SIST EN 16977:2021

SLOVENSKI STANDARD
SIST EN 16977:2021
01-januar-2021
Toplotnoizolacijski proizvodi za stavbe - Industrijsko izdelani proizvodi iz
kalcijevih silikatov (CS) - Specifikacija
Thermal insulation products for buildings - Factory made calcium silicate (CS) products -
Specification
Wärmedämmstoffe für Gebäude - Werkmäßig hergestellte Produkte aus Calciumsilicat
(CS) - Spezifikation
Produits isolants thermiques pour le bâtiment - Produits manufacturés en silicate de
calcium (CS) - Spécification
Ta slovenski standard je istoveten z: EN 16977:2020
ICS:
91.100.60 Materiali za toplotno in Thermal and sound insulating
zvočno izolacijo materials
SIST EN 16977:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 16977:2021

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SIST EN 16977:2021


EN 16977
EUROPEAN STANDARD

NORME EUROPÉENNE

November 2020
EUROPÄISCHE NORM
ICS 91.100.60
English Version

Thermal insulation products for buildings - Factory made
calcium silicate (CS) products - Specification
Produits isolants thermiques pour le bâtiment - Wärmedämmstoffe für Gebäude - Werkmäßig
Produits manufacturés en silicate de calcium (CS) - hergestellte Produkte aus Calciumsilikat (CS) -
Spécifications Spezifikation
This European Standard was approved by CEN on 28 September 2020.

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. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.

This European Standard exists 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, Turkey and
United Kingdom.





EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 16977:2020 E
worldwide for CEN national Members.

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SIST EN 16977:2021
EN 16977:2020 (E)
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms, definitions, symbols, units and abbreviated terms . 5
3.1 Terms and definitions . 5
3.2 Symbols, units and abbreviated terms . 7
4 Characteristics . 8
4.1 Reaction to fire . 8
4.2 Release of VOCs . 9
4.3 Rate of release of corrosive substances . 9
4.4 Compressive strength . 9
4.5 Bending strength . 9
4.6 Thermal resistance . 9
4.7 Dimensional stability under specified temperature and humidity conditions . 10
4.8 Water absorption . 10
4.9 Water vapour transmission. 10
5 Assessment methods . 10
5.1 General . 10
5.2 Test methods . 12
6 Assessment and verification of constancy of performance - AVCP . 15
6.1 General . 15

6.2 Assessment of performance . 16
6.3 Verification of constancy of performance . 17
Annex A (normative) Determination of the declared values of thermal resistance and
thermal conductivity . 20
Annex B (normative) Factory Production Control (FPC) . 22
Annex C (normative) CS multi-layered insulation products . 26
Annex D (normative) Determination of the thermal conductivity in relation to moisture
content . 27
Annex ZA (informative) Relationship of this European Standard with Regulation (EU)
No.305/2011 . 29
Bibliography . 34

