Thermal insulation products for buildings - Factory made products of extruded polystyrene foam (XPS) - Specification

This European Standard specifies the requirements for factory made products of extruded polystyrene foam, with or without facings or coatings, which are used for thermal insulation of buildings. The products are manufactured in the form of boards, which are also available with special edge and surface treatment (tongue and grooves, shiplap, etc.).
This European Standard specifies product characteristics and includes procedures for testing, evaluation of conformity, marking and labelling.
Products covered by this European Standard are also used in prefabricated thermal insulating systems and composite panels; the performance of systems incorporating these products is not covered. This European Standard also covers multilayered insulation boards.
This European Standard does not specify the required level of a given property to be achieved by a product to demonstrate fitness for purpose in a particular application. The levels required for a given application are to be found in regulations or non conflicting standards.
Products with a declared thermal resistance lower than 0,25 m2K/W or a declared thermal conductivity greater than 0,060 W/(mK) at 10 C are not covered by this European Standard.
This European Standard does not cover in situ insulation products and products intended to be used for the insulation of building equipment and industrial installations or products intended for acoustic insulation.

Wärmedämmstoffe für Gebäude - Werkmäßig hergestellte Produkte aus extrudiertem Polystyrolschaum (XPS) - Spezifikation

Diese Europäische Norm legt die Anforderungen für werkmäßig hergestellte extrudierte Polystyrolschaumprodukte
mit oder ohne Kaschierung fest, die als Wärmedämmstoffe im Bauwesen verwendet werden.
Die Produkte werden in Form von Platten hergestellt. Sie sind ebenso mit besonderer Kanten- oder
Oberflächenausbildung verfügbar (Nut und Federausbildung, Stufenfalz usw.).
Diese Europäische Norm beschreibt die Stoffeigenschaften und enthält die Prüfverfahren und Festlegungen
für die Konformitätsbewertung, die Kennzeichnung und die Etikettierung.
In dieser Europäischen Norm beschriebene Produkte werden auch in vorgefertigten Wärmedämmsystemen
und Mehrschicht-Verbundplatten angewendet; die Eigenschaften von Systemen, in die diese Produkte
integriert sind, werden nicht behandelt. Diese Norm gilt auch für Produkte, die mehrlagig hergestellt werden.
Diese Europäische Norm legt keine Anforderungsniveaus für eine vorgegebene Eigenschaft fest, die ein
Produkt erreichen muss, um für einen bestimmten Anwendungsfall tauglich zu sein. Für bestimmte
Anwendungen benötigte Anforderungen können Regelwerken oder übereinstimmenden Normen entnommen
werden.
Diese Europäische Norm gilt nicht für Produkte, deren Nennwert des Wärmedurchlasswiderstandes niedriger
ist als 0,25 m2 ⋅ K/W oder deren Nennwert der Wärmeleitfähigkeit größer ist als 0,060 W/(m ⋅ K) bei 10 °C
Mitteltemperatur.
Diese Europäische Norm gilt nicht für in-situ-Dämmstoffe und für Produkte, die zur Dämmung von
haustechnischen oder betriebstechnischen Anlagen bestimmt sind, und Produkte, die zur Schalldämmung
bestimmt sind.

Produits isolants thermiques pour le bâtiment - Produits manufacturés en mousse de polystyrène extrudé (XPS) - Spécification

La présente Norme européenne spécifie les exigences auxquelles doivent satisfaire les produits manufacturés
en mousse de polystyrène extrudé, avec ou sans parements ou revêtements, utilisés pour l'isolation
thermique des bâtiments. Les produits sont fabriqués sous forme de panneaux qui sont également
disponibles avec traitement spécial de leurs chants et surfaces (tenon et mortaise, feuillure, etc.).
La présente norme européenne spécifie les caractéristiques du produit et contient les procédures d'essai,
d’évaluation de la conformité, de marquage et d'étiquetage.
Les produits du domaine d’application de la présente norme européenne sont également utilisés dans des
systèmes d’isolation thermique et dans des panneaux composites préfabriqués ; la performance des
systèmes dans lesquels entrent ces produits n’est pas définie. La norme porte également sur les panneaux
multicouches d'isolation.
La présente norme européenne ne spécifie pas, pour une propriété donnée, le niveau exigé que doit atteindre
un produit pour démontrer son aptitude à l’emploi dans une application particulière. Les niveaux requis pour
une application donnée figurent dans les réglementations, ou normes non conflictuelles.
Les produits dont la résistance thermique déclarée à une température de 10 °C est inférieure à 0,25 m2.K/W
ou dont la conductivité thermique déclarée à une température de 10 °C est supérieure à 0,060 W/(m.K) ne
sont pas du domaine d'application de la présente norme européenne.
Les produits d’isolation mis en oeuvre in situ, ceux destinés à être utilisés pour l'isolation des équipements du
bâtiment et des installations industrielles ou ceux destinés à l’isolation acoustique ne sont pas du domaine
d'application de la présente norme européenne.

