alle Teile) behandelt die Anforderungen an Mehrscheiben-Isoliergläser. Die Haupt-verwendungsgebiete für Mehrscheiben-Isoliergläser sind der Einbau in Fenster, Türen, Vorhangfassaden, geklebte Verglasungen für Türen, Fenster, vorgehängte Fassaden, Dächer und Trennwände.
Das Erfüllen der Anforderungen dieser Norm bedeutet, dass Mehrscheiben-Isoliergläser den Bedarf für den bestimmungsgemäßen Gebrauch erfüllen und stellt mit Hilfe der Bewertung der Konformität mit dieser Norm sicher, dass visuelle, energetische, akustische und sicherheitsbezogene Parameter sich mit der Zeit nicht signifikant ändern.
In Fällen, in denen kein Schutz vor direkter UV-Bestrahlung gegeben ist oder bei dauernden, auf den Rand-verbund wirkenden Scherlasten wie in geklebten Verglasungen für Türen, Fenster und vorgehängte Fassaden sind zusätzliche Europäische Technische Spezifikationen zu befolgen (siehe EN 15434, EN 13022-1 und prEN 16759).
Mehrscheiben-Isoliergläser für künstlerische Zwecke (z. B. Bleiglas oder verschmolzenes Glas) sind nicht Gegenstand dieser Norm.
Vakuumisolierglas ist nicht Gegenstand dieser Norm (siehe ISO/DIS 19916-1).
Glas/Kunststoff-Verbunde gehören zum Anwendungsbereich, solange die Oberfläche, die mit dem Dichtstoff in Kontakt steht, aus Glas ist.
ANMERKUNG Für Glaserzeugnisse mit elektrischer Verdrahtung oder elektrischen Anschlüssen, für z. B. Alarm- oder Heizfunktionen, können weitere Richtlinien, z. B. die Niederspannungsrichtlinie, gelten.
Diese Europäische Norm umfasst Definitionen für Mehrscheiben-Isoliergläser und die Regeln für die System-beschreibung, die optische und visuelle Qualität sowie die Maßtoleranzen und beschreibt die Regeln für den Austausch innerhalb einer bestehenden Systembeschreibung.

Verre dans la construction - Vitrage isolant - Partie 1 : Généralités, description du système, règles de substitution, tolérances et qualité visuelle

Le présent document (toutes les parties) couvre les exigences relatives aux vitrages isolants. Les usages prévus des vitrages isolants sont principalement les installations dans des fenêtres, des portes, des façades-rideaux, des vitrages extérieurs collés, des toitures et des cloisons.
Lorsque les exigences à cette norme sont satisfaites, les vitrages isolants répondent aux besoins pour l'usage prévu et il est assuré, du fait de l'évaluation de la conformité à cette norme, que les paramètres visuels, énergétiques, acoustiques et de sécurité ne varient pas de façon significative dans le temps.
En l'absence de protection contre les rayonnements ultraviolets directs en cas de cisaillement permanent sur les bords, comme dans le cas des vitrages extérieurs collés, il est nécessaire de se conformer à des Spécifications Techniques Européennes supplémentaires (voir EN 15434 et EN 13022-1 et prEN 16759).
Les vitrages isolants, destinés à une utilisation artistique (par exemple, verre au plomb ou verre fondu) ne relèvent pas du domaine d'application de la présente norme.
Les vitrages isolants à lame de vide ne sont pas couverts par la présente norme (voir ISO DIS 19916-1).
Les composites verre/plastique relèvent du domaine d'application de la présente norme pour autant que la surface de contact avec les mastics de scellement soit un composant verrier.
NOTE   Pour les produits verriers équipés d'un câblage ou de branchements électriques pour les besoins d'alarme ou de chauffage par exemple, d'autres directives, comme par exemple la Directive « Basse tension », peuvent s'appliquer.
La présente Norme européenne donne des définitions pour les vitrages isolants et couvre les règles pour la description du système, la qualité optique et visuelle ainsi que les tolérances dimensionnelles et décrit les règles de substitution, dans une description de système existant.