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SIST EN 16977:2021
EN 16977:2020 (E)
European foreword
This document (EN 16977:2020) has been prepared by Technical Committee CEN/TC 88 “Thermal
insulating materials and products”, the secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of
an identical text or by endorsement, at the latest by May 2021 and conflicting national standards
shall be withdrawn at the latest by August 2022.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under a standardization request given to CEN by the European
Commission and the European Free Trade Association.
For relationship with (EU) Regulation 305/2011, see informative Annex ZA, which is an integral part of
this document.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: 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, Turkey and the
United Kingdom.
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SIST EN 16977:2021
EN 16977:2020 (E)
1 Scope
This document specifies the characteristics for factory made calcium silicate (CS) products with or
without lamination or coating intended to be used for the thermal insulation of buildings.
This document is applicable for materials with the main crystal phases Xonotlite and Tobermorite with
or without Wollastonite.
This document is applicable for products which are manufactured in the form of boards, segments and
prefabricated ware.
This document is applicable for multi-layered CS products.
The products covered by this documents can be used in roofs, walls, ceilings and floors.
This document specifies procedures for assessment and verification of constancy of performance
(AVCP) of characteristics of factory made calcium silicate products (CS).
This document does not cover:
— products intended to be used for the insulation of building equipment and industrial installations;
— products intended to be used for civil engineering works;
— with a declared thermal conductivity greater than 0,078 W/(mK) at 10 °C;
— aerated concrete, autoclaved aerated concrete, mineral foam insulating products and sand-lime
bricks;
— in situ insulation products.
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.
EN 822:2013, Thermal insulating products for building applications - Determination of length and width
EN 823:2013, Thermal insulating products for building applications - Determination of thickness
EN 824:2013, Thermal insulating products for building applications - Determination of squareness
EN 825:2013, Thermal insulating products for building applications - Determination of flatness
EN 826:2013, Thermal insulating products for building applications - Determination of compression
behaviour
EN 1604:2013, Thermal insulating products for building applications - Determination of dimensional
stability under specified temperature and humidity conditions
EN 12086:2013, Thermal insulating products for building applications - Determination of water vapour
transmission properties
EN 12667:2001, Thermal performance of building materials and products - Determination of thermal
resistance by means of guarded hot plate and heat flow meter methods - Products of high and medium
thermal resistance
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SIST EN 16977:2021
EN 16977:2020 (E)
EN 12939:2000, Thermal performance of building materials and products - Determination of thermal
resistance by means of guarded hot plate and heat flow meter methods - Thick products of high and
medium thermal resistance
EN 13468:2001, Thermal insulating products for building equipment and industrial installations -
Determination of trace quantities of water soluble chloride, fluoride, silicate, sodium ions and pH
EN 13501-1:2018, Fire classification of construction products and building elements - Part 1:
Classification using data from reaction to fire tests
EN 13820:2003, Thermal insulating materials for building applications - Determination of organic
content
EN 13823:2020, Reaction to fire tests for building products - Building products excluding floorings
exposed to the thermal attack by a single burning item
EN 15715:2009, Thermal insulation products - Instructions for mounting and fixing for reaction to fire
testing - Factory made products
EN 16516:2017+A1:2020, Construction products: Assessment of release of dangerous substances -
Determination of emissions into indoor air
EN ISO 1182:2020, Reaction to fire tests for products - Non-combustibility test (ISO 1182:2020)
EN ISO 1716:2018, Reaction to fire tests for products - Determination of the gross heat of combustion
(calorific value) (ISO 1716:2018)
EN ISO 9229:2020, Thermal insulation - Vocabulary (ISO 9229:2020)
EN ISO 10456:2007, Building materials and products - Hygrothermal properties - Tabulated design values
and procedures for determining declared and design thermal values (ISO 10456:2007)
EN ISO 11925-2:2020, Reaction to fire tests - Ignitability of products subjected to direct impingement of
flame - Part 2: Single-flame source test (ISO 11925-2:2020)
EN ISO 15148:2002/A1:2016, Hygrothermal performance of building materials and products -
