ISO 29765:2008
(Main)Thermal insulating products for building applications — Determination of tensile strength perpendicular to faces
Thermal insulating products for building applications — Determination of tensile strength perpendicular to faces
ISO 29765:2008 specifies the equipment and procedures for determining the tensile strength of a product perpendicular to its faces. ISO 29765:2008 is applicable to thermal insulating products.
Produits isolants thermiques destinés aux applications du bâtiment — Détermination de la résistance à la traction perpendiculairement aux faces
General Information
- Status
- Published
- Publication Date
- 28-Oct-2008
- Technical Committee
- ISO/TC 163/SC 1 - Test and measurement methods
- Drafting Committee
- ISO/TC 163/SC 1 - Test and measurement methods
- Current Stage
- 9093 - International Standard confirmed
- Start Date
- 11-Jun-2025
- Completion Date
- 12-Feb-2026
Relations
- Effective Date
- 09-Feb-2026
Overview
ISO 29765:2008 specifies a standardized test method to determine the tensile strength perpendicular to faces of thermal insulating products used in buildings. The standard defines the equipment, specimen preparation, conditioning, test procedure and result reporting so manufacturers, test laboratories and specifiers can obtain comparable, reproducible tensile-strength data for insulation materials.
Key topics and technical requirements
- Scope: Applies to thermal insulating products and covers equipment and procedures for measuring tensile strength perpendicular to faces (σmt).
- Principle: A square-prism specimen is bonded between two rigid plates/blocks, loaded in a tensile testing machine and pulled at constant speed until failure. The maximum force is recorded and tensile strength calculated as F/A.
- Apparatus:
- Tensile testing machine with constant crosshead speed of (10 ± 1) mm/min and force measurement accuracy ±1%.
- Self-aligning rigid plates or blocks to avoid uneven stress distribution.
- Adhesive compatible with the product (must not reinforce or damage surface layers; avoid damaging hot adhesives or incompatible solvents).
- Specimens:
- Thickness equals original product thickness including skins/facings/coatings.
- Recommended square cross sections: 50×50, 100×100, 150×150, 200×200 or 300×300 mm (use sizes specified in the relevant product standard).
- At least 5 specimens if the product standard does not specify a number.
- Cut so base is normal to in-use tensile direction; retain facings/skins; avoid edges (preferably ≥15 mm from edges).
- Conditioning and test conditions:
- Standard conditioning: at least 6 h at (23 ± 5) °C; in dispute use (23 ± 2) °C and 50 ± 5% RH.
- For tropical conditions: 27 °C and 65% RH (must be recorded in the report).
- Calculation and results:
- Tensile strength σmt = F (kN) / A (m²). Report mean value to two significant figures.
- Discard specimens failing in the adhesive layer.
- Accuracy / precision:
- 95% repeatability ≈ 5%; 95% reproducibility ≈ 15% (per ISO 5725 principles).
Applications and who uses it
- Quality control and production testing for insulation manufacturers.
- Independent testing laboratories and certification bodies for compliance and product labeling.
- Product development / R&D to compare materials and facings.
- Architects, specifiers and building engineers who require performance data for material selection.
- Procurement and building code compliance verification.
Related standards
ISO 29765 is part of a suite of ISO test methods for thermal insulating products (examples):
- ISO 29768 (dimensions of test specimens)
- ISO 29470 (apparent density)
- ISO 29766 / ISO 29767 (tensile strength parallel to faces / short-term water absorption)
- ISO 29469 / ISO 29472 (compression behaviour / dimensional stability)
Keywords: ISO 29765:2008, tensile strength perpendicular to faces, thermal insulating products, tensile testing, specimen conditioning, insulation test method, building insulation testing.
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Frequently Asked Questions
ISO 29765:2008 is a standard published by the International Organization for Standardization (ISO). Its full title is "Thermal insulating products for building applications — Determination of tensile strength perpendicular to faces". This standard covers: ISO 29765:2008 specifies the equipment and procedures for determining the tensile strength of a product perpendicular to its faces. ISO 29765:2008 is applicable to thermal insulating products.