Steklo v gradbeništvu - Izolacijsko steklo - 1. del: Splošno, opis sistema, pravila za zamenjavo, tolerance in vizualna kakovost

Ta evropski standard (vsi deli) zajema zahteve za izolacijsko steklo. Glavne predvidene uporabe izolacijskega stekla so vgradnja v okna, vrata, obešene fasade, strukturno zasteklitev, strehe in predelne stene.
Izpolnitev zahtev tega standarda pomeni, da izolacijsko steklo izpolnjuje potrebe predvidene uporabe in s pomočjo ocene skladnosti s tem standardom zagotovi, da se vizualni, energetski, zvočni in varnostni parametri s časom bistveno ne spremenijo.
Kadar ni nobene zaščite pred neposrednim ultravijoličnim sevanjem ali trajnimi strižnimi obremenitvami robov, kot pri sistemih strukturnih zasteklitev, je nujno upoštevati dodatne evropske tehnične specifikacije (glejte EN 15434 in EN 13022-1).
Izolacijsko steklo za umetniške namene (npr. svinčevo steklo ali taljeno steklo) ne spada na področje uporabe tega standarda. Stekleni/polimerni kompoziti spadajo na področje uporabe tega standarda, če je površina stika s tesnili steklena komponenta.
OPOMBA: za steklene proizvode z električno napeljavo ali priključki za npr. alarmne ali grelne namene se lahko uporabljajo druge direktive, npr. direktiva o nizki napetosti.
Ta evropski standard določa definicije za izolacijsko steklo in zajema pravila za opis sistema, optično in vizualno kakovost ter dimenzijska odstopanja in opisuje pravila o zamenjavi znotraj obstoječega opisa sistema. Podaja tudi informativna navodila za vgradnjo izolacijskega stekla v okna in fasade.

General Information

Status
Published
Publication Date
24-Jul-2018
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
25-Jul-2018
Completion Date
25-Jul-2018

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Steklo v gradbeništvu - Izolacijsko steklo - 1. del: Splošno, opis sistema, pravila za zamenjavo, tolerance in vizualna kakovostGlas im Bauwesen - Mehrscheiben-Isolierglas - Teil 1: Allgemeines, Systembeschreibung, Austauschregeln, Toleranzen und visuelle QualitätVerre dans la construction - Vitrage isolant - Partie 1: Généralités, description du système, règles de substitution, tolérances et qualité visuelleGlass in Building - Insulating glass units - Part 1: Generalities, system description, rules for substitution, tolerances and visual quality81.040.20Steklo v gradbeništvuGlass in buildingICS:Ta slovenski standard je istoveten z:EN 1279-1:2018SIST EN 1279-1:2018en,fr,de01-oktober-2018SIST EN 1279-1:2018SLOVENSKI

STANDARDSIST EN 1279-1:2004/AC:2006SIST EN 1279-1:20041DGRPHãþD
SIST EN 1279-1:2018
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 1279-1
July
t r s z ICS
z sä r v rä t r Supersedes EN
s t y {æ sã t r r vEnglish Version
Glass in Building æ Insulating glass units æ Part

sã Generalitiesá system descriptioná rules for substitutioná tolerances and visual quality Verre dans la construction æ Vitrage isolant æ Partie

s ã Généralitésá description du systèmeá règles de substitutioná tolérances et qualité visuelle

Glas im Bauwesen æ MehrscheibenæIsolierglas æ Teil

sã Allgemeinesá Systembeschreibungá Austauschregelná Toleranzen und visuelle Qualität This European Standard was approved by CEN on

{ 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 sã t r s z ESIST EN 1279-1:2018

EN 1279-1:2018 (E) 2 Contents Page European foreword ....................................................................................................................................................... 4 1 Scope .................................................................................................................................................................... 6 2 Normative references .................................................................................................................................... 6 3 Terms and definitions ................................................................................................................................... 7 4 Symbols and abbreviations for edge seal ............................................................................................ 14 5 Requirements ................................................................................................................................................ 15 5.1 General ............................................................................................................................................................. 15 5.2 Glass panes/components .......................................................................................................................... 16 5.2.1 General ............................................................................................................................................................. 16 5.2.2 Basic glasses ................................................................................................................................................... 16 5.2.3 Special basic glasses .................................................................................................................................... 16 5.2.4 Strengthened glasses .................................................................................................................................. 16 5.2.5 Thermally toughened safety glasses ..................................................................................................... 17 5.2.6 Laminated glasses ........................................................................................................................................ 17 5.2.7 Coated glasses................................................................................................................................................ 17 5.2.8 Surface worked glass .................................................................................................................................. 17 5.2.9 Curved glass ................................................................................................................................................... 17 5.3 Cavity fillings ................................................................................................................................................. 18 5.4 Cavity inserts ................................................................................................................................................. 18 5.5 Shapes............................................................................................................................................................... 18 6 Requirements ................................................................................................................................................ 18 6.1 Durability of insulating glass units ........................................................................................................ 18 Annex A (normative)

