Flexible sheets for waterproofing - Reinforced bitumen sheets for roof waterproofing - Definitions and characteristics

This European Standard specifies definitions and characteristics for flexible reinforced bitumen sheets for which the intended use is roofing. This covers sheets used as top layers, intermediate layers and underlayers. It does not cover reinforced bitumen sheets for waterproofing used as underlays for discontinuous roofing. It does not cover waterproofing sheets which are intended to be used fully bonded under bituminous products (e.g. asphalt) directly applied at high temperature, specified by EN 14695.

Abdichtungsbahnen - Bitumenbahnen mit Trägereinlage für Dachabdichtungen - Definitionen und Eigenschaften

Diese Europäische Norm legt die Definitionen und Eigenschaften von Bitumenbahnen mit Trägereinlagen fest, die für Dachabdichtungen vorgesehen sind. Dies beinhaltet Bahnen, die als Oberlagen, Zwischenlagen und Unterlagen verwendet werden. Bitumenbahnen mit Trägereinlage, die als Unterdeck- und Unterspannbahnen zur Abdichtung von Dachdeckungen verwendet werden, werden in dieser Europäischen Norm nicht behandelt.
Abdichtungsbahnen, die vollständig verklebt unter bei hohen Temperaturen aufgebrachten Bitumenprodukten (z. B. Asphalt) verwendet werden sollen, wie in EN 14695 festgelegt, sind nicht Gegenstand dieser Europäischen Norm.

Feuilles souples d'étanchéité - Feuilles bitumineuses armées pour l'étanchéité de toiture - Définitions et caractéristiques

La présente Norme européenne spécifie les définitions et les caractéristiques pour les feuilles bitumineuses souples armées, dont l'utilisation prévue est l'étanchéité de toiture. Ceci concerne des feuilles utilisées comme dernière couche, couche intermédiaire ou couche inférieure. Cette norme ne concerne pas les feuilles bitumineuses d’étanchéité armées, utilisées comme sous-couche ou écran de sous-toiture.
Elle ne traite pas des feuilles d'étanchéité qui sont destinées à être posées en adhérence totale sous protection de surface en produits bitumineux (par exemple l'asphalte) directement mises en œuvre à température élevée, spécifiées dans l'EN 14695.

Hidroizolacijski trakovi - Ojačeni bitumenski trakovi za tesnjenje streh - Definicije in lastnosti

Ta evropski standard določa definicije in lastnosti za ojačene bitumenske trakove, ki so namenjeni za kritje strehe. Ti trakovi za prekrivanje se uporabljajo kot zgornji sloj, kot sloj med plastmi in kot spodnji sloj. Ta standard ne obravnava ojačenih hidroizolacijskih bitumenskih trakov kot podložne (sekundarne) kritine poševnih streh. Standard ne obravnava hidroizolacijskih trakov, ki so predvideni za pritrjevanje po celotni površini pod bitumenskimi proizvodi (kot je asfalt) ter se vgrajujejo pri visoki temperaturi in so opredeljeni v standardu EN 14695.

General Information

Status
Published
Public Enquiry End Date
19-Aug-2012
Publication Date