SIST EN 14934:2008
(Main)Thermal insulation and light weight fill products for civil engineering applications - Factory made products of extruded polystyrene foam (XPS) - Specification
Thermal insulation and light weight fill products for civil engineering applications - Factory made products of extruded polystyrene foam (XPS) - Specification
This European Standard specifies the requirements for factory made products of extruded polystyrene foam which are used for frost insulation of roads, railways, trafficked areas, light weight fill for reduction of horizontal and vertical earth pressure and other civil engineering applications.
The products are manufactured in the form of boards, which are also available with special edge and surface treatment (tongue & grooves, shiplap etc.). The standard also covers multilayered insulation boards.
This standard describes product characteristics and includes procedures for testing, evaluation of conformity, marking and labelling.
The 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 classes and levels required for a given application are to be found in regulations or non-conflicting standards.
For applications where thermal resistance is required, 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) are not covered by this standard. This standard does not cover in situ insulation products and products intended to be used for insulation of buildings, of building equipment and industrial installations or products intended for acoustic insulation.
Wärmedämmung und leichte Füllprodukte für Anwendungen im Tiefbau - Werkmäßig hergestellte Produkte aus extrudiertem Polystyrolschaum (XPS) - Spezifikation
Diese Europäische Norm legt die Anforderungen für werkmäßig hergestellte Produkte aus extrudiertem Polystyrolschaum fest, die zur Dämmung gegen Frost von Straßen, Eisenbahntrassen, Verkehrsflächen, Leichtaufschüttungen für die Verringerung des horizontalen und vertikalen Erddrucks und andere Anwendungen im Tiefbau verwendet werden.
Die Produkte werden in der Form von Platten hergestellt, die auch mit speziellen Kanten- und Oberflächenbehandlungen (Nut und Feder, Überfalzung usw.) versehen sein können. Die Norm gilt auch für mehrschichtige Wärmedämmplatten.
Diese Norm beschreibt die Stoffeigenschaften und enthält die Prüfverfahren und Festlegungen für die Konformitätsbewertung, die Kennzeichnung und die Etikettierung.
Diese Norm legt keine Leistungsstufen für eine vorgegebene Eigenschaft fest, die ein Produkt erreichen muss, um für einen bestimmten Anwendungsfall tauglich zu sein. Für bestimmte Anwendungen benötigte Stufen können Regelwerken oder nicht entgegenstehenden Normen entnommen werden.
Diese Norm gilt nicht für Produkte, deren Nennwert des Wärmedurchlasswiderstandes geringer ist als 0,25 m2× K/W oder deren Nennwert der Wärmeleitfähigkeit größer ist als 0,060 W/(m×K). Produkte nach dieser Norm werden auch für die Wärmedämmung von Gebäuden nach EN 13164 verwendet.
Diese Norm gilt nicht für Produkte für an der Verwendungsstelle hergestellte Wärmedämmung oder Produkte, die zur Dämmung für die Haustechnik oder betriebstechnische Anlagen oder Produkte, die für die Schalldämmung bestimmt sind.
Produits isolants thermiques et de remblayage pour les applications de génie civil - Produits manufacturés en mousse de polystyrene extrudé (XPS) - Spécifications
La présente Norme européenne spécifie les exigences auxquelles doivent satisfaire les produits manufacturés en mousse de polystyrène extrudé utilisés pour l'isolation thermique des routes, des chemins de fer et des zones de circulation ainsi que les remblais allégés pour la réduction de la poussée verticale et horizontale des terres et autres applications du génie civil.
Les produits sont fabriqués sous forme de panneaux qui sont également disponibles avec usinage spécial de leurs chants et surfaces (tenon et mortaise, feuillure, etc.). La norme porte également sur les panneaux multicouches d'isolation.
La présente norme décrit les caractéristiques du produit et contient les procédures d'essai, d'évaluation de la conformité, de marquage et d'étiquetage.
La présente norme 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 classes et niveaux requis pour une application donnée figurent dans les réglementations, ou normes non-conflictuelles.
Pour les applications devant faire l'objet d'une résistance thermique, les produits dont la résistance thermique déclarée est inférieure à 0,25 m2K/W ou dont la conductivité thermique déclarée est supérieure à 0,060 W/(mK) ne sont pas du domaine d'application de la présente norme. Les produits d'isolation mis en œuvre in situ, ceux destinés à être utilisés pour l'isolation des bâtiments, de leurs équipements et des installations industrielles ou ceux destinés à l'isolation acoustique ne sont pas du domaine d'application de la présente norme.