System description of insulating glass units ........................................................ 22 Annex B (normative)

Examples of insulating glass unit systems ............................................................ 23 B.1 General ............................................................................................................................................................. 23 B.2 Organic sealed insulating glass units with rigid hollow spacer .................................................. 23 B.3 Insulating glass units sealed by hot applied flexible spacer incorporating desiccant ........ 23 B.4 Insulating glass units with prefabricated flexible spacer ............................................................. 24 B.5 Organic sealed insulating glass units with U-channel shaped spacer incorporating desiccant matrix ........................................................................................................................................... 25 B.6 Air filled insulating glass units sealed by a metal strip between the glass panes ................ 27 Annex C (informative)

Compatibility of components within an insulating glass unit system ...... 28 C.1 Compatibility ................................................................................................................................................. 28 C.2 Diffusion and equilibrium ......................................................................................................................... 28 C.3 Contact ............................................................................................................................................................. 28 C.4 Interaction ...................................................................................................................................................... 28 C.5 Factors affecting compatibility ............................................................................................................... 28 SIST EN 1279-1:2018

EN 1279-1:2018 (E) 3 Annex D (normative)

Rules to substitute materials and components, possible changes within components and addition in the system description ........................................................ 30 D.1 General comments........................................................................................................................................ 30 D.2 Tables of possibilities to substitute materials and components, and of possible changes within components ..................................................................................................................... 30 D.3 Addition of components ............................................................................................................................. 35 D.3.1 Addition of cavity inserts without change of the permeation barrier design ........................ 35 D.3.2 Addition of cavity inserts with change of the permeation barrier design ............................... 35 Annex E (informative)

Edge seal strength comparison in case of substituting outer sealant ....... 36 Annex F (normative)

Visual quality of insulating glass units .................................................................... 37 F.1 General ............................................................................................................................................................. 37 F.2 Observation conditions .............................................................................................................................. 37 F.3 Insulating glass unit made of two panes of monolithic glass ........................................................ 38 F.3.1 Spot faults ........................................................................................................................................................ 38 F.3.2 Residues ........................................................................................................................................................... 39 F.3.3 Linear / extended fault ............................................................................................................................... 39 F.4 Insulating glass units other than made of two monolithic glass panes..................................... 39 F.5 Insulating glass unit containing a heat treated glass ....................................................................... 40 F.6 Edge defects .................................................................................................................................................... 40 F.7 Tolerance on spacer straightness ........................................................................................................... 40 F.8 Curved insulating glass units .................................................................................................................... 41 Annex G (informative)

Other visual aspects of insulating glass units .................................................... 42 G.1 General ............................................................................................................................................................. 42 G.2 Inherent colour .............................................................................................................................................. 42 G.3 Difference in insulating glass unit colour ............................................................................................ 42 G.4 Interference effect ........................................................................................................................................ 42 G.5 Specific effect due to barometric conditions ...................................................................................... 42 G.6 Multiple reflections ...................................................................................................................................... 42 G.7 Anisotropy (iridescence) ........................................................................................................................... 43 G.8 Condensation on the external surface of the insulating glass unit ............................................. 43 G.9 Wetting of glass surfaces ............................................................................................................................ 43 Bibliography ................................................................................................................................................................. 44

