Glass in building — Coated glass — Part 1: Physical defects

This part of ISO 11479 specifies optical quality requirements for coatings applied to glass using either pyrolytic, sol-gel or vacuum (sputtering) deposition methods for use in building glazing. More specifically, this part of ISO 11479 relates to low-e and solar-control coated glass. This part of ISO 11479 is not applicable to patterned or other optically distorting glass.

Verre dans la construction — Verre à couche — Partie 1: Défauts physiques

General Information

Status
Published
Publication Date
29-Sep-2011
Current Stage
9093 - International Standard confirmed
Start Date
14-Jun-2024
Completion Date
14-Feb-2026

Overview

ISO 11479-1:2011 – Glass in building - Coated glass - Part 1: Physical defects is an international standard developed by the International Organization for Standardization (ISO) to establish optical quality requirements for coated glass in architectural applications. Focusing specifically on physical defects, this standard applies to glass coatings created through pyrolytic, sol-gel, or vacuum (sputtering) deposition processes. It addresses the needs of manufacturers, architects, and quality control professionals dealing with low-emissivity (low-e) and solar-control coated glass for building glazing. Importantly, ISO 11479-1:2011 is not applicable to patterned or other optically distorting glass types.

Key Topics

ISO 11479-1:2011 outlines a series of critical points for assessing the quality of coated glass intended for buildings:

  • Coating Deposition Methods: Covers pyrolytic (applied to hot glass during production), sol-gel (wet coating), and vacuum deposition (sputtering in a vacuum chamber).
  • Physical Defects: Defines and addresses various types of coating defects, including:
    • Coating rubs (surface abrasion)
    • Corrosion (coating degradation)
    • Crazing (fine cracks or lines)
    • Punctual defects such as spots, pinholes, and scratches
    • Stains (irregular, patchy defects larger than punctual defects)
  • Defect Detection and Examination:
    • Visual inspection in both reflected and transmitted light using daylight or artificial sky illumination
    • Defined examination conditions, including proper viewing angles (not exceeding 30° from perpendicular) and designated inspection zones (central and edge areas on both finished and stock sizes)
  • Acceptance Criteria:
    • Quantitative and qualitative limits for the number and size of defects allowed within specified areas
    • Distinction between central and edge zones in terms of permitted defect densities

Applications

ISO 11479-1:2011 is essential for ensuring the optical quality of coated glass used in building façades, windows, and curtain walls. Its main applications include:

  • Manufacturing and Quality Control: Glass manufacturers use this standard for product quality assurance, ensuring only glass that meets strict optical standards is supplied for glazing.
  • Construction and Architecture: Architects and builders specify ISO 11479-1:2011-compliant glass to assure clients of high-quality, visually appealing installations without unacceptable visible defects.
  • Inspection and Certification: Quality inspection professionals rely on its criteria for on-site evaluations and certification processes, reducing the risk of disputes over glass quality in new builds and renovations.
  • Enhanced Energy Efficiency: By covering low-e and solar-control coatings, the standard helps projects achieve energy efficiency targets while maintaining visual quality.

Related Standards

For a comprehensive approach to the use of coated glass in buildings, ISO 11479-1:2011 should be used alongside other relevant standards:

  • ISO 11479-2 – Glass in building - Coated glass - Part 2: Colour of façade (for assessing appearance and color matching)
  • CIE 13.3 Method of measuring and specifying colour rendering properties of light sources (referenced for defining artificial sky conditions in inspections)
  • Other glass quality and performance standards such as EN 1096 (Glass in building - Coated glass), and national regulations for safety and performance

By following ISO 11479-1:2011, professionals in the architectural glass and building sectors can ensure transparent quality management, robust defect identification, and confidence in the use of high-performance coated glass products. This leads to both higher customer satisfaction and improved building aesthetics and sustainability.