Toplotnoizolacijski proizvodi za stavbe - Proizvodi iz ekstrudiranega polistirena (XPS) - Specifikacija

General Information

Status
Withdrawn
Publication Date
25-Nov-2008
Withdrawal Date
27-Nov-2012
Current Stage
9960 - Withdrawal effective - Withdrawal
Due Date
28-Nov-2012
Completion Date
28-Nov-2012

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Toplotnoizolacijski proizvodi za stavbe - Proizvodi iz ekstrudiranega polistirena (XPS) - SpecifikacijaWärmedämmstoffe für Gebäude - Werkmäßig hergestellte Produkte aus extrudiertem Polystyrolschaum (XPS) - SpezifikationProduits isolants thermiques pour le bâtiment - Produits manufacturés en mousse de polystyrène extrudé (XPS) - SpécificationThermal insulation products for buildings - Factory made products of extruded polystyrene foam (XPS) - Specification91.100.60Thermal and sound insulating materialsICS:Ta slovenski standard je istoveten z:EN 13164:2008SIST EN 13164:2009en,fr,de01-februar-2009SIST EN 13164:2009SLOVENSKI

STANDARDSIST EN 13164:2002/AC:2006SIST EN 13164:2002/A1:2004SIST EN 13164:20021DGRPHãþD

SIST EN 13164:2009

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 13164November 2008ICS 91.100.60Supersedes EN 13164:2001

English VersionThermal insulation products for buildings - Factory madeproducts of extruded polystyrene foam (XPS) - SpecificationProduits isolants thermiques pour le bâtiment - Produitsmanufacturés en mousse de polystyrène extrudé (XPS) -SpécificationWärmedämmstoffe für Gebäude - Werkmäßig hergestellteProdukte aus extrudiertem Polystyrolschaum (XPS) -SpezifikationThis European Standard was approved by CEN on 12 October 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36

B-1050 Brussels© 2008 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13164:2008: ESIST EN 13164:2009

EN 13164:2008 (E) 2 Contents Page Foreword ..............................................................................................................................................................4 1 Scope ......................................................................................................................................................6 2 Normative references ............................................................................................................................6 3 Terms, definitions, symbols, units, abbreviated terms .....................................................................7 3.1 Terms and definitions ...........................................................................................................................7 3.2 Symbols, units and abbreviated terms ................................................................................................8 4 Requirements ...................................................................................................................................... 10 4.1 General ................................................................................................................................................. 10 4.2 For all applications ............................................................................................................................. 10 4.3 For specific applications .................................................................................................................... 14 5 Test methods ....................................................................................................................................... 17 5.1 Sampling .............................................................................................................................................. 17 5.2 Conditioning ........................................................................................................................................ 17 5.3 Testing ................................................................................................................................................. 17 6 Designation code ................................................................................................................................ 19 7 Evaluation of Conformity ................................................................................................................... 19 8 Marking and labelling ......................................................................................................................... 20 Annex A (normative)

Determination of the declared values of thermal resistance and thermal conductivity ......................................................................................................................................... 21 A.1 General ................................................................................................................................................. 21 A.2 Input data ............................................................................................................................................. 21 A.3 Declared values................................................................................................................................... 21 Annex B (normative)

Factory Production Control ....................................................................................... 23 Annex C (normative)

Determination of the aged values of thermal resistance and thermal conductivity ......................................................................................................................................... 26 C.1 Scope ................................................................................................................................................... 26 C.2 Procedure for XPS foam without diffusion tight laminates ............................................................ 26 C.3 Procedure for XPS foam for use with diffusion tight facings on both sides ................................ 27 C.4 Calculation of aged value .................................................................................................................. 28 C.5 Blowing agent ..................................................................................................................................... 29 C.6 Product grouping ................................................................................................................................ 29 Annex D (informative)