Determination of water absorption coefficient by partial immersion – Amendment 1 (ISO
15148:2002/Amd 1:2016)
ISO 16269-6:2014, Statistical interpretation of data - Part 6: Determination of statistical tolerance
intervals
3 Terms, definitions, symbols, units and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in EN ISO 9229:2020 and the
following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• ISO Online browsing platform: available at https://www.iso.org/obp
• IEC Electropedia: available at http://www.electropedia.org/
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SIST EN 16977:2021
EN 16977:2020 (E)
3.1.1
calcium silicate
insulation material comprising hydrated calcium silicate, normally reinforced by incorporating fibres
3.1.2
board; slab
rigid or semi-rigid (insulation) product of rectangular shape and cross section in which the thickness is
uniform and substantially smaller than the other dimensions
Note 1 to entry: Boards are usually thinner than slabs. Boards and slabs can also be supplied in tapered form.
3.1.3
segment
rigid or semi-rigid insulation product for application to large diameter cylindrical or spherical
equipment
3.1.4
facing
functional or decorative surface layer with a thickness of less than 3 mm, e.g. paper, plastic film, fabric
or metal foil, which is not considered as separate thermal insulation layer to be added to the thermal
resistance of the product
3.1.5
coating
functional or decorative surface layer with a thickness of less than 3 mm usually applied by painting,
spraying, pouring or trowelling, which is not considered as separate thermal insulation layer to be
added to the thermal resistance of the product
3.1.6
composite insulation product
product which can be faced or coated made from two or more layers bonded together by chemical or
physical adhesion consisting of at least one factory made thermal insulation material layer
3.1.7
multi-layered insulation product
product which can be faced or coated made from two or more layers of a thermal insulation material
from the same European Standard, which are bonded together horizontally by chemical or physical
adhesion
3.1.8
production lot
definite quantity produced per maximum 24 h of some commodity manufactured or produced under
conditions which are presumed uniform
3.1.9
production line
assemblage of equipment that produces products using a continuous process
3.1.10
production unit
assemblage of equipment that produces products using a discontinuous process
Note 1 to entry: For PTD and FPC, units using the same process in one factory.
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EN 16977:2020 (E)
3.2 Symbols, units and abbreviated terms
For the purposes of this document, the following symbols, units and abbreviated terms apply.
α the coefficient describing the influence of moisture on the thermal –
conductivity
α the practical sound absorption coefficient –
p
α the weighted sound absorption coefficient –
w
b the width mm
d the thickness mm
d the nominal thickness of the product mm
N
l the length mm
Δε the relative change in width %
b
Δε the relative change in thickness %
d
Δε the relative change in length %
l
k a factor related to the number of test results available –
λ the thermal conductivity W/(m⋅K)
λ a 90 % fractile with a confidence level of 90 % for the thermal conductivity W/(m⋅K)
90/90
λ the declared thermal conductivity W/(m⋅K)
D
λ the mean thermal conductivity W/(m⋅K)
mean
λ the thermal conductivity in the dry state W/(m⋅K)
10,dry
λ the design thermal conductivity W/(m⋅K)
U
m the mass of specimen in the dry state at 23 °C kg
dry
m the mass of specimen at 23 °C and 50 % relative humidity kg
23,50
μ the water vapour diffusion resistance factor –
2
R the declared thermal resistance
m ⋅K/W
D
2
R the 90 % fractile with a confidence level of 90 % for the thermal resistance
m ⋅K/W
90/90
2
R the design thermal resistance
m ⋅K/W
U
S the deviation from squareness on length and width mm/m
b
S the deviation from squareness on thickness mm/m
d
S the deviation from flatness mm
max
2
s the estimate of the standard deviation of the thermal resistance
m ⋅K/W
R
s the estimate of the standard deviation of the thermal conductivity W/(m⋅K)
λ
σ the bending strength kPa
b
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SIST EN 16977:2021
EN 16977:2020 (E)
σ the compressive strength kPa
m
σ the compressive stress at 10 % deformation kPa
10
u the moisture content by mass at 23 °C and 50 % relative humidity kg/kg
23,50
2
W the short-term water absorption by partial immersion
kg/m
p
2
Z the water vapour resistance
m ⋅h⋅Pa/mg
2 0,5
W the water absorption coefficient
kg/(m h )
w
CS(10\Y) the symbol of the level for compressive stress or compressive strength
DS(70,-) the symbol of the declared value for dimensional stability under specified temperature
conditions
DS(23,90) the symbol of the declared value for dimensional stability under specified temperature and
or relative humidity conditions
DS(70,90)
MU the symbol of the declared value for water vapour diffusion resistance factor
WA the symbol of the declared value of water absorption coefficient