SIST EN 1279-1:2018

EN 1279-1:2018 (E) 4 European foreword This document (EN 1279-1:2018) has been prepared by Technical Committee CEN/TC 129 “glass in building”, the secretariat of which is held by NBN. 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 January 2019 and conflicting national standards shall be withdrawn at the latest by January 2019. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 1279-1:2004. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. The main changes in comparison with the previous edition include: a) Example of system descriptions was added; b) Annex B: examples of IGU systems were transferred from part 6; c) Annex C compatibility of components was added; d) Annex D: rules to substitute materials and components were revised and combined in this part; e) Annex F: visual appearance requirements were added. EN 1279, 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; — Part 3: Long term test method and requirements for gas leakage rate and for gas concentration tolerances; — Part 4: Methods of test for the physical attributes of edge seal components and inserts; — Part 5: Product standard; — Part 6: Factory production control and periodic tests. This standard is written on the assumption of a 25 year period of use for IGUs. No warranty can be derived thereof for the variety of different IGU designs, manufacturing procedures and particularly with regard to glazing situations. To ensure the full suitability and durability of new IGU designs or special product variants additional tests of components and/or IGUs may be required. SIST EN 1279-1:2018

EN 1279-1:2018 (E) 5 This means, that the described test procedures and all requirements of this standard, including factory production control, were worked out with the understanding that all values for characteristic’s performances can be kept under relevant glazing situations in window and facades for this period without significant change. 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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 1279-1:2018

EN 1279-1:2018 (E) 6 1 Scope This document (all parts) covers the requirements for insulating glass units. The main intended uses of the insulating glass units are installations in windows, doors, curtain walling, bonded glazing for doors, windows and curtain walling, roofs and partitions. The achievement of the requirements of this standard indicates that insulating glass units fulfil the needs for intended use and ensures by means of the evaluation of conformity to this standard that, visual, energetic, acoustic, safety parameters do not change significantly over time. In cases where there is no protection against direct ultraviolet radiation or permanent shear load on the edge seal, as in bonded glazing for doors, windows and curtain walling systems, it is essential to follow additional European Technical Specifications (see EN 15434, EN 13022-1 and prEN 16759). Insulating glass units that are intended for artistic purposes (e.g. lead glass or fused glass) are excluded from the scope of this standard. Vacuum insulating glass is not covered by this standard (see ISO DIS 19916-1). Glass/plastics composites are under the scope as long as the surface of contact with sealants is a glass component. NOTE For glass products with electrical wiring or connections for, e.g. alarm or heating purposes, other directives, e.g. Low Voltage Directive, may apply. This European Standard gives definitions for insulating glass units and covers the rules for the system description, the optical and visual quality and the dimensional tolerances thereof and describes the substitution rules based on an existing system description. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements 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 572-1, Glass in building - Basic soda lime silicate glass products - Part 1: Definitions and general physical and mechanical properties EN 572-2, Glass in building - Basic soda lime silicate glass products - Part 2: Float glass EN 572-3, Glass in building - Basic soda lime silicate glass products - Part 3: Polished wired glass EN 572-4, Glass in building - Basic soda lime silicate glass products - Part 4: Drawn sheet glass EN 572-5, Glass in building - Basic soda lime silicate glass products - Part 5: Patterned glass EN 572-6, Glass in building - Basic soda lime silicate glass products - Part 6: Wired patterned glass EN 572-8, Glass in building - Basic soda lime silicate glass products - Part 8: Supplied and final cut sizes EN 1279-2:2018, Glass in building - Insulating glass units - Part 2: Long term test method and requirements for moisture penetration EN 1279-3:2018, Glass in building - Insulating glass units - Part 3: Long term test method and requirements for gas leakage rate and for gas concentration tolerances SIST EN 1279-1:2018

EN 1279-1:2018 (E) 7 EN 1279-4:2018, Glass in building - Insulating glass units - Part 4: Methods of test for the physical attributes of edge seal components and inserts EN 1279-5:2018, Glass in building - Insulating glass units -Part 5: Product standards EN 1279-6:2018, Glass in building - Insulating glass units - Part 6: Factory production control and periodic tests EN ISO 12543-1, Glass in building - Laminated glass and laminated safety glass - Part 1: Definitions and description of component parts (ISO 12543-1) EN 13022-1, Glass in building - Structural sealant glazing - Part 1: Glass products for structural sealant glazing systems for supported and unsupported monolithic and multiple glazing ISO 11485-1, Glass in building - Curved glass - Part 1: Terminology and definitions ISO 11485-2, Glass in building - Curved glass - Part 2: Quality requirements 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses:

