prEN 13238

SLOVENSKI STANDARD
01-junij-2025
Preskusi odziva gradbenih proizvodov na ogenj - Postopki kondicioniranja in
splošna pravila za izbiro podlag
Reaction to fire tests for building products - Conditioning procedures and general rules
for selection of substrates
Prüfungen zum Brandverhalten von Bauprodukten - Konditionierungsverfahren und
allgemeine Regeln für die Auswahl von Trägerplatten
Essais de réaction au feu des produits de construction - Modes opératoires de
conditionnement et règles générales de sélection des substrats
Ta slovenski standard je istoveten z: prEN 13238
ICS:
13.220.50 Požarna odpornost Fire-resistance of building
gradbenih materialov in materials and elements
elementov
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2025
ICS 13.220.50 Will supersede EN 13238:2010
English Version
Reaction to fire tests for building products - Conditioning
procedures and general rules for selection of substrates
Essais de réaction au feu des produits de construction - Prüfungen zum Brandverhalten von Bauprodukten -
Modes opératoires de conditionnement et règles Konditionierungsverfahren und allgemeine Regeln für
générales de sélection des substrats die Auswahl von Trägerplatten
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 127.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 13238:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Conditioning procedures . 6
4.1 General. 6
4.2 Conditioning to constant mass . 7
4.3 Conditioning for a fixed period . 7
5 General rules for selection of substrates . 7
5.1 General. 7
5.2 Standard substrates for floorings . 7
5.3 Standard substrates for construction products excluding floorings . 8
Bibliography . 12

European foreword
This document (prEN 13238:2025) has been prepared by Technical Committee CEN/TC 127 “Fire safety
in buildings”, the secretariat of which is held by BSI.
This document will supersede EN 13238:2010.
This document has been prepared under a standardization request addressed to CEN by the European
Commission. The Standing Committee of the EFTA States subsequently approves these requests for its
Member States.
Introduction
The Construction Products Regulation (CPR) requires products to be tested in their end use condition
which, for the purpose of substrates, could lead to an economically unrealistic large variety of tests to be
carried out. This large spectrum has been reduced to a practical number of standard substrates that
enables the majority of end use conditions to be represented. Rules for the selection of such substrates
are given in this document.
This document is intended for use in conjunction with European Standards covering the reaction to fire
test methods for the relevant construction products.
1 Scope
This document describes the conditioning procedures for test specimens which will be tested according
to the European standards for reaction to fire.
The rules for the selection of substrates for construction products when carrying out reaction to fire tests
are also detailed in this document.
This document does not contain requirements for
- the pre-drying of test specimens for the non-combustibility test according EN ISO 1182;
- methods of cleaning (e.g. washing) and other methods for the assessment of durability aspects, which
are dealt with in the relevant product standards.
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.
EN 13501-1, Fire classification of construction products and building elements ― Part 1: Classification using
data from reaction to fire tests
EN 13823, Reaction to fire tests for building products ― Building products excluding floorings exposed to
the thermal attack by a single burning item
EN 14390, Fire test ― Large-scale room reference test for surface products
EN 16733, Reaction to fire tests for building products - Determination of a building products propensity to
smoulder
CEN/TS 1187, Test methods for external fire exposure to roofs
EN ISO 1182, Reaction to fire tests for building products — Non-combustibility test
EN ISO 1716, Reaction to fire tests for building products ― Determination of the heat of combustion
EN ISO 9239-1, Reaction to fire tests for floorings — Part 1: Determination of the burning behaviour using
a radiant heat source
EN ISO 11925-2, Reaction to fire tests ― Ignitability of building products subjected to direct impingement
of flame – Part 2: Single-flame source test
EN ISO 13943, Fire safety — Vocabulary
ISO 1887, Textile glass — Determination of combustible-matter content
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN ISO 13943 and the following
apply.
3.1
material
single basic substance or uniformly dispersed mixture of substances, e.g. metal, stone, timber, concrete,
mineral wool with uniformly dispersed binder or polymers
3.2
product
material, element or component about which information is required
3.3
substrate
product which is used beneath the product about which information is required
Note 1 to entry: For a flooring, it is the floor on which the flooring is mounted or the material which represents this
floor.
3.4
standard substrate
product which is representative of the substrate used in end use applications
3.5
test specimen
piece of the product which is to be tested together with or without any substrate or treatment
Note 1 to entry: The test specimen may include an air gap.
3.6
conditioning
exposure to a controlled atmosphere
4 Conditioning procedures
4.1 General
Test specimens used by the laboratory to conduct tests according to EN ISO 1182, EN ISO 1716,
EN ISO 9239-1, EN ISO 11925-2, EN 13823, EN 14390, EN 16733 and CEN/TS1187 shall be conditioned
at a temperature of (23 ± 2) °C and a relative humidity of (50 ± 5) %.
NOTE 1 This corresponds to the recommended atmosphere and normal tolerances given in ISO 554.
NOTE 2 The tole
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