ISO 12572:2016/Amd 1:2024
(Amendment)Hygrothermal performance of building materials and products - Determination of water vapour transmission properties - Cup method - Amendment 1
Hygrothermal performance of building materials and products - Determination of water vapour transmission properties - Cup method - Amendment 1
Performance hygrothermique des matériaux et produits pour le bâtiment — Détermination des propriétés de transmission de la vapeur d'eau — Méthode de la coupelle — Amendement 1
General Information
- Status
- Published
- Publication Date
- 06-Oct-2024
- Technical Committee
- ISO/TC 163/SC 1 - Test and measurement methods
- Drafting Committee
- ISO/TC 163/SC 1/WG 8 - Moisture content and moisture permeability
- Current Stage
- 6060 - International Standard published
- Start Date
- 07-Oct-2024
- Due Date
- 28-Mar-2025
- Completion Date
- 07-Oct-2024
Relations
- Consolidates
ISO/IEC 24392:2023 - Cybersecurity - Security reference model for industrial internet platform (SRM- IIP) - Effective Date
- 28-Oct-2023
- Effective Date
- 28-Oct-2023
Overview
ISO 12572:2016/Amd 1:2024 is an important international standard that updates the methodology for assessing the hygrothermal performance of building materials and products. Specifically, it addresses the determination of water vapour transmission properties using the established cup method. This amendment refines the procedures to enhance accuracy and consistency in measuring how building materials interact with moisture vapor under varying environmental conditions.
Developed by ISO Technical Committee ISO/TC 163 in collaboration with the European Committee for Standardization (CEN), this document ensures global alignment for testing materials’ water vapour transmission properties-critical for optimizing building durability, energy efficiency, and indoor air quality.
Key Topics
Water Vapour Resistance Factor (μ):
The amendment revises subclause 8.6 to clearly define the calculation of the water vapour resistance factor, μ, which quantifies a material’s resistance to water vapour diffusion compared to air.- μ is calculated using Formula (7), relating water vapour permeability of air and material.
- The Schirmer formula (Formula 8) is introduced to determine the water vapour permeability of air (δₐ) based on mean barometric pressure and temperature.
Influence of Barometric Pressure:
The amendment highlights that both air and material vapour permeabilities vary with barometric pressure, but μ remains effectively independent of these changes when calculated correctly. Ensuring δₐ corresponds to actual barometric pressure is vital for accurate measurements.Use of the Cup Method:
The standard continues to promote the cup method-a widely accepted test technique where a material sample seals a container with controlled humidity conditions inside. Water vapour transmission rates are then measured, enabling assessment of material performance under realistic hygrothermal conditions.
Applications
ISO 12572:2016/Amd 1:2024 applies broadly in the building and construction industry to evaluate moisture-related properties of materials such as:
- Insulation products
- Vapor barriers and retarders
- Wall and roofing assemblies
- Facade materials
- Flooring underlays
By providing reliable data on water vapour transmission, this test supports:
- Building envelope design to prevent moisture accumulation and related damages like mold growth or structural deterioration
- Improved energy efficiency by optimizing vapor control layers
- Compliance with international building codes and green construction standards that demand rigorous moisture management
- Material development and quality assurance for manufacturers aiming to meet performance benchmarks
Related Standards
- ISO 13788: Hygrothermal performance of building components-internal surface temperature to avoid condensation and mould growth
- ISO 8990: Thermal insulation-determination of steady-state thermal transmission properties-guarded hot plate apparatus
- EN 12572: European equivalent standard describing the cup method for water vapour transmission
- ISO/IEC Directives, Part 1 & 2: Governing protocols for developing and maintaining international standards
These complementary standards integrate with ISO 12572 to provide comprehensive guidance for assessing and mitigating hygrothermal risks in building envelopes.
Keywords: ISO 12572:2016/Amd 1:2024, water vapour transmission, hygrothermal performance, building materials, cup method, water vapour resistance factor, barometric pressure, moisture control, building envelope, vapor diffusion, construction standards.