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Frequently Asked Questions

ISO 11479-1:2011 is a standard published by the International Organization for Standardization (ISO). Its full title is "Glass in building — Coated glass — Part 1: Physical defects". This standard covers: This part of ISO 11479 specifies optical quality requirements for coatings applied to glass using either pyrolytic, sol-gel or vacuum (sputtering) deposition methods for use in building glazing. More specifically, this part of ISO 11479 relates to low-e and solar-control coated glass. This part of ISO 11479 is not applicable to patterned or other optically distorting glass.

This part of ISO 11479 specifies optical quality requirements for coatings applied to glass using either pyrolytic, sol-gel or vacuum (sputtering) deposition methods for use in building glazing. More specifically, this part of ISO 11479 relates to low-e and solar-control coated glass. This part of ISO 11479 is not applicable to patterned or other optically distorting glass.

ISO 11479-1:2011 is classified under the following ICS (International Classification for Standards) categories: 81.040.20 - Glass in building. The ICS classification helps identify the subject area and facilitates finding related standards.

ISO 11479-1:2011 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


INTERNATIONAL  ISO
STANDARD 11479-1
First edition
2011-10-01
Glass in building — Coated glass —
Part 1:
Physical defects
Verre dans la construction — Verre à couche — Partie 1: Défauts
physiques
Reference number
ISO 11479-1:2011(E)
©
ISO 2011
©  ISO 2011
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO’s
member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2011 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Terms and definitions . 1
2.1 Basic definitions . 1
2.2 Definition of physical defects . 2
3 Physical defects . 3
3.1 General . 3
3.2 Detection of defects . 3
3.3 Conditions of examination . 3
3.4 Punctual defects . 5
3.5 Acceptance criteria for coated glass defects . 6
Bibliography . 7
© ISO 2011 – All rights reserved  iii

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International
Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 11479-1 was prepared by Technical Committee ISO/TC 160,  Glass in building, Subcommittee SC 1,
Product considerations.
ISO 11479 consists of the following parts, under the general title Glass in building — Coated glass:
—  Part 1: Physical defects
—  Part 2: Colour of façade
iv © ISO 2011 – All rights reserved

INTERNATIONAL STANDARD ISO 11479-1:2011(E)
Glass in building — Coated glass —
Part 1:
Physical defects
1 Scope
This part of ISO 11479 specifies optical quality requirements for coatings applied to glass using either pyrolytic,
sol-gel or vacuum (sputtering) deposition methods for use in building glazing. More specifically, this part of
ISO 11479 relates to low-e and solar-control coated glass. This part of ISO 11479 is not applicable to patterned
or other optically distorting glass.
2 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
2.1 Basic definitions
2.1.1
method of deposition
method of adding a single or multilayer coating consisting of metal, oxide, nitride, fluoride or other compound
to the surface of the glass by vacuum (sputtering), sol-gel or pyrolytic deposition
2.1.2
coated glass
glass substrate to which a coating has been applied on one or both sides in order to modify one or more of
its properties
2.1.3
coating
one or more layers applied to the glass using either the pyrolytic, sol-gel or vacuum (sputtering) deposition method
2.1.4
finished size glass
flat glass sheet cut to the dimensions required for final fabrication or use
2.1.5
stock size glass
jumbo size glass
standard size of annealed flat glass sheet that may be cut down to a smaller finished size for fabrication
2.1.6
daylight illumination
uniform overcast sky, with or without direct sunlight
2.1.7
glass substrate
glass to which the coating is applied to either one or both sides
NOTE  Examples of glass substrates are: basic float glass (clear or body-tinted), thermally or chemically toughened
safety glass, thermally toughened borosilicate safety glass, heat-strengthened glass, heat-strengthened borosilicate
glass, laminated glass, laminated safety glass, alkaline earth silicate glass, or toughened alkaline earth silicate glass.
© ISO 2011 – All rights reserved  1

2.1.8
pyrolytic deposition
online coating
method of manufacture of a coating, whereby the coating is applied to hot glass, usually at the time of flat glass
manufacturing
2.1.9
sol-gel coating
offline coating
method of manufacture of a coating, whereby the coating is applied to flat glass on a wet coating line
2.1.10
vacuum deposition
offli
...

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