Rigid cellular plastics — Thermal insulation products for buildings — Specifications

ISO 4898:2010 specifies requirements and methods of testing for four 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 may also be faced or laminated with foil, plastic or metal films or sheets, mineral coatings, paper, cardboard or other materials. It is not applicable to materials used for the thermal insulation of pipes and vessels, for impact sound absorption or for acoustical insulation. It 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.

Plastiques alvéolaires rigides — Produits d'isolation thermique pour bâtiments — Spécifications

Penjeni polimerni materiali - Toplotnoizolacijski proizvodi za stavbe - Specifikacije

Ta mednarodni standard določa zahteve in metode preskušanja za štiri kategorije toplotnoizolacijskih proizvodov za stavbe iz penjenih polimernih materialov. Zajema penjene polimerne materiale v obliki ravnih ali profiliranih plošč z naravnim plaščem ali brez njega. Lahko so tudi prevlečene ali prekrite s folijo, plastiko ali kovinsko oblogo ali folijo, mineralnimi premazi, papirjem, kartonom ali drugimi materiali.
Ta mednarodni standard se ne uporablja za materiale, ki se uporabljajo za toplotno izolacijo cevi in posod, za absorpcijo udarnega zvoka ali za zvočno izolacijo.
Ta mednarodni standard zajema naslednje penjene materiale, ki se uporabljajo za toplotno izolacijo stavb:
PF na osnovi fenolnega polimera;
EPS na osnovi ekspandiranega polistirena;
XPS na osnovi ekstrudiranega polistirena;
PUR na osnovi poliuretana.
Mejne vrednosti glede kakovosti v tem mednarodnem standardu se uporabljajo le pri specifikaciji materialov med kupcem in dobaviteljem ter niso namenjene za uporabo za potrebe projektiranja.
Dodatne zahteve za posebne načine uporabe se lahko dodajo opredeljenim načinom uporabe iz tega mednarodnega standarda po dogovoru med dobaviteljem in kupcem.

General Information

Status
Withdrawn
Publication Date
23-Feb-2010
Withdrawal Date
23-Feb-2010
Current Stage
9599 - Withdrawal of International Standard
Start Date
21-Mar-2018
Completion Date
21-Mar-2018

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INTERNATIONAL ISO
STANDARD 4898
Fifth edition
2010-03-01
Rigid cellular plastics — Thermal
insulation products for buildings —
Specifications
Plastiques alvéolaires rigides — Produits d'isolation thermique pour
bâtiments — Spécifications
Reference number
ISO 4898:2010(E)
ISO 2010
---------------------- Page: 1 ----------------------
ISO 4898:2010(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.

COPYRIGHT PROTECTED DOCUMENT
© ISO 2010

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 2010 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 4898:2010(E)
Contents Page

Foreword ............................................................................................................................................................iv

1 Scope......................................................................................................................................................1

2 Normative references............................................................................................................................1

3 Terms and definitions ...........................................................................................................................2

4 Sizes and dimensional-tolerance requirements.................................................................................3

5 Physical-property requirements ..........................................................................................................4

5.1 Categories ..............................................................................................................................................4

5.2 Subcategories........................................................................................................................................4

5.3 Limiting quality values..........................................................................................................................4

5.4 Burning characteristics ........................................................................................................................4

6 Sampling.................................................................................................................................................4

7 Conditioning ..........................................................................................................................................5

7.1 Sample panels .......................................................................................................................................5

7.2 Specimens..............................................................................................................................................5

8 Test methods .........................................................................................................................................5

8.1 Linear dimensions.................................................................................................................................5

8.2 Density....................................................................................................................................................5

8.3 Compressive strength...........................................................................................................................5

8.4 Thermal conductivity and resistance..................................................................................................6

8.5 Dimensional stability.............................................................................................................................6

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...........................................................................................................................7

9 Conformity control ................................................................................................................................7

10 Labelling and marking of products .....................................................................................................7

11 Reporting requirements........................................................................................................................7

Annex A (normative) Amendments to ISO 12576-1.......................................................................................12

Bibliography......................................................................................................................................................14

© ISO 2010 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO 4898:2010(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 4898 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 10, Cellular plastics.

This fifth edition cancels and replaces the fourth edition (ISO 4898:2008), of which it constitutes a minor

revision. The main changes are as follows:

⎯ the user now has a choice of three different sets of conditions for conditioning test specimens (see 7.2);

⎯ Clause 7 and Subclause 8.4 have been redrafted to make them clearer;

⎯ what was Subclause 8.5 in the previous edition has been divided into two separate subclauses, 8.5 and

8.6, but without changing the requirements.
iv © ISO 2010 – All rights reserved
---------------------- Page: 4 ----------------------
INTERNATIONAL STANDARD ISO 4898:2010(E)
Rigid cellular plastics — Thermal insulation products for
buildings — Specifications
1 Scope

This International Standard specifies requirements and methods of testing for four 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 may also be faced or laminated with foil, plastic or metal films or

sheets, mineral coatings, paper, cardboard or other materials.