Additional Properties ............................................................................................... 30 D.1 General ................................................................................................................................................. 30 D.2 Behaviour under cyclic loading ........................................................................................................ 30 D.3 Compressive modulus of elasticity .................................................................................................. 30 D.4 Bending strength ................................................................................................................................ 30 D.5 Shear strength ..................................................................................................................................... 30 D.6 Determination of volume percentage of closed cells ..................................................................... 31 Annex E (informative)

Plan for cutting test specimen ................................................................................ 32 Annex ZA (informative)

Clauses of this European Standard addressing the provisions of the EU Construction Products Directive................................................................................................. 34 ZA.1 Scope and relevant characteristics .................................................................................................. 34 ZA.2 Procedures for attestation of conformity of extruded polystyrene foam products ..................... 36 ZA.3 CE Marking and labelling ................................................................................................................... 40 SIST EN 13164:2009

EN 13164:2008 (E) 3 Bibliography ...................................................................................................................................................... 42

Tables Table 1 — Tolerances of length, width, squareness and flatness ............................................................... 11 Table 2 — Classes for thickness tolerances ................................................................................................. 12 Table 3 — Levels for compressive stress or compressive strength........................................................... 13 Table 4 — Levels for deformation under specified compressive load and temperature conditions ....... 14 Table 5 — Levels for tensile strength, perpendicular to faces .................................................................... 15 Table 6 — Levels for long term water absorption by total immersion ........................................................ 16 Table 7 — Levels for long term water absorption by diffusion ................................................................... 16 Table 8 — Levels for freeze thaw resistance ................................................................................................. 16 Table 9 — Test methods, test specimens and conditions ........................................................................... 18 Table A.1 — Values of k for one sided 90 % tolerance interval with a confidence level of 90 % ............. 22 Table B.1 — Minimum product testing frequencies...................................................................................... 23 Table B.2 — Minimum product testing frequencies for the reaction to fire characteristics .................... 24 Table D.1 — Test methods, test specimens, conditions and minimum testing frequencies ................... 31 Table ZA.1 — Relevant clauses for Extruded polystyrene foam and intended use .................................... 35 Table ZA.2 — Systems of attestation of conformity ..................................................................................... 36 Table ZA.3 — Assignment of evaluation of conformity tasks for products under system 1 ................... 37 Table ZA.4 — Assignment of evaluation of conformity tasks for products under system 3 or system 3 combined with system 4 for reaction to fire .................................................................... 38

SIST EN 13164:2009

EN 13164:2008 (E) 4 Foreword This document (EN 13164:2008) 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 2009, and conflicting national standards shall be withdrawn at the latest by May 2009. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EC Directive(s). For relationship with EC Directive(s), see informative Annex ZA, which is an integral part of this document. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 13164:2001.

This document is one of a series of standards for insulating products used in buildings, but this standard may be used in other areas where appropriate. In pursuance of resolution BT 20/1993 revised, CEN/TC 88 have proposed defining the standards listed below as a package of documents. The package of standards comprises the following group of interrelated standards for the specifications of factory made thermal insulation products; all of which come within the scope of CEN/TC88: EN 13162, Thermal insulation products for buildings — Factory made mineral wool (MW) products — Specification EN 13163, Thermal insulation products for buildings — Factory made products of expanded polystyrene (EPS) — Specification EN 13164, Thermal insulation products for buildings — Factory made products of extruded polystyrene foam (XPS) — Specification EN 13165, Thermal insulation products for buildings — Factory made rigid polyurethane foam (PUR) products — Specification EN 13166, Thermal insulation products for buildings — Factory made products of phenolic foam (PF) — Specification EN 13167, Thermal insulation products for buildings — Factory made cellular glass (CG) products — Specification EN 13168, Thermal insulation products for buildings — Factory made wood wool (WW) products — Specification EN 13169, Thermal insulation products for buildings — Factory made products of expanded perlite (EPB) — Specification EN 13170, Thermal insulation products for buildings — Factory made products of expanded cork (ICB) — Specification SIST EN 13164:2009

EN 13164:2008 (E) 5 EN 13171, Thermal insulation products for buildings — Factory made wood fibre (WF) products — Specification According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. SIST EN 13164:2009