ISO 12572:2016/Amd 1:2024 - Hygrothermal performance of building materials and products — Determination of water vapour transmission properties — Cup method — Amendment 1 Released:7. 10. 2024
ISO 12572:2016/Amd 1:2024 - Performance hygrothermique des matériaux et produits pour le bâtiment — Détermination des propriétés de transmission de la vapeur d'eau — Méthode de la coupelle — Amendement 1 Released:7. 10. 2024
Frequently Asked Questions
ISO 12572:2016/Amd 1:2024 is a standard published by the International Organization for Standardization (ISO). Its full title is "Hygrothermal performance of building materials and products - Determination of water vapour transmission properties - Cup method - Amendment 1". This standard covers: Hygrothermal performance of building materials and products - Determination of water vapour transmission properties - Cup method - Amendment 1
Hygrothermal performance of building materials and products - Determination of water vapour transmission properties - Cup method - Amendment 1
ISO 12572:2016/Amd 1:2024 is classified under the following ICS (International Classification for Standards) categories: 91.120.10 - Thermal insulation of buildings. The ICS classification helps identify the subject area and facilitates finding related standards.
ISO 12572:2016/Amd 1:2024 has the following relationships with other standards: It is inter standard links to ISO/IEC 24392:2023, ISO 12572:2016. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ISO 12572:2016/Amd 1:2024 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
Standard
ISO 12572
Second edition
Hygrothermal performance
2016-08-01
of building materials and
products — Determination of
AMENDMENT 1
water vapour transmission
2024-10
properties — Cup method
AMENDMENT 1
Performance hygrothermique des matériaux et produits pour le
bâtiment — Détermination des propriétés de transmission de la
vapeur d'eau — Méthode de la coupelle
AMENDEMENT 1
Reference number
ISO 12572:2016/Amd.1:2024(en) © ISO 2024
ISO 12572:2016/Amd.1:2024(en)
© ISO 2024
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 12572:2016/Amd.1:2024(en)
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,
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with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
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patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which
...
Norme
internationale
ISO 12572
Deuxième édition
Performance hygrothermique
2016-08-01
des matériaux et produits pour
le bâtiment — Détermination des
AMENDEMENT 1
propriétés de transmission de la
2024-10
vapeur d'eau — Méthode de la
coupelle
AMENDEMENT 1
Hygrothermal performance of building materials and
products — Determination of water vapour transmission
properties — Cup method
AMENDMENT 1
Numéro de référence
ISO 12572:2016/Amd.1:2024(fr) © ISO 2024
ISO 12572:2016/Amd.1:2024(fr)
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2024
Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en œuvre, aucune partie de cette
publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique,
y compris la photocopie, ou la diffusion sur l’internet ou sur un intranet, sans autorisation écrite préalable. Une autorisation peut
être demandée à l’ISO à l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
ISO copyright office
Case postale 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Genève
Tél.: +41 22 749 01 11
E-mail: copyright@iso.org
Web: www.iso.org
Publié en Suisse
ii
ISO 12572:2016/Amd.1:2024(fr)
Avant-propos
L’ISO (Organisation internationale de normalisation) est une fédération mondiale d’organismes nationaux
de normalisation (comités membres de l’ISO). L’élaboration des Normes internationales est en général
confiée aux comités techniques de l’ISO. Chaque comité membre intéressé par une étude a le droit de faire
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gouvernementales, en liaison avec l’ISO participent également aux travaux. L’ISO collabore étroitement avec
la Commission électrotechnique internationale (IEC) en ce qui concerne la normalisation électrotechnique.
Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont
décrites dans les Directives ISO/IEC, Partie 1. Il convient, en particulier, de prendre note des différents
critères d'approbation requis pour les différents types de documents ISO. Le présent document
a été rédigé conformément aux règles de rédaction données dans les Directives ISO/IEC, Partie 2
(voir https://www.iso.org/directives).
L’ISO attire l’attention sur le fait que la mise en application du présent document peut entraîner l’utilisation
d’un ou de plusieurs brevets. L’ISO ne prend pas position quant à la preuve, à la validité et à l’applicabilité
de tout droit de brevet revendiqué à cet égard. À la date de publication du présent document, l’ISO n’avait
pas reçu notification qu’un ou plusieurs brevets pouvaient être nécessaires à sa mise en application.
Toutefois, il y a lieu d’avertir les responsables de la mise en application du présent document que des
informations plus ré
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