This International Standard is not applicable to materials used for the thermal insulation of pipes and vessels,

for impact sound absorption or for acoustical insulation.

This International Standard 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 International Standard 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 may be added to those specified in this International Standard

by agreement between purchaser and supplier.
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 291, Plastics — Standard atmospheres for conditioning and testing
ISO 472, Plastics — Vocabulary
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 2010 – All rights reserved 1
---------------------- Page: 5 ----------------------
ISO 4898:2010(E)
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
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.
3.1
EPS

rigid cellular plastic material manufactured by moulding beads of expandable polystyrene or one of its

copolymers and which has a substantially closed cell structure, filled with air
[ISO 9229:2007]
3.2
XPS

rigid cellular plastic insulation material expanded and extruded with or without a skin from polystyrene or one

of its copolymers and which has a closed cell structure
[ISO 9229:2007]
3.3
PUR

rigid cellular plastic insulation material with a substantially closed cell structure based on polyurethane or

urethane/isocyanurate polymers

NOTE For definitions of polyisocyanurate plastic, polyurethane and urethane plastic, see ISO 472.

3.4

rigid cellular foam, the polymer structure of which is made primarily from the polycondensation of phenol, its

homologues and/or derivatives with aldehydes or ketones
[ISO 9229:2007]

NOTE 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.

2 © ISO 2010 – All rights reserved
---------------------- Page: 6 ----------------------
ISO 4898:2010(E)
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.

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
Length or width Tolerance on length or width on differences in diagonal
measurements
mm mm mm
< 1 000 ±8 5
W 1 000 ±10 5

If more restrictive tolerances are required, these shall be agreed between purchaser and supplier.

Tolerance categories for diagonal measurements are based on the board length (not width).

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
Thickness Tolerance
mm mm
< 50 ±2
50 to 75 (incl.) ±3
> 75 to 100 (incl.) ±3
> 100 To be agreed between purchaser and supplier

If more restrictive tolerances are required, these shall be agreed between purchaser and supplier.

For EPS with natural skins, the thickness tolerance for this thickness category shall be ±4 mm.

© ISO 2010 – All rights reserved 3
---------------------- Page: 7 ----------------------
ISO 4898:2010(E)
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.

Categories III and IV 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 these categories may also be used for applications listed in categories I and II.

5.2 Subcategories

Product property categories I to III can be further divided into subcategories (A, B, C) on the basis of thermal-

conductivity values. All thermal-conductivity specification values given for the subcategories in the tables are

maximum values.

Thermal-conductivity values given in the tables shall be used only as limiting quality values for specification of

materials between purchaser and supplier. They shall not be used for design purposes.

5.3 Limiting quality values

EPS materials shall conform to the limiting quality values for physical properties as specified in Table 3.

XPS materials shall conform to the limiting quality values for physical properties as specified in Table 4.

PUR materials shall conform to the limiting quality values for physical properties as specified in Table 5.

PF materials shall conform to the limiting quality values for physical properties as specified in Table 6.

5.4 Burning characteristics

It is recognized that there is a need to consider the burning characteristics of these materials in their intended

application. Therefore, until such time as International Standards become available, individual national

practice should be followed.

NOTE Due to compositional and processing parameters, some PF materials may exhibit smouldering combustion

(punking).
6 Sampling
6.1 For density determinations, ten
...

SLOVENSKI STANDARD
SIST ISO 4898:2015
01-marec-2015
1DGRPHãþD
SIST ISO 4898:1996

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 4898:2010
ICS:
83.100 Penjeni polimeri Cellular materials
91.100.60 0DWHULDOL]DWRSORWQRLQ Thermal and sound insulating
]YRþQRL]RODFLMR materials
SIST ISO 4898:2015 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST ISO 4898:2015
---------------------- Page: 2 ----------------------
SIST ISO 4898:2015
INTERNATIONAL ISO
STANDARD 4898
Fifth edition
2010-03-01
Rigid cellular plastics — Thermal
insulation products for buildings —
Specifications
Plastiques alvéolaires rigides — Produits d'isolation thermique pour
bâtiments — Spécifications
Reference number
ISO 4898:2010(E)
ISO 2010
---------------------- Page: 3 ----------------------
SIST ISO 4898:2015
ISO 4898:2010(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.

COPYRIGHT PROTECTED DOCUMENT
© ISO 2010

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 2010 – All rights reserved
---------------------- Page: 4 ----------------------
SIST ISO 4898:2015
ISO 4898:2010(E)
Contents Page

Foreword ............................................................................................................................................................iv

1 Scope......................................................................................................................................................1

2 Normative references............................................................................................................................1

3 Terms and definitions ...........................................................................................................................2

4 Sizes and dimensional-tolerance requirements.................................................................................3

5 Physical-property requirements ..........................................................................................................4

5.1 Categories ..............................................................................................................................................4

5.2 Subcategories........................................................................................................................................4

5.3 Limiting quality values..........................................................................................................................4

5.4 Burning characteristics ........................................................................................................................4

6 Sampling.................................................................................................................................................4

7 Conditioning ..........................................................................................................................................5

7.1 Sample panels .......................................................................................................................................5

7.2 Specimens..............................................................................................................................................5

8 Test methods .........................................................................................................................................5

8.1 Linear dimensions.................................................................................................................................5

8.2 Density....................................................................................................................................................5

8.3 Compressive strength...........................................................................................................................5

8.4 Thermal conductivity and resistance..................................................................................................6

8.5 Dimensional stability.............................................................................................................................6

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...........................................................................................................................7

9 Conformity control ................................................................................................................................7

10 Labelling and marking of products .....................................................................................................7

11 Reporting requirements........................................................................................................................7

Annex A (normative) Amendments to ISO 12576-1.......................................................................................12

Bibliography......................................................................................................................................................14

© ISO 2010 – All rights reserved iii
---------------------- Page: 5 ----------------------
SIST ISO 4898:2015
ISO 4898:2010(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 4898 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 10, Cellular plastics.

This fifth edition cancels and replaces the fourth edition (ISO 4898:2008), of which it constitutes a minor

revision. The main changes are as follows:

⎯ the user now has a choice of three different sets of conditions for conditioning test specimens (see 7.2);

⎯ Clause 7 and Subclause 8.4 have been redrafted to make them clearer;

⎯ what was Subclause 8.5 in the previous edition has been divided into two separate subclauses, 8.5 and

8.6, but without changing the requirements.
iv © ISO 2010 – All rights reserved
---------------------- Page: 6 ----------------------
SIST ISO 4898:2015
INTERNATIONAL STANDARD ISO 4898:2010(E)
Rigid cellular plastics — Thermal insulation products for
buildings — Specifications
1 Scope

This International Standard specifies requirements and methods of testing for four 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 may also be faced or laminated with foil, plastic or metal films or

sheets, mineral coatings, paper, cardboard or other materials.

This International Standard is not applicable to materials used for the thermal insulation of pipes and vessels,

for impact sound absorption or for acoustical insulation.

This International Standard 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 International Standard 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 may be added to those specified in this International Standard

by agreement between purchaser and supplier.
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 291, Plastics — Standard atmospheres for conditioning and testing
ISO 472, Plastics — Vocabulary
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 2010 – All rights reserved 1
---------------------- Page: 7 ----------------------
SIST ISO 4898:2015
ISO 4898:2010(E)
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
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.
3.1
EPS

rigid cellular plastic material manufactured by moulding beads of expandable polystyrene or one of its

copolymers and which has a substantially closed cell structure, filled with air
[ISO 9229:2007]
3.2
XPS

rigid cellular plastic insulation material expanded and extruded with or without a skin from polystyrene or one

of its copolymers and which has a closed cell structure
[ISO 9229:2007]
3.3
PUR

rigid cellular plastic insulation material with a substantially closed cell structure based on polyurethane or

urethane/isocyanurate polymers

NOTE For definitions of polyisocyanurate plastic, polyurethane and urethane plastic, see ISO 472.

3.4

rigid cellular foam, the polymer structure of which is made primarily from the polycondensation of phenol, its

homologues and/or derivatives with aldehydes or ketones
[ISO 9229:2007]

NOTE 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.

2 © ISO 2010 – All rights reserved
---------------------- Page: 8 ----------------------
SIST ISO 4898:2015
ISO 4898:2010(E)
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.

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
Length or width Tolerance on length or width on differences in diagonal
measurements
mm mm mm
< 1 000 ±8 5
W 1 000 ±10 5

If more restrictive tolerances are required, these shall be agreed between purchaser and supplier.

Tolerance categories for diagonal measurements are based on the board length (not width).

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
Thickness Tolerance
mm mm
< 50 ±2
50 to 75 (incl.) ±3
> 75 to 100 (incl.) ±3
> 100 To be agreed between purchaser and supplier

If more restrictive tolerances are required, these shall be agreed between purchaser and supplier.

For EPS with natural skins, the thickness tolerance for this thickness category shall be ±4 mm.

© ISO 2010 – All rights reserved 3
---------------------- Page: 9 ----------------------
SIST ISO 4898:2015
ISO 4898:2010(E)
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.

Categories III and IV 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 these categories may also be used for applications listed in categories I and II.

5.2 Subcategories

Product property categories I to III can be further divided into subcategories (A, B, C) on the basis of thermal-

conductivity values. All thermal-conductivity specification values given for the subcategories in the tables are

maximum values.

Thermal-conductivity values given in the tables shall be used only as limiting quality values for specification of

materials between purchaser and supplier. They shall not be used for design purposes.

5.3 Limiting quality values

EPS materials shall conform to the limiting quality values for physical properties as specified in Table 3.

XPS materials shall conform to the limiting quality values for physical properties as specified in Table 4.

PUR materials shall conform to the limiting quality values for physical properties as specified in Table 5.

PF materials shall conform to the limiting quality values for physical properties as specifi

...

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