ISO 29765:2008 specifies the equipment and procedures for determining the tensile strength of a product perpendicular to its faces. ISO 29765:2008 is applicable to thermal insulating products.
ISO 29765:2008 is classified under the following ICS (International Classification for Standards) categories: 91.100.60 - Thermal and sound insulating materials. The ICS classification helps identify the subject area and facilitates finding related standards.
ISO 29765:2008 has the following relationships with other standards: It is inter standard links to EN 16382:2026. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ISO 29765:2008 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 29765
First edition
2008-11-01
Thermal insulating products for building
applications — Determination of tensile
strength perpendicular to faces
Produits isolants thermiques destinés aux applications du bâtiment —
Détermination de la résistance à la traction perpendiculairement aux
faces
Reference number
©
ISO 2008
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© ISO 2008
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ii © ISO 2008 – All rights reserved
Contents Page
Foreword. iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions. 1
4 Principle. 1
5 Apparatus . 2
6 Test specimens . 3
7 Procedure . 4
8 Calculation and expression of results. 4
9 Accuracy of measurement. 4
10 Test report . 5
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 29765 was prepared by Technical Committee ISO/TC 163, Thermal performance and energy use in the
built environment, Subcommittee SC 1, Test and measurement methods.
iv © ISO 2008 – All rights reserved
Introduction
This International Standard comprises the original EN 1607:1996 and EN 1607:1996/AC:1997 prepared by
Technical Committee CEN/TC 88, Thermal insulating materials and products, which have been amended by
ISO/TC 163/SC 1 with reference to conditioning and testing conditions in tropical countries.
This International Standard is one of a series of documents specifying test methods, based on existing
European Standards, that are being adopted by ISO. This “package” of standards includes the following group
of interrelated documents.
International Standard Respective
EN standard
ISO 29465, Thermal insulating products for building applications — Determination of length EN 822
and width
ISO 29466, Thermal insulating products for building applications — Determination of EN 823
thickness
ISO 29467, Thermal insulating products for building applications — Determination of EN 824
squareness
ISO 29468, Thermal insulating products for building applications — Determination of flatness EN 825
ISO 29469, Thermal insulating products for building applications — Determination of EN 826
compression behaviour
ISO 29470, Thermal insulating products for building applications — Determination of the EN 1602
apparent density
ISO 29471, Thermal insulating products for building applications — Determination of EN 1603
dimensional stability under constant normal laboratory conditions (23 °C/50 % relative
humidity)
ISO 29472, Thermal insulating products for building applications — Determination of EN 1604
dimensional stability under specified temperature and humidity conditions
ISO 29764, Thermal insulating products for building applications — Determination of EN 1605
deformation under specified compressive load and temperature conditions
ISO 29765, Thermal insulating products for building applications — Determination of tensile EN 1607
strength perpendicular to faces
ISO 29766, Thermal insulating products for building applications — Determination of tensile EN 1608
strength parallel to faces
ISO 29767, Thermal insulating products for building applications — Determination of short- EN 1609
term water absorption by partial immersion
ISO 29768, Thermal insulating products for building applications — Determination of linear EN 12085
dimensions of test specimens
ISO 29769, Thermal insulating products for building applications — Determination of EN 12430
behaviour under point load
ISO 29770, Thermal insulating products for building applications — Determination of EN 12431
thickness for floating-floor insulating products
ISO 29771, Thermal insulating materials for building applications — Determination of organic EN 13820
content
ISO 29803, Thermal insulation products for building applications — Determination of the EN 13497
resistance to impact of external thermal insulation composite systems (ETICS)
ISO 29804, Thermal insulation products for building applications — Determination of the EN 13494
tensile bond strength of the adhesive and of the base coat to the thermal insulation material
ISO 29805, Thermal insulation products for building applications — Determination of the EN 13496
mechanical properties of glass fibre meshes
vi © ISO 2008 – All rights reserved
INTERNATIONAL STANDARD ISO 29765:2008(E)
Thermal insulating products for building applications —
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