ISO/FDIS 8144-2

ISO/TC 163/SC 03/WG 19 3
Secretariat: SCC
Date: 2025-08-26
Thermal insulation – — Mineral wool mats for ventilated spaces – —
Part 2:
Specification for horizontal applications with unrestricted
ventilation
Isolation thermique – Feutres en laine minérale pour espaces ventilés – Partie 2: Spécifications pour application
horizontale avec ventilation non-restreinte
FDIS stage
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ii
Contents
Foreword . iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Sampling and conformity control . 2
5 Required properties . 2
5.1 Dimensions . 2
5.2 Fire behaviour . 2
5.3 Thermal resistance . 3
5.4 Handling properties . 4
5.5 General properties . 4
6 Marking . 4
7 Test report . 5
Annex A (normative) Determination of handling properties of mats (batts or rolls) . 6
Annex B (normative) Determination of the declared values of thermal resistance and thermal
conductivity . 10
Bibliography . 13

iii
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
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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 document 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).
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patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent rights
in respect thereof. As of the date of publication of this document, ISO had not received notice of (a) patent(s)
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Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee [or Project Committee] ISO/TC [or ISO/PC] ###, [name
of committee],163, Thermal performance and energy use in the built environment, Subcommittee SC ##, [name
of subcommittee], in collaboration with the European Committee for Standardization (CEN) Technical
Committee CEN/TC ###, [name of committee], in accordance with the Agreement on technical cooperation
between ISO and CEN (Vienna Agreement).3, Thermal insulation products, components and systems.
This second edition cancels and replaces the first edition (ISO 8144-2:1995), which has been technically
revised.
The main changes are as follows:
— — added references to dimensional testing;
— — revised testing procedure for thermal conductivity and thermal resistance.
A list of all parts in the ISO 8144 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
Thermal insulation – — Mineral wool mats for ventilated spaces – —
Part 2:
Specification for horizontal applications with unrestricted ventilation
1 Scope
This document specifies the properties and acceptance tolerances for bonded man-made mineral wool
thermal insulating mats (batts and rolls). The mats specified in this document are only intended to be used for
horizontal applications with unrestricted ventilation, where any excess of thickness recovery of the insulation
mat will not restrict the essential ventilation space. See ISO 9774-:2004, Figure 1 for typical locations.
The mineral wool mats which are specified in ISO 8144-1 are primarily intended for use in applications where
any excess of thickness must be limited.
This document provides limiting values for most of the properties. These limiting values are for specification
purposes only; design values can be derived from these by considering the environmental factors affecting the
thermal performance of the product, the influence of the product properties on installation, and the effect of
workmanship on the thermal performance. For converting declared R-values to design values, see ISO 10456.
Mats can be supplied with a factory-applied facing, but facings are not covered by this document.
In general, mats are not designed to support any applied load. For this reason, only the mechanical properties
required for adequate handling during application are specified.
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 7345, Thermal performance of buildings and building components — Physical quantities and definitions
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 12491, Statistical methods for quality control of building materials and components
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 29467, Thermal insulating products for building applications — Determination of squareness
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 terminologicalterminology 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 3.1
mineral wool
fibrous thermal insulation material manufactured from molten rock, slag, or glass
3.2 3.2
mat
flexible fibrous insulation supplied in the form of rolls or batts, which maycan be faced but not enclosed
3.3 3.3
batt
portion of an insulation mat in the form of a rectangular piece, between 1 m and 3 m in length and supplied
flat or folded
3.4 3.
roll
insulation product supplied in the form of a wound cylinder
4 Sampling and conformity control
Conformity control shall be in accordance with ISO 12576-1. Manufacturer shall declare which option they
have chosen.
5 Required properties
5.1 Dimensions
The manufacturer shall declare the nominal length, width, and thickness of the mats.
These dimensions shall be measured in accordance with ISO 29465 (length and width), ISO 29466 (thickness)
and ISO 29467 (squareness) and shall be subject to the tolerances detailed in Table 1Table 1.
5.2 Fire behaviour
The fire behaviour of the insulation materials, including any facings, shall be declared in compliance to the fire
regulations and codes that apply in the locality in which they are applied.
Table 1 — Dimensional tolerances
Dimension Permissible deviations of Test method
measured values from
nominal dimensions
Length, l - 2 %, + excess permitted on ISO 29465
average of measured values
for each single specimen
Dimension Permissible deviations of Test method
measured values from
nominal dimensions
Width, b ±1,5 % or ±10 mm, whichever ISO 29465
is less, on average of
measured values for each
single specimen
Thickness, d - 5 % or – 5 mm, whichever is ISO 29466
less, on average of measured
values for each single
specimen.
+ excess permitted on
average of measured values
for each single specimen
For any single specimen, the
measured thickness at each
individual measuring point
shall not deviate by more
than 15 mm from the mean of
measurements on that
specimen
Squareness of For each 1 m along the ISO 29467
batts (rolls shortest face dimension, the
need not be maximum deviation shall be
tested) more than 5 mm
5.3 Thermal resistance
The thermal transmission properties of a product shall be declared by the manufacturer as either thermal
resistance, R , or thermal conductivity, λ , in accordance with ISO 7345. The mean test temperature shall also
D D
be declared.
Thermal resistance and thermal conductivity shall be based upon measurements carried out and shall be
determined in accordance with Annex BAnnex B,, ISO 8301 and ISO 8302 and declared by the manufacturer
according to the following:
— — The reference mean
...