Toplotnoizolacijski in lahki polnilni/nasipni proizvodi za inženirske objekte - Proizvodi iz ekstrudiranega polistirena (XPS) - Specifikacija
General Information
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Toplotnoizolacijski in lahki polnilni/nasipni proizvodi za inženirske objekte - Proizvodi iz ekstrudiranega polistirena (XPS) - SpecifikacijaWärmedämmung und leichte Füllprodukte für Anwendungen im Tiefbau - Werkmäßig hergestellte Produkte aus extrudiertem Polystyrolschaum (XPS) - SpezifikationProduits isolants thermiques et de remblayage pour les applications de génie civil - Produits manufacturés en mousse de polystyrene extrudé (XPS) - SpécificationsThermal insulation and light weight fill products for civil engineering applications - Factory made products of extruded polystyrene foam (XPS) -
Specification91.100.60Thermal and sound insulating materialsICS:Ta slovenski standard je istoveten z:EN 14934:2007SIST EN 14934:2008en01-junij-2008SIST EN 14934:2008SLOVENSKI
STANDARD
SIST EN 14934:2008
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14934September 2007ICS 83.100; 93.010 English VersionThermal insulation and light weight fill products for civilengineering applications - Factory made products of extrudedpolystyrene foam (XPS) - SpecificationProduits isolants thermiques et de remblayage pour lesapplications de génie civil - Produits manufacturés enmousse de polystyrène extrudé (XPS) - SpécificationsWärmedämmung und leichte Füllprodukte fürAnwendungen im Tiefbau - Werkmäßig hergestellteProdukte aus extrudiertem Polystyrolschaum (XPS) -SpezifikationThis European Standard was approved by CEN on 13 July 2007.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© 2007 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14934:2007: ESIST EN 14934:2008
EN 14934:2007 (E) 2 Contents Page Foreword.4 1 Scope.5 2 Normative references.5 3 Terms, definitions, symbols, units and abbreviated terms.6 3.1 Terms and definitions.6 3.2 Symbols, units and abbreviated terms.7 4 Requirements.9 4.1 General.9 4.2 For all applications.9 4.3 For specific applications.11 5 Test methods.17 5.1 Sampling.17 5.2 Conditioning.17 5.3 Testing.17 6 Designation code.20 7 Evaluation of conformity.21 8 Marking and labelling.22 Annex A (normative)
Determination of the declared values of thermal resistance and thermal conductivity.23 A.1 Introduction.23 A.2 Input data.23 A.3 Declared values.23 Annex B (normative)
Factory Production Control.25 Annex C (normative)
Determination of the aged values of thermal resistance and thermal conductivity.29 C.1 Scope.29 C.2 Procedure for XPS foam without diffusion tight laminates.29 C.3 Procedure for XPS foam for use with diffusion tight facings on both sides.30 C.4 Calculation of aged value.31 C.5 Blowing agent.32 C.6 Product grouping.32 Annex D (normative)
Determination of behaviour under cyclic square wave load.33 D.1 Scope.33 D.2 Definitions.33 D.3 Principle.34 D.4 Testing equipment.34 D.5 Test specimens.35 D.6 Procedure.35 D.7 Calculation and expression of results.37 D.8 Accuracy of measurement.38 D.9 Test report.38 Annex E (informative)
Additional properties.39 E.1 General.39 E.2 Compressive modulus of elasticity.39 E.3 Determination of volume percentage of open and closed cells.39 SIST EN 14934:2008
EN 14934:2007 (E) 3 E.4 Determination of shear strength.39 Annex ZA (informative)
Relationship between this European Standard and the Essential Requirements of EU Directive 89/106/EEC, EU Construction Products Directive.41 ZA.1 Scope and relevant characteristics.41 ZA.2 Procedures for the attestation of conformity of extruded polystyrene foam products.43 ZA.3 CE Marking and labelling.48 Bibliography.50
Figures Figure D.1 — Required load cycle during the fatigue test.35 Figure D.2 — Dimensions of the test specimen.36 Figure D.3 — Test set-up.37 Figure ZA.1 — Example CE marking information.49 Tables Table 1 — Tolerances of length, width, squareness and flatness.10 Table 2 — Classes for thickness tolerances.10 Table 3 — Levels for compressive stress at 10 % deformation or compressive strength.11 Table 4 — Levels for deformation under specified compressive load and temperature conditions.12 Table 5 — Levels for compressive stress at 2 % deformation or compressive strength.13 Table 6 — Levels for compressive stress at 5 % deformation or compressive strength.13 Table 7 — Levels for long term water absorption by total immersion.16 Table 8 — Levels for long term water absorption by diffusion.16 Table 9 — Levels for Freeze-thaw resistance.16 Table 10 — 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 %.24 Table B.1 — Minimum product testing frequencies.25 Table B.2 — Minimum product testing frequencies for the reaction to fire characteristics.27 Table E.1 — Test methods, test specimens, conditions and minimum testing frequencies.40 Table ZA.1 — Relevant clauses.42
