ISO 9774:2004

INTERNATIONAL ISO
STANDARD 9774
First edition
2004-10-01


Thermal insulation for building
applications — Guidelines for selecting
properties
Produits isolants thermiques pour le bâtiment — Lignes directrices pour
le choix des charactéristiques




Reference number
ISO 9774:2004(E)
©
ISO 2004

---------------------- Page: 1 ----------------------
ISO 9774:2004(E)
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but
shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.


©  ISO 2004
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 2004 – All rights reserved

---------------------- Page: 2 ----------------------
ISO 9774:2004(E)
Contents Page
Foreword. iv
1 Scope. 1
2 Normative references. 1
3 Applications of thermal-insulation products in buildings. 1
4 Performance characteristics of products according to their application . 2
5 Application categories. 2
Bibliography . 12

© ISO 2004 – All rights reserved iii

---------------------- Page: 3 ----------------------
ISO 9774:2004(E)
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 9774 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 10, Cellular plastics.
It cancels and replaces ISO/TR 9774:1990, which has been technically revised.

iv © ISO 2004 – All rights reserved

---------------------- Page: 4 ----------------------
INTERNATIONAL STANDARD ISO 9774:2004(E)

Thermal insulation for building applications — Guidelines for
selecting properties
1 Scope
This International Standard gives guidelines to the standards writer in selecting thermal-insulation material
properties for standards used in building applications.
These guidelines are not intended to prove the suitability of any particular product for any given application.
When standards are established or existing specifications are revised on the basis of these guidelines, the
performance characteristics in these guidelines should be translated into product requirements (specified
values) in the International Standard for a product or application, together with appropriate test methods,
which must be fulfilled at the time of delivery, in order to ensure that the product provides the performance
requirements in service. This relationship between specified values for the product and the service
performance characteristic of the product in use can be different for different insulating products, depending
on the characteristic of the material (e.g. ageing or time-dependent behaviour).
This International Standard applies only to prefabricated thermal-insulation products, i.e. manufactured mats
and boards including any facings or coverings which may be present, although the basic characteristics may
also be applied to other insulation products, e.g. in situ in systems or components, where appropriate.
The International Standard covers only thermal-insulation products for use in buildings within normal climatic
conditions. It does not cover insulation products for building services, e.g. plumbing and heating, nor insulation
products for industrial use.
Acoustic properties are not included in the properties given in this International Standard, although these may
be additionally required for some fields of application.
2 Normative references
The following referenced documents are indispensable for the application 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.
ISO/TR 9165, Practical thermal properties of building materials and products
3 Applications of thermal-insulation products in buildings
A review of the most common applications of thermal-insulation products in different roof, wall, ceiling and
foundation structures is given in Table 1. The applications are illustrated in more detail in Figure 1.
The purpose of Figure 1 is only to illustrate the applications for the various insulation products and to assist in
relating the performance characteristics of the products to their application. The figure will also assist in
determining requirements for other applications not listed.
The sketches are for illustration only and are not intended as construction drawings: for example, water
vapour barriers and air infiltration barriers which may be necessary are not shown. Waterproofings in the roof
© ISO 2004 – All rights reserved 1

---------------------- Page: 5 ----------------------
ISO 9774:2004(E)
or foundation area are only shown to clarify the position of the insulation layer — in the area affected by
precipitation or ground water or in the area protected against the penetration of water.
4 Performance characteristics of products according to their application
Table 2 lists those properties — for different applications — which need to be considered when preparing
standards and specifications for different products. The performance characteristics necessary for these
properties to ensure serviceable and durable thermal insulation are explained and some values are suggested
in Table 4.
Derived from Table 2, Table 3 gives specific properties which may be necessary only for certain applications.
For additional applications in building, not shown in Figure 1, the properties of the insulation products may be
determined using the information in Tables 2, 3 and 4.
Insulation products used in two or more applications as indicated in Figure 1 shall have all relevant properties
for all the intended applications.
For certain constructions, the knowledge of the water vapour transmission rate and the permeability to air is
necessary. In such cases, the values for these shall be included in the product specification.
For some applications, additional performance criteria may be relevant, e.g. dimensional stability when in
contact with solvents. In such cases, the product specification shall include these additional properties.
5 Application categories
For simplicity, the various applications for insulating products shown in Figure 1 may be grouped into
categories having common performance requirements. It is then the task of the insulation material standards
or specifications to define these categories and the applications which are covered by the categories.
2 © ISO 2004 – All rights reserved