EN 13164:2008 (E) 6 1 Scope This European Standard specifies the requirements for factory made products of extruded polystyrene foam, with or without facings or coatings, which are used for thermal insulation of buildings. The products are manufactured in the form of boards, which are also available with special edge and surface treatment (tongue and grooves, shiplap, etc.). This European Standard specifies product characteristics and includes procedures for testing, evaluation of conformity, marking and labelling. Products covered by this European Standard are also used in prefabricated thermal insulating systems and composite panels; the performance of systems incorporating these products is not covered. This European Standard also covers multilayered insulation boards. This European Standard does not specify the required level of a given property to be achieved by a product to demonstrate fitness for purpose in a particular application. The levels required for a given application are to be found in regulations or non-conflicting standards. Products with a declared thermal resistance lower than 0,25 m2⋅K/W or a declared thermal conductivity greater than 0,060 W/(m⋅K) at 10 °C are not covered by this European Standard. This European Standard does not cover in situ insulation products and products intended to be used for the insulation of building equipment and industrial installations or products intended for acoustic insulation. 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 822, Thermal insulating products for building applications — Determination of length and width EN 823, Thermal insulating products for building applications — Determination of thickness EN 824, Thermal insulating products for building applications — Determination of squareness EN 825, Thermal insulating products for building applications — Determination of flatness EN 826, Thermal insulating products for building applications — Determination of compression behaviour EN 1604, Thermal insulating products for building applications — Determination of dimensional stability under specified temperature and humidity conditions EN 1605, Thermal insulating products for building applications — Determination of deformation under specified compressive load and temperature conditions EN 1606, Thermal insulating products for building applications — Determination of compressive creep EN 1607, Thermal insulating products for building applications — Determination of tensile strength perpendicular to faces EN 12086:1997, Thermal insulating products for building applications — Determination of water vapour transmission properties EN 12087, Thermal insulating products for building applications — Determination of long term water absorption by immersion SIST EN 13164:2009

EN 13164:2008 (E) 7 EN 12088, Thermal insulating products for building applications — Determination of long term water absorption by diffusion EN 12089, Thermal insulating products for building applications — Determination of bending behaviour

EN 12090, Thermal insulating products for building applications — Determination of shear behaviour

EN 12091, Thermal insulating products for building applications — Determination of freeze-thaw resistance EN 12667, 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 EN 12939, 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 13172:2008, Thermal insulating products — Evaluation of conformity EN 13501-1, Fire classification of construction products and building elements — Part 1: Classification using data from reaction to fire test EN 13793, Thermal insulating products for building applications - Determination of behaviour under cyclic loading

EN 13820, Thermal insulating materials for building applications — Determination of organic content EN 13823, Reaction to fire tests for building products — Building products excluding floorings exposed to the thermal attack by a single burning item EN ISO 1182, Reaction to fire tests for building products — Non-combustibility test (ISO 1182:2002) EN ISO 1716, Reaction to fire tests for building products — Determination of the heat of combustion (ISO 1716:2002)

EN ISO 4590, Rigid cellular plastics - Determination of the volume percentage of open cells and closed cells (ISO 4590:2002) EN ISO 9229:2007, Thermal insulation — Vocabulary (ISO 9229:2007)

EN ISO 11925-2, Reaction to fire tests — Ignitability of building products subjected to direct impingement of flame – Part 2:Single-flame source test (ISO 11925-2:2002) ISO 12491, Statistical methods for quality control of building materials and components 3 Terms, definitions, symbols, units, abbreviated terms 3.1 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1.1 Terms and definitions as given in EN ISO 9229:2007 3.1.1.1 extruded polystyrene foam rigid cellular plastics insulation material expanded and extruded with or without a skin, from polystyrene or one of its copolymers and which has a closed cell structure SIST EN 13164:2009

EN 13164:2008 (E) 8 3.1.1.2 board 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 3.1.2 Additional definitions 3.1.2.1 level given value which is the upper or lower limit of a requirement; the level is given by the declared value of the characteristic concerned 3.1.2.2 class combination of two levels of the same property between which the performance shall fall 3.2 Symbols, units and abbreviated terms 3.2.1 Symbols and units used in this standard b is the width mm d is the thickness mm dN is the nominal thickness of the product mm dS is the thickness of test specimen mm ∆εb is the relative change in width % ∆εd is the relative change in thickness % ∆εl is the relative change in length % εct is the compressive creep % εt is the total relative thickness reduction % ε1 is the relative deformation after step A % ε2 is the relative deformation after step B % k is a factor related to the number of test results available – l is the length mm λ90/90 is the 90 % fractile with a confidence level of 90 % for the thermal conductivity W/(m⋅K) λ90/90,60d is the 90 % fractile with a confidence level of 90 % for the thermal conductivity of foam at 60 days W/(m⋅K) λ90/90>60d is the 90 % fractile with a confidence level of 90 % for the thermal conductivity of foam older than 60 days W/(m⋅K) λD is the declared thermal conductivity W/(m⋅K) λI is one test result of thermal conductivity W/(m⋅K) λmean is the mean thermal conductivity W/(m⋅K) λmean, a is the mean thermal conductivity of aged values W/(m⋅K) λmean,60d is the mean thermal conductivity of values for 60 days old foam W/(m⋅K) SIST EN 13164:2009