AVCP is Assessment and Verification of Constancy of Performance
(previously named attestation of conformity)
CS Calcium Silicate
DoP Declaration of Performance
FPC Factory Production Control
NPD No Performance Declared
PTD Product-type Determination
RtF Reaction to Fire
ThIB Thermal Insulation for Buildings
4 Characteristics
4.1 Reaction to fire
4.1.1 Determination
Reaction to fire classification shall be determined in accordance to 5.2.1.
4.1.2 Expression
The reaction to fire shall be classified and expressed according to EN 13501-1:2018, Clause 11.
EXAMPLE Class A1.
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EN 16977:2020 (E)
4.2 Release of VOCs
4.2.1 Determination
The release of VOCs into indoor air shall be determined in accordance to 5.2.2.
4.2.2 Expression
The release of VOCs into indoor air shall be expressed as values in accordance to
EN 16516:2017+A1:2020, 10.6.
4.3 Rate of release of corrosive substances
4.3.1 Determination
The rate of release of corrosive substances (trace quantities of water-soluble ions and pH-value) shall
be determined in accordance to 5.2.3.
4.3.2 Expression
The rate of release of corrosive substances (trace quantities of water-soluble ions and pH-value) shall
be expressed as values in accordance to EN 13468:2001.
4.4 Compressive strength
4.4.1 Determination
The Compressive strength shall be determined in accordance to 5.2.4.
4.4.2 Evaluation and Expression
The compressive strength shall be expressed as a designation code CS(Y)i or CS(10)i, depending on the
result of the testing of 5.2.4. The test result i shall be rounded downwards in steps of 100 kPa.
EXAMPLE 1 CS(Y)0, when the test result is lower than 100 kPa
EXAMPLE 2 CS(Y)1000
EXAMPLE 3 CS(10)1500
4.5 Bending strength
4.5.1 Determination
The bending strength shall be determined in accordance to 5.2.5.
4.5.2 Expression
The bending strength, σ , shall be expressed as a designation code BS. The value of the bending
b
strength, σ , shall be rounded downwards in steps of 100 kPa.
b
EXAMPLE BS200
4.6 Thermal resistance
4.6.1 Determination
The thermal resistance shall be determined according to 5.2.6.
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4.6.2 Expression
2
The thermal resistance shall be rounded downwards to the nearest 0,05 m ⋅K/W and be expressed as a
2
value in m ⋅K/W. It shall be expressed together with thermal conductivity rounded upwards in steps of
0,000 5 W/(m⋅K) and expressed as a value in W/(m⋅K). It shall be expressed together with the thickness
given as a value in mm.
2
EXAMPLE R = 4,60 m ⋅K/W (λ = 0,0065 W/(m⋅K), d= 30 mm).
D D
4.7 Dimensional stability under specified temperature and humidity conditions
4.7.1 Determination
Dimensional stability under specified temperature or under specified temperature and humidity
conditions shall be determined in accordance to 5.2.7.
4.7.2 Expression
Dimensional stability under specified temperature or under specified temperature and humidity
conditions shall be expressed as a code in the following way: If the relative changes in length and width
do not exceed 1 % and the relative reduction in thickness does not exceed 3 %, the code shall be DS.
Otherwise the code shall be NoDS.
EXAMPLE DS
4.8 Water absorption
4.8.1 Determination
The water absorption shall be determined in accordance to 5.2.8.
4.8.2 Expression
2 0,5
The test results shall be expressed as a value in [kg/(m h )].
4.9 Water vapour transmission
4.9.1 Determination
The water vapour transmission shall be determined in accordance to 5.2.9.
4.9.2 Expression
The water vapour transmission properties shall be expressed as the water vapour diffusion resistance
factor, μ, for homogeneous products (EN 12086:2013, 8.6) and as the water vapour resistance, Z, in
2
[m ·h·Pa/mg] for faced or non-homogeneous products (EN 12086:2013, 8.4).
5 Assessment methods
5.1 General
5.1.1 Sampling
2
Test specimens shall be taken from the same sample with a total area not less than 0,5 m and a length
and width according to Table 1. The shorter side of the sample shall not be less than 300 mm or full size
of the product, whichever is the smaller. The test may be performed on the unfaced/uncoated product,
if the facing/coating is known to have no relevance to the test result.
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EN 16977:2020 (E)
5.1.2 Conditioning
No special conditioning of the test specimens is needed unless otherwise specified in the test standard.
In case of dispute, the test specimens shall be stored at (23 ± 2) °C and (50 ± 5) % relative humidity for
at least 6 h prior to testing. For FPC no special conditioning of the test specimens is needed.
When cut from boards test specimens shall be stored in an atmosphere of (23 ± 2) °C and (50 ± 5) %
relative humidity until stabilization at constant weight is achieved. Stabilization is obtained when the
relative change in weight does not exceed 0,5 % between two consecutive weekly measurements. In
case of dispute, the following stepwise procedure shall be carried out:
— Step 1 (dry reference): The specimens are stored for 72 h at (70 ± 2) °C, in an oven ventilated
with an air taken at (23 ± 2) °C and (50 ± 5) % relative humidity, and