SIST EN 14934:2008
EN 14934:2007 (E) 4 Foreword This document (EN 14934:2007) 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 March 2008, and conflicting national standards shall be withdrawn at the latest by March 2008. 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 EU Directive(s). For relationship with EU 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. 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 14934:2008
EN 14934:2007 (E) 5 1 Scope This European Standard specifies the requirements for factory made products of extruded polystyrene foam which are used for frost insulation of roads, railways, trafficked areas, light weight fill for reduction of horizontal and vertical earth pressure and other civil engineering applications. The products are manufactured in the form of boards, which are also available with special edge and surface treatment (tongue & grooves, shiplap etc.). The standard also covers multilayered insulation boards. This standard describes product characteristics and includes procedures for testing, evaluation of conformity, marking and labelling. The 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 classes and levels required for a given application are to be found in regulations or non-conflicting standards. For applications where thermal resistance is required, 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) are not covered by this standard. This standard does not cover in situ insulation products and products intended to be used for insulation of buildings, 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 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 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 SIST EN 14934:2008
EN 14934:2007 (E) 6 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 13172:2001, Thermal insulating products — Evaluation of conformity EN 13501-1, Fire classification of construction products and building elements — Part 1: Classification using test data from reaction to fire test EN 13793, Thermal insulating products for building applications — Determination of behaviour under cyclic loading EN 13823, Reaction to fire tests for building products — Building products excluding floorings exposed to 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 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 and 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 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 SIST EN 14934:2008
EN 14934:2007 (E) 7 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 Symbols and units used in this standard: b is the width mmd is the thickness mmdN is the nominal thickness of the product mmds is the thickness of test specimen mmDi is the relative compression after i number of cycles %∆εb is the relative change in width %∆εd is the relative change in thickness %∆ει is the relative change in length %εct is the compressive creep %εt is the total relative thickness reduction %εI,max is the relative maximum deformation %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 mmλ90/90 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)SIST EN 14934:2008
EN 14934:2007 (E) 8 λmean, 60d is the mean thermal conductivity of values for 60 days old foam W/(m·K)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/WR90/90, 60d is the 90 % fractile with a confidence level of 90 % for the thermal resistance of foam at 60 days m2·K/WR90/90>60d is the 90 % fractile with a confidence level of 90 % for the thermal resistance of foam older than 60 days m2·K/WRD is the declared thermal resistance m2·K/WRI is one test result of thermal resistance m2·K/WRmean is the mean thermal resistance m2·K/WSb is the deviation from squareness on length and width mm/mSmax is the deviation from flatness mm/msR is the estimate of the standard deviation of the thermal resistance m2·K/Wsλ 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 W/(m·K) within 90 days of production W/(m·K)σ2 is the compressive stress at 2 % deformation kPaσ5 is the compressive stress at 5 % deformation kPaσ10 is the compressive stress at 10 % deformation kPaσc is the declared compressive stress kPaσi is the compressive stress applied for resistance to cyclic compressive loading kPaσm is the compressive strength kPaσb is the bending strength kPaWdV is the water absorption by diffusion % by volumeWit is the long term water absorption by total immersion % by volumeWV is the water absorption by freeze-thaw after water absorption by diffusion % by volumeZ is the water vapour resistance m2·h·Pa/mg BS is the symbol of the declared level for bending strength CC(i1/i2/y) σc is the symbol of the declared level for compressive creep SIST EN 14934:2008
EN 14934:2007 (E) 9 CLR(i,z) σi is the symbol of the declared level for resistance to cyclic compressive loading with
sinus load application CLRT(i,z) σ i