EN 13164:2008 (E) 9 λ>60d is the measured value of the thermal conductivity of foam older than 60 days W/(m⋅K) µ is the water vapour diffusion resistance factor – n is the number of test results – R90/90 is the 90 % fractile with a confidence level of 90 % for the thermal resistance m2⋅K/W R90/90,60d is the 90 % fractile with a confidence level of 90 % for the thermal resistance of foam at 60 days m2⋅K/W R90/90>60d is the 90 % fractile with a confidence level of 90 % for the thermal resistance of foam older than 60 days m2⋅K/W RD is the declared thermal resistance m2⋅K/W RI is one test result of thermal resistance m2⋅K/W Rmean is the mean thermal resistance m2⋅K/W Sb is the deviation from squareness on width or length mm/m Smax is the deviation from flatness mm sR is the estimate of the standard deviation of the thermal resistance m2⋅K/W sλ is the estimate of the standard deviation of the thermal conductivity W/(m⋅K) sλa is the estimate of the standard deviation of the aged thermal conductivity W/(m⋅K) sλi is the estimate of the standard deviation of the initial thermal conductivity within 90 days of production W/(m⋅K) σ10 is the compressive stress at 10 % deformation kPa σc is the declared compressive stress kPa σm is the compressive strength kPa σmt is the tensile strength perpendicular to faces kPa WdV is the water absorption by diffusion % Wlt is the long term water pick up by total immersion % WV is the water absorption by diffusion and by freeze-thaw % Z is the water vapour resistance m2⋅h⋅Pa/mg CC(i1/i2/y)σc is the symbol of the declared level for compressive creep* CS(10\Y)x is the symbol of the declared level for compressive stress or strength DLT(1)5 is the symbol of the declared level of deformation under specified compressive load andtemperature at conditions set 1 with a maximum of 5 % deformation DLT(2)5 is the symbol of the declared level of deformation under specified compressive load andtemperature at conditions set 2 with a maximum of 5 % deformation DS(T+) is the symbol of the declared value for dimensional stability at specified temperature DS(TH) is the symbol of the declared value for dimensional stability under specified temperatureand humidity FT is the symbol of the declared level for freeze thaw resistance MUi is the symbol of the declared level for water vapour diffusion resistance factor* SIST EN 13164:2009

EN 13164:2008 (E) 10 Ti is the symbol of the declared class for thickness tolerances* TRi is the symbol of the declared level for tensile strength perpendicular to faces* WD(V) is the symbol of the declared level for water absorption by diffusion WL(T) is the symbol of the declared level for long term water absorption by total immersion Zi is the symbol of the declared value for water vapour resistance* * "i" is the relevant class or level, "σc" is the compressive stress, and "y" is the number of years. 3.2.2 Abbreviated terms used in this standard XPS eXtruded PolyStyrene foam ITT

Initial Type Testing RtF

Resistance to Fire FPC Factory Production Control 4 Requirements 4.1 General Product properties shall be assessed in accordance with Clause 5. To comply with this standard, products shall meet the requirements of 4.2, and the requirements of 4.3 as appropriate. NOTE Information on additional properties is given in Annex D. One test result for a product property is the average of the measured values on the number of test specimens given in Table 9. 4.2 For all applications 4.2.1 Thermal resistance and thermal conductivity The thermal resistance and thermal conductivity shall be based upon measurements carried out in accordance with EN 12667 or EN 12939 for thick products. The thermal resistance and thermal conductivity shall be determined in accordance with Annex A and Annex C and declared by the manufacturer according to the following:  the reference mean temperature shall be 10 °C;  the measured values shall be expressed with three significant figures;  for products of uniform thickness, the thermal resistance, RD, shall always be declared. The thermal conductivity, λD, shall be declared where possible. Where appropriate, for products of non-uniform thickness (e.g. for sloped and tapered products) only the thermal conductivity, λD, shall be declared.  the declared thermal resistance, RD, and the declared thermal conductivity, λD, shall be given as limit values representing at least 90 % of the production, determined with a confidence level of 90 %;  the value of thermal conductivity, λ90/90, shall be rounded upwards to the nearest 0,001 W/(m⋅K) and declared as λD in levels with steps of 0,001 W/(m⋅K); SIST EN 13164:2009