IEC Electropedia: available at http://www.electropedia.org/

ISO Online browsing platform: available at http://www.iso.org/obp 3.1 insulating glass unit IGU assembly consisting of at least two panes of glass, separated by one or more spacers, hermetically sealed along the periphery, mechanically stable and durable (as specified in 6.1) 3.1.1 IGU type A IGU, when used for installation without permanent shear load in the sealant and protected against direct UV exposure on edge seal 3.1.2 IGU type B IGU, when used for installation with at least one edge not completely protected against direct UV radiation without permanent shear load in the sealant 3.1.3 IGU type C IGU when used for installation as bonded glazing for doors, windows and curtain walling with possible permanent shear load on edge sealant with or without direct UV radiation exposure Note 1 to entry: Permanent shear load can be avoided by mechanical support to carry the weight. Note 2 to entry: For IGU type B and C additional requirements in accordance with EN 15434 and EN 13022-1 may apply. SIST EN 1279-1:2018

EN 1279-1:2018 (E) 8 3.2 bonded glazing for doors, windows and curtain walling assembly in which glass products are fixed to the structural seal frame by means of a sealant that has been shown to be capable of withstanding the load actions applied to the glass products of the structural seal frame Note 1 to entry: Bonded glazing for doors, windows and curtain walling (see prEN 16759) was previously called structural sealant glazing (SSG) and is still used in some already published standards. 3.3 system range of insulating glass units with a common edge seal design, edge seal materials and edge seal components as described in the system description, the range having a similar edge seal performance Note 1 to entry: Examples of edge seal performances are moisture penetration index, gas leakage rate. 3.4 system description description of components and the edge seal of the insulating glass unit in terms relevant to identification, and in terms relevant to edge seal performance, e.g. moisture penetration index, gas loss rate Note 1 to entry: See Annex A. 3.5 permeation geometry geometry of that part of the edge seal of the insulating glass unit through which the moisture and gas transmission takes place Note 1 to entry: For example see Figure 1.

Figure 1 — Example of permeation geometry 3.6 cross-over stress sealant tensile strength value at which its stress/strain curve crosses the line joining a stress of 0,50 MPa and a strain of 50 % Note 1 to entry: Value is determined following EN 1279-4:2018, Annex A. SIST EN 1279-1:2018

EN 1279-1:2018 (E) 9 3.7 cavity gap between the panes of an insulating glass unit 3.8 dehydrated air or gas air or other gas with a low water vapour partial pressure which, when introduced into the cavity, avoid the risk of condensation in the cavity Note 1 to entry: In all parts of EN 1279, the word “gas” refers to other gases or mixture of gases rather than air. 3.9 desiccant component added to the system to absorb or adsorb immersing water vapour in the cavity over time 3.10 edge seal assembled edge of an insulating glass unit, designed to ensure that moisture and gas transmissions between the inside and outside of the unit are limited, with a certain mechanical strength, and with a certain physical and chemical stability 3.11 sealant polymer material that, after application, has sufficient mechanical and physical properties of cohesion and of adhesion to glass and/or spacer for use in edge seals 3.12 hot applied outer sealant polymer material where an elevated temperature is required for application that, after application, has sufficient mechanical and physical properties of cohesion and of adhesion to glass and/or spacer for use in edge seals 3.13 double/dual seal system edge seal system made of at least an inner sealant placed towards the cavity of the IGU and an outer sealant in contact with the environment outside the IGU 3.14 single seal system edge seal system made of one single sealant 3.15 spacer component used to separate the panes and control the width of the cavity at the edge of the insulating glass unit Note 1 to entry: The main families of spacers are given in Figure 2. SIST EN 1279-1:2018

EN 1279-1:2018 (E) 10

Figure 2 — Main families of spacers 3.16 hollow spacer spacer intended to be filled with desiccant 3.17 rigid spacer frame set of hollow spacers, that provide enough rigidity to be

preassembled prior to application and applied against one pane of the insulating glass unit before the assembly Note 1 to entry: examples of rigid spacer frame are a frame bent with joint piece or connected with corner keys, or a welded frame. 3.18 hollow metallic spacer hollow spacer, painted or not, where at least 1/4 of the inner sealant adhesion height r (see Figure 3) and all of the contact surface with outer sealant shall be metallic adhesion surface (see 3.23) 3.19 joint piece piece that connects parts of a spacer SIST EN 1279-1:2018