---------------------- Page: 6 ----------------------
ISO 9774:2004(E)

For key, see next page.
NOTE The numbers in parentheses are for use with Tables 1, 2 and 3.
© ISO 2004 – All rights reserved 3

---------------------- Page: 7 ----------------------
ISO 9774:2004(E)
Key
1 flat roof
2 pitched roof
insulating product

waterproofing layer

timber or metallic studs, concrete or rafters

masonry or concrete

rendering

concrete

gravel

ground

Figure 1 — Examples of the most common applications of thermal-insulation products in buildings
4 © ISO 2004 – All rights reserved

---------------------- Page: 8 ----------------------
ISO 9774:2004(E)
Table 1 — Examples of the most common applications of thermal-insulation products in buildings
(for additional information, see sketches in Figure 1)
Sketch
Application
No.
Unloaded insulation between rafters, fully supported 1
Insulation separating rafters and outer covering 2
Pitched
roof
Insulation separating supporting construction and outer covering 3
Insulation beneath rafters 4
Insulation between rafters or beams 5
Roof
Inverted, insulation above roofing membrane including roof gardens and parking decks 6
Flat On steel deck, insulation beneath roofing membrane 7
roof
Accessible to light or heavy traffic or loads from roof garden (soil layer, plants, etc.) and parking decks 8
(concrete pavers or slabs), insulation beneath roofing membrane
Accessible only to maintenance personal, insulation beneath roofing membrane 9
Masonry or concrete wall, external insulation covered by rendering 10
Timber stud construction, outside insulation and rendering directly supported by the studs 11
Timber stud construction, insulation at the internal side with rendering 12
Masonry or concrete wall, fully supported internal insulation supporting light protective internal facing (e.g. 13
gypsum board)
Masonry or concrete wall, internal insulation supporting light protecting facing, partly supported by studs 14
Masonry or concrete wall, internal insulation with heavy self-supported protective internal facing (e.g. tiles 15
at roomside)
Wall
Timber or metal stud construction with boards covering, insulation between the studs 16
Cavity wall construction, insulation between the leaves, cavity ventilated 17
Cavity wall construction, cavity fully filled with insulation, outer leave not watertight 18
Timber or metal stud construction with boards covering, insulation supported by boards; or masonry or 19
concrete wall, supporting the insulation with ventilated exterior covering
Wall under ground, external insulation behind waterproof membrane with mechanical protection 20
Wall under ground, external insulation with direct contact to the ground 21
Cellar or crawlspace hall, internal insulation with or without covering 22
Insulation over the supporting construction or between the beams 23
Ceiling/floor Insulation under load distributing flooring, fully supported 24
Insulation under the construction 25
Concrete, insulation under the slab with direct contact to the ground 26
Concrete, insulation supported by the slab, above waterproof membrane, beneath load distributing flooring 27
Foundation
Concrete, insulation under the slab above waterproof membrane 28
Frost insulation in or against the ground 29

© ISO 2004 – All rights reserved 5

---------------------- Page: 9 ----------------------
ISO 9774:2004(E)
Table 2 — List of relevant properties to be considered according to the application of insulating
material in buildings (0 indicates specification writer should consider this property)
Roof Wall
Application of insulation with reference to
Figure 1 sketch No.
1 2 3 4 5 6 7 8 9 10 11 12 13
...