is the symbol of the declared level for resistance to cyclic compressive loading with square wave load application CS(10\Y) is the symbol of the declared level for compressive stress at 10 % deformation or compressivestrength CS(5\Y) is the symbol of the declared level for compressive stress at 5 % deformation or compressive strength CS(2\Y) is the symbol of the declared level for compressive stress at 2 % deformation or compressivestrength 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 temperature andhumidity FTC is the symbol of the declared level for freeze-thaw resistance MU is the symbol of the declared level for water vapour diffusion resistance factor T is the symbol of the declared class for thickness tolerances 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 Z is the symbol of the declared value for water vapour resistance Abbreviated terms used in this standard: XPS is extruded polystyrene foam 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 E. One test result for a product property is the average of the measured values on the number of test specimens given in Table 10. 4.2 For all applications 4.2.1 Length, width, squareness, flatness Length, l, and width, b, shall be determined in accordance with EN 822, the squareness 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 declared values by more than the tolerances given in Table 1. SIST EN 14934:2008
EN 14934:2007 (E) 10 Table 1 — Tolerances of length, width, squareness and flatness Tolerances Declared length or width Length or width Squareness on length and width Flatness mm mm Sb mm/m Smax 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
4.2.2 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. Table 2 — Classes for thickness tolerances Class Tolerances mm Thickness mm T1 – 2 – 2 – 2 + 2 + 3 + 8 < 50 50 ≤ dN ≤ 120 > 120 T2 – 1,5 – 1,5 – 1,5 + 1,5 + 1,5 + 1,5 < 50 50 ≤ dN ≤ 120 > 120 T3 – 1 – 1 – 1 + 1 + 1 + 1 < 50 50 ≤ dN ≤ 120 > 120
4.2.3 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. 4.2.4 Compressive stress at 10 % deformation 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 14934:2008
EN 14934:2007 (E) 11 Table 3 — Levels for compressive stress at 10 % deformation 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) 350 ≥ 350 CS(10\Y) 400 ≥ 400 CS(10Y) 450 ≥ 450 CS(10\Y) 500 ≥ 500 CS(10\Y) 600 ≥ 600 CS(10\Y) 650 ≥ 650 CS(10\Y) 700 ≥ 700 CS(10\Y) 800 ≥ 800 CS(10\Y) 900 ≥ 900 CS(10\Y) 1000 ≥ 1000
4.2.5 Reaction to fire 4.2.5.1 Reaction to fire classification Reaction to fire classification (Euroclasses) shall be determined in accordance with EN 13501-1. 4.2.5.2 Continuous glowing combustion Where subject to regulation, the continuous glowing combustion shall be declared. In the absence of a European test method which is under development, the existing relevant national test method applies. 4.3 For specific applications 4.3.1 General If there is no requirement for a property described in 4.3 for a product in use, then the property does not need to be determined and declared by the manufacturer. 4.3.2 Dimensional stability under specified conditions 4.3.2.1 Dimensional stability at specified temperature Dimensional stability at specified temperature shall be determined in accordance with EN 1604. The test shall be carried out after storage for 48 h at (70 ± 2) °C. The relative changes in length, ∆εl, in width, ∆εb, and in thickness, ∆εd, shall not exceed 5 %. SIST EN 14934:2008
EN 14934:2007 (E) 12 4.3.2.2 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 (70 ± 2) °C and (90 ± 5) % relative humidity. The relative changes in length, ∆εl, in width, ∆εb, and in thickness, ∆εd, shall not exceed 5 %. 4.3.2.3 Deformation under specified compressive load and temperature conditions Deformation under specified compressive load and temperature conditions shall be determined in accordance with EN 1605. For the test condition the difference between the relevant deformation, ε1, after step A and, ε2, after step B as described in EN 1605 shall not exceed the value in percent given in Table 4 for the declared level. Table 4 — Levels for deformation under specified compressive load and temperature conditions Level Test conditions Requirement % DLT(2) 5 load: 40 kPa temperature: (70 ± 1) °C time: (168 ± 1) h ≤ 5
4.3.3 Compressive stress at 2 % and 5 % deformation or compressive strength The compressive stress at 2 % and/ or 5 % deformation, σ2, and/or, σ5, or the compressive strength, σm, shall be determined in accordance with EN 826. No test result for either the compressive stress at 2 % and/or 5 % deformation, σ2, and/ or, σ5, or the compressive strength, σm, whichever is the greatest, shall be lower than the values given in Table 5 and Table 6 for the declared level. NOTE Although EN 826 does not
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