EN 1279-1:2018 (E) 11 3.20 corner key joint piece that acts as a corner of the spacer frame 3.21 hot applied flexible spacer polymer-based spacer which is applied at elevated temperature Note 1 to entry: this spacer can be either prefabricated or extruded directly onto the glass surface. 3.22 prefabricated flexible spacer polymer based flexible spacer which is supplied as a profile to the IGU manufacturer Note1 to entry: this spacer can either be hot applied or cold applied. 3.23 adhesion surface contact surface between spacer and one or both sealant(s) 3.24 metallic adhesion surface spacer adhesion surface made of rolled or extruded aluminium, galvanised steel, stainless steel, without organic surface treatment Note 1 to entry: Organic surface treatments are painting, organic coating, organic film, or organic overspray. 3.25 insert constituent included in the cavity not directly in contact with the sealants of the edge seal Note 1 to entry: The permeation geometry can be modified as fixings or connections of the inserts may be in contact with the edge seals. 3.26 U-channel spacer spacer made of a U-shaped metal strip generally filled with a desiccant matrix 3.27 desiccant matrix materials based on a polymer containing desiccant placed in a U-channel spacer for the purpose to keep the cavity of the insulating glass unit dry 3.28 desiccant cartridge container with desiccant, placed somewhere in the cavity 3.29 leaded light strip lead strip usually self-adhesive used on surface 1 and/or 2 of the insulating glass unit to simulate leaded light, traditional or modern stained glass effects SIST EN 1279-1:2018

EN 1279-1:2018 (E) 12 3.30 edge deletion process to remove the coating at the edge of a coated glass, which is intended to be the adhesion surface of the sealant(s) 3.31 external condensation condensation appearing on the glass panes of an insulating glass unit either on the room side surface or on the external surface 3.32 internal condensation condensation appearing on the glass panes within a cavity of an insulating glass unit 3.33 absolute limit value of a parameter, given in the system description, which when exceeded requires remedial action in manufacturing, and removal of products from production for repair or destruction Note 1 to entry: For system description, see Annex A. 3.34 action limit value of a parameter, given in the system description, which when exceeded requires remedial action in manufacturing Note 1 to entry: For system description, see Annex A. 3.35 spot fault spherical or semi spherical disturbance of the visual transparency looking through the glass Note 1 to entry: It can be a solid inclusion, a gaseous inclusion, a pinhole in a coating or a spot defect in a laminated glass. 3.36 halo area locally distorted, generally around a point defect when the defect is included in the glass pane 3.37 residue residue is a material that remain on the glass surface, that can have the form of spot or patch Note 1 to entry: It is usually made of the seal material. 3.38 linear/extended faults faults, which can be on or in the glass, in the form of deposits, marks or scratches that occupy an extended length or area 3.39 stain defect larger than punctual defect, often irregularly shaped, partially of mottled structure SIST EN 1279-1:2018

EN 1279-1:2018 (E) 13 3.40 cluster accumulation of very small defects giving the impression of stain 3.41 edge defect defects which can occur on the edge of a cut size piece in the form of entrant and emergent faults and / or bevels 3.42 misalignment displacement of the edges of the glass during the manufacture of insulating glass unit 3.43 water vapour transmission rate

® d «1) quantity of water vapour steadily transmitted through a 2 mm sealant film at specified conditions of temperature and water vapour concentration Note 1 to entry: Water vapour transmission rate (WVTR) was called moisture vapour transmission rate (MVTR) in the previous version of the standard. 3.44 gas permeation rate

® d «1) quantity of gas, steadily transmitted through a 2 mm sealant film at specified conditions of temperature and gas concentration 3.45 standard laboratory conditions ambient temperature of (23 ± 2) °C and relative humidity of (50 ± 5) % 3.46 gas chemical compound or element in gaseous state Note 1 to entry: In the context of this standard gas is all gas other than air. 3.47 standard moisture adsorption capacity Tc (%) Total capacity of a desiccant material to adsorb moisture at specified conditions Note 1 to entry: Tc is expressed as the sum of AWAC and LOI following EN 1279-4:2018, Annex E. 3.48 moisture penetration index I (%) amount of available moisture adsorption capacity consumed SIST EN 1279-1:2018

EN 1279-1:2018 (E) 14 3.49 av
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