EN 13164:2008 (E) 11  the declared thermal resistance, RD, shall be calculated from the nominal thickness, dN, and the corresponding declared thermal conductivity value, λ90/90;  the value of thermal resistance, R90/90, when calculated from the nominal thickness, dN, and the corresponding thermal conductivity, λ90/90, shall be rounded downwards to the nearest 0,05 m2⋅K/W, and declared as RD in levels with steps of 0,05 m2⋅K/W;  the value of R90/90 for those products for which only the thermal resistance is measured directly, shall be rounded downwards to the nearest 0,05 m2⋅K/W and declared as RD in levels with steps of 0,05 m2⋅K/W. 4.2.2 Length, width, squareness, flatness Length, l, and width, b, shall be determined in accordance with EN 822, the squarenesses on length and width, Sb, in accordance with EN 824, and the flatness, Smax, in accordance with EN 825. No test result shall deviate from the nominal values by more than the tolerances given in Table 1. Table 1 — Tolerances of length, width, squareness and flatness Nominal length or width Tolerances Length or width Squareness on length and width Flatness

Sb Smax mm mm mm/m mm less than 1 000 ± 8 5 7,0 1 000 to 2 000 ± 10 5 14,0 > 2 000 to 4 000 ± 10 5 28,0 > 4 000 ± 10 5 35,0

4.2.3 Thickness Thickness, d, shall be determined in accordance with EN 823. No test result shall deviate from the nominal thickness, dN, by more than the tolerances given in Table 2 for the labelled class. SIST EN 13164:2009

EN 13164:2008 (E) 12

Table 2 — Classes for thickness tolerances Class Tolerances Thickness mm mm T1 – 2 + 2 < 50 – 2 + 3 50 ≤ dN ≤ 120 – 2 + 8 > 120 T2 – 1,5 + 1,5 < 50 – 1,5 + 1,5 50 ≤ dN ≤ 120 – 1,5 + 1,5 > 120 T3 – 1 + 1 < 50 – 1 + 1 50 ≤ dN ≤ 120 – 1 + 1 > 120

4.2.4 Dimensional stability under specified temperature and humidity conditions Dimensional stability under specified temperature and humidity conditions shall be determined in accordance with EN 1604. The test shall be carried out after storage for 48 h at (23 ± 2) °C and (90 ± 5) % relative humidity. The relative changes in length, ∆εl, in width, ∆εb, and in thickness, ∆εd, shall not exceed 2 %. This test shall not be performed when the more severe test, described in 4.3.2.2 is used. 4.2.5 Compressive stress or compressive strength The compressive stress at 10 % deformation, σ10, or the compressive strength, σm, shall be determined in accordance with EN 826. No test result for either the compressive stress at 10 % deformation, σ10, or the compressive strength, σm, whichever is the greatest, shall be lower than the values given in Table 3 for the declared level. SIST EN 13164:2009

EN 13164:2008 (E) 13

Table 3 — Levels for compressive stress or compressive strength Level Requirement kPa CS(10\Y)100 > 100 CS(10\Y)200 ≥ 200 CS(10\Y)250 ≥ 250 CS(10\Y)300 ≥ 300 CS(10\Y)400 ≥ 400 CS(10\Y)500 ≥ 500 CS(10\Y)600 ≥ 600 CS(10\Y)700 ≥ 700 CS(10\Y)800 ≥ 800 CS(10\Y)1000 ≥ 1000

4.2.6 Reaction to fire Reaction to fire classification (Euroclasses) shall be determined in accordance with EN 13501-1. 4.2.7 Durability characteristics 4.2.7.1 General The appropriate durability characteristics have been considered and are covered in 4.2.7.2, 4.2.7.3 and 4.2.7.4. 4.2.7.2 Durability of reaction to fire against ageing/degradation The reaction to fire performance of XPS products does not change with time. 4.2.7.3 Durability of thermal resistance and

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