then weighed. The mass of the test specimen at Step 1 is m .
dry
— Step 2 (normal reference): After conditioning according to step 1, the specimens are stored in an
atmosphere of (23 ± 2) °C and (50 ± 5) % relative humidity until
stabilization, and then weighed. Stabilization, by definition, takes at
least six weeks with some additional time so that the relative change in
moisture does not increase by more than 5 % between two consecutive
weekly measurements. The mass of the test specimen at Step 2 is
m . Moisture content, u , expressed in kilogram per kilogram,
23,50 23,50
shall be determined by weighing the specimens at each step with an
accuracy of 0,1 g, and calculated using Formula (1):
m − m
23,50 dry
u =
(1)
23,50
m
dry
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SIST EN 16977:2021
EN 16977:2020 (E)
Table 1 — Characteristics and test specimens
Dimensions in millimetres
Clause Test specimen length and width
No Title
Reaction to fire See EN 13501-1:2018 and
5.2.1
EN 15715:2009
Release of VOCs See EN 16516:2017+A1:2020
5.2.2
Rate of release of corrosive substances Delivered sizes
5.2.3
Compressive strength See EN 826:2013, 6.1
5.2.4
Bending strength See EN 12089:2013, Method B
5.2.5
Thermal conductivity See EN 12667:2001
5.2.6.2
or EN 12939:2000
Length and width, Thickness Delivered sizes
5.2.6.3
Squareness Delivered sizes
5.2.6.4
Flatness Delivered sizes
5.2.6.5
Dimensional stability under specified temperature and 200 × 200
5.2.7
humidity conditions
Water absorption 100 × 100
5.2.8
Water vapour transmission See EN 12086:2013, 6.1
5.2.9
5.2 Test methods
5.2.1 Reaction to fire
Reaction to fire classification shall be determined in accordance with the test methods given in
EN 13501-1:2018, Clause 8, relevant for the intended class. The mounting and fixing conditions shall be
done in accordance with EN 15715:2009.
Manufacturers declaring Euroclass A1 without further test shall demonstrate by testing in accordance
with EN 13820:2003 that the products do not contain more than 1,0 % by weight or volume (whichever
is the more onerous) of homogeneously distributed organic material.
NOTE The Commission Decision 96/603/EC of 4 October 1996, amended by the Commission Decisions
2000/605/EC of 26 September 2000 and 2003/424/EC of 6 June 2003, gives the list of materials, and products
made with them, considered as reaction to fire class A1 without the need for testing.
5.2.2 Release of VOCs
The release of VOCs into indoor air shall be tested according to EN 16516:2017+A1:2020.
5.2.3 Rate of release of corrosive substances
The rate of release of corrosive substances (trace quantities of water-soluble ions and pH-value) shall
be tested according to EN 13468:2001.
5.2.4 Compressive strength
Compressive stress at 10 % deformation, σ , or the compressive strength, σ , shall be determined in
10 m
accordance with EN 826:2013.
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5.2.5 Bending strength
Bending strength shall be determined in accordance with EN 12089:2013, Method B.
5.2.6 Thermal resistance
5.2.6.1 General
For the determination of the thermal resistance the following characteristics are needed:
— Thermal conductivity (5.2.6.2)
— Length, width and thickness (5.2.6.3)
— Squareness (5.2.6.4)
— Flatness (5.2.6.5)
5.2.6.2 Thermal conductivity
Thermal conductivity shall be based upon measurements carried out in accordance with
EN 12667:2001 or EN 12939:2000 for thick products and in accordance with 5.2 and Annex D.
For multi-layer products additional assessment conditions are given in Annex C.
The thermal conductivity shall be determined in accordance with Annex A, and declared by the
manufacturer according to the following:
— the reference mean temperature shall be (10 ± 0,30) °C;
— thermal resistance and thermal conductivity may also be measured at mean temperatures other
than 10 °C, providing that the accuracy of the relationship between temperature and thermal
properties is well documented.
— after conditioning in accordance with 5.2.
— the declared values are to be given for a moisture content equal to that of the material when it has
reached the equilibrium with the air at 23 °C and relative humidity of 50 %, see Annex D;
— the measured values shall be expressed with three significant figures;
— for products of uniform thickness, the declared thermal resistance, R , shall always be declared.
D
The thermal conductivity, λ , shall be declared where possible. Where appropriate, for products of
D
non-uniform thickness (e.g. for sloped and tapered products) only the thermal conductivity, λ ,
D
shall be declared;
— thermal resistance and thermal conductivity shall be determined directly at measured thickness. In
the event that this is not possible, they shall be determined by measurements on other thicknesses
of the product providing that:
— the product is of similar chemical and physical characteristics and is produced on the same
production unit;
— and it can be demonstrated in accordance with EN 12939:2000 that the thermal conductivity, λ,
does not vary more than 2 % over the range of thicknesses where the calculation is applied;
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