SIST ISO 4898:2020

SLOVENSKI STANDARD
SIST ISO 4898:2020
01-september-2020
Penjeni polimerni materiali - Toplotnoizolacijski proizvodi za stavbe - Specifikacije
Rigid cellular plastics - Thermal insulation products for buildings - Specifications
Plastiques alvéolaires rigides -- Produits d'isolation thermique pour bâtiments --
Spécifications
Ta slovenski standard je istoveten z: ISO 4898:2018
ICS:
83.100 Penjeni polimeri Cellular materials
91.100.60 Materiali za toplotno in Thermal and sound insulating
zvočno izolacijo materials
SIST ISO 4898:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ISO 4898:2020

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SIST ISO 4898:2020
INTERNATIONAL ISO
STANDARD 4898
Sixth edition
2018-03
Rigid cellular plastics — Thermal
insulation products for buildings —
Specifications
Plastiques alvéolaires rigides — Produits d'isolation thermique pour
bâtiments — Spécifications
Reference number
ISO 4898:2018(E)
©
ISO 2018

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SIST ISO 4898:2020
ISO 4898:2018(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2018
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.
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Phone: +41 22 749 01 11
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Email: copyright@iso.org
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Published in Switzerland
ii © ISO 2018 – All rights reserved

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SIST ISO 4898:2020
ISO 4898:2018(E)

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Sizes and dimensional-tolerance requirements . 2
5 Physical-property requirements . 3
5.1 Categories . 3
5.2 Subcategories . 3
5.3 Limiting quality values . 4
5.4 Burning characteristics . 4
6 Sampling . 4
7 Conditioning . 4
7.1 Sample panels . 4
8 Test methods . 4
8.1 Linear dimensions . 4
8.2 Density . 5
8.3 Compressive strength . 5
8.4 Thermal conductivity . 5
8.4.1 General. 5
8.4.2 Initial thermal conductivity . 5
8.4.3 Long-term thermal resistance . 5
8.5 Dimensional stability . 5
8.6 Compressive creep at elevated temperature . 6
8.7 Water vapour permeability . 6
8.8 Water absorption . 6
8.9 Bending load at break . 6
9 Conformity control . 6
10 Labelling and marking of products . 6
11 Reporting requirements . 7
Annex A (normative) Amendments to ISO 12576-1 .11
Bibliography .13
© ISO 2018 – All rights reserved iii

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SIST ISO 4898:2020
ISO 4898:2018(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.
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 documents 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).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: www .iso .org/ iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 10, Cellular
plastics.
This sixth edition cancels and replaces the fifth edition (ISO 4898:2010), of which it constitutes a minor
revision.
The changes compared to the previous edition are as follows:
— product Category IV has been removed as this type of product is not made.
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SIST ISO 4898:2020
INTERNATIONAL STANDARD ISO 4898:2018(E)
Rigid cellular plastics — Thermal insulation products for
buildings — Specifications
1 Scope
This document specifies requirements and methods of testing for three categories of rigid cellular
plastics thermal-insulation products for buildings. It covers rigid cellular plastics in the form of flat or
profiled boards, with or without natural skins. They can also be faced or laminated with foil, plastic or
metal films or sheets, mineral coatings, paper, cardboard or other materials.
This document is not applicable to materials used for the thermal insulation of pipes and vessels, for
impact sound absorption or for acoustical insulation.
This document covers the following cellular materials used in the thermal insulation of buildings:
— PF based on phenolic polymer;
— EPS based on expanded polystyrene;
— XPS based on extruded polystyrene;
— PUR based on polyurethane.
The limiting quality values in this document are for use only in the specification of materials between
purchaser and supplier, and are not intended to be used for design purposes.
Additional requirements for special applications can be added to those specified in this document by
agreement between purchaser and supplier.
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.
ISO 291, Plastics — Standard atmospheres for conditioning and testing
ISO 844, Rigid cellular plastics — Determination of compression properties
ISO 845, Cellular plastics and rubbers — Determination of apparent density
ISO 1040, Building construction — Modular coordination — Multimodules for horizontal coordinating
dimensions
ISO 1209-1, Rigid cellular plastics — Determination of flexural properties — Part 1: Basic bending test
ISO 1663, Rigid cellular plastics — Determination of water vapour transmission properties
ISO 1923, Cellular plastics and rubbers — Determination of linear dimensions
ISO 2796, Cellular plastics, rigid — Test for dimensional stability
ISO 2896, Rigid cellular plastics — Determination of water absorption
ISO 7616, Cellular plastics, rigid — Determination of compressive creep under specified load and
temperature conditions
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ISO 4898:2018(E)

ISO 7850, Cellular plastics, rigid — Determination of compressive creep
ISO 8301, Thermal insulation — Determination of steady-state thermal resistance and related properties —
Heat flow meter apparatus
ISO 8302, Thermal insulation — Determination of steady-state thermal resistance and related properties —
Guarded hot plate apparatus
ISO 11561, Ageing of thermal insulation materials — Determination of the long-term change in thermal
resistance of closed-cell plastics (accelerated laboratory test methods)
ISO 12576-1:2001, Thermal insulation — Insulating materials and products for buildings — Conformity
control systems — Part 1: Factory-made products
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 https:// www .iso .org/ obp
3.1
EPS
rigid cellular plastics insulation material manufactured by moulding beads of expandable polystyrene
or one of its copolymers and that has a substantially closed-cell structure, filled with air
[SOURCE: ISO 9229]
3.2
XPS
rigid cellular plastics insulation material expanded and extruded with or without a skin from
polystyrene or one of its copolymers and that has a closed-cell structure
[SOURCE: ISO 9229]
3.3
PUR
rigid cellular plastics insulation material with a substantially closed-cell structure based on
polyurethane or urethane/isocyanurate polymers
Note 1 to entry: For definitions of polyisocyanurate plastic, polyurethane and urethane plastic, see ISO 472.
3.4
PF
rigid cellular insulation foam, the polymer structure of which is made primarily from the
polycondensation of phenol, its homologues and/or derivatives with aldehydes or ketones
Note 1 to entry: PF used for thermal-insulation purposes has a cellular structure consisting substantially of
closed cells (subcategory A) or with a higher content of open cells (subcategory B) which affects the thermal
conductivity.
[SOURCE: ISO 9229, modified – Note 1 to entry has been added.]
4 Sizes and dimensional-tolerance requirements
4.1 Board materials shall be supplied in dimensions agreed between purchaser and supplier or in
accordance with ISO 1040. Boards shall be flat.
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ISO 4898:2018(E)

4.2 Dimensional tolerances for length, width and squareness shall conform to the requirements
specified in Table 1.
Table 1 — Tolerances for dimensions and squareness
Squareness tolerances
based on differences
a
Length or width Tolerance on length or width
in diagonal measure-
b c
ments
mm mm mm
<1 000 ±8 5
≥1 000 ±10 5
a
If more restrictive tolerances are required, these shall be agreed between purchaser and supplier.
b
Tolerance categories for diagonal measurements are based on the board length (not width).
c
Squareness may also be determined by equivalent methods such as the use of a rectangular pattern.
4.3 Dimensional tolerances for thickness shall conform to the requirements specified in Table 2.
Table 2 — Tolerances for thickness
a
Thickness Tolerance
mm mm
<50 ±2
50 to 75 (incl.) ±3
b
>75 to 100 (incl.) ±3
>100 To be agreed between purchaser and supplier
a
If more restrictive tolerances are required, these shall be agreed between purchaser and supplier.
b
For EPS with natural skins, the thickness tolerance for this thickness category shall be ±4 mm.
5 Physical-property requirements
5.1 Categories
Physical-property requirements are organized into product categories to meet purchaser and supplier
needs over a range of end-use applications.
Category I — Suitable for non-load-bearing applications such as wall and cavity insulation, vented
roofs, cavity wall insulation and similar applications.
Category II — Suitable for limited load-bearing applications such as in built-up roofs, under floors and
comparable applications, where elevated temperatures may be encountered and where compressive
creep resistance is required. Products in this category may also be used for applications listed in
category I.
Category III — Suitable for load-bearing applications such as in parking decks, floors of cold-storage
areas and comparable applications requiring a higher level of compressive strength and compressive
creep resistance. Products in this category may also be used for applications listed in categories I and II.
5.2 Subcategories
Product property categories I to III can be furth
...