ISO 24260:2022

INTERNATIONAL ISO
STANDARD 24260
First edition
2022-06
Thermal insulation products — Hemp
fiber mat and board — Specification
Produits d'isolation thermique — Panneaux et tapis en fibres de
chanvre — Spécifications
Reference number
© ISO 2022
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Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Symbols, units and abbreviated terms . 2
4.1 Symbols and units . 2
4.2 Abbreviated terms and symbols used in designations. 3
5 Requirements . 3
5.1 General . 3
5.2 Material properties . 3
5.2.1 Thermal resistance and thermal conductivity . 3
5.2.2 Length and width . . 4
5.2.3 Thickness . 4
5.2.4 Service Temperature . 5
5.2.5 Reaction to fire. 5
5.2.6 Moisture content . 5
5.3 Specific requirements . 5
5.3.1 Apparent density . 5
5.3.2 Sound absorption . 5
5.3.3 Formaldehyde release. 5
6 Test methods . 6
6.1 Sampling . 6
6.2 Conditioning. 6
6.3 Procedure . 6
6.3.1 General . 6
6.3.2 Thermal resistance and thermal conductivity . 7
7 Designation code . . 7
8 Product conformity .8
8.1 General . 8
8.2 Initial type testing (ITT) . 8
8.3 Factory production control (FPC) . 8
9 Marking and labelling . 8
Annex A (normative) Determination of the declared values of thermal resistance and
thermal conductivity . .10
Annex B (normative) Factory production control (FPC) .12
Annex C (normative) Determination of the thermal conductivity in relation to moisture
content .13
Bibliography .15
iii
Foreword
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This document was prepared by Technical Committee ISO/TC 163, Thermal performance and energy use
in the built environment, Subcommittee SC 3, Thermal insulation products, components and systems.
Any feedback or questions on this document should be directed to the user’s national standards body. A
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iv
INTERNATIONAL STANDARD ISO 24260:2022(E)
Thermal insulation products — Hemp fiber mat and board
— Specification
1 Scope
This document specifies requirements for factory-made products of hemp fibre, which are used for the
thermal insulation of buildings. This document applies to material containing more than 50 % (by mass)
natural hemp fibre, with or without the other natural fibre and the balance being polymeric material.
The products are delivered as a mat or board with or without facings.
This document describes product characteristics and testing methods, marking, labelling and
packaging.
Products covered in this document are also used in prefabricated thermal insulation systems and
composite panels. The performance of systems incorporating these products is not covered.
The use of moth proof agent residues is outside the scope of this document.
This document does not address the health and safety aspects associated with its use. It is the
responsibility of the user of this document to establish appropriate health and safety practices.
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 354, Acoustics — Measurement of sound absorption in a reverberation room
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 9229, Thermal insulation — Vocabulary
ISO 11654, Acoustics — Sound absorbers for use in buildings — Rating of sound absorption
ISO 11925-2, Reaction to fire tests — Ignitability of products subjected to direct impingement of flame —
Part 2: Single-flame source test
ISO 12460-1, Wood-based panels — Determination of formaldehyde release — Part 1: Formaldehyde
emission by the 1-cubic-metre chamber method
ISO 12570, Hygrothermal performance of building materials and products — Determination of moisture
content by drying at elevated temperature
ISO 12576-1, Thermal insulation — Insulating materials and products for buildings — Conformity control
systems — Part 1: Factory-made products
ISO 29465, Thermal insulating products for building applications — Determination of length and width
ISO 29466, Thermal insulating products for building applications — Determination of thickness
ISO 29470, Thermal insulating products for building applications — Determination of the apparent density
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 9229 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
production line
equipment that produces products in a continuous process
Note 1 to entry: For initial type test (ITT) and factory production control (FPC), each production line is
considered separately.
3.2
production unit
equipment that produces products in a discontinuous process
Note 1 to entry: For initial type test (ITT) and factory production control (FPC), units using the same process in
one factory are considered together [as one production line (3.1)].
3.3
hemp fibre mat
HFM
soft matted material made from natural hemp fibre as the main (>50 % by mass) material with or
without the other natural fibre and the balance being polymeric material.
3.4
hemp fibre board
HFB
plate type products with certain degree of rigidity made from natural hemp fibre as the main (>50 % by
mass) material with or without the other natural fibre and the balance being polymeric material.
4 Symbols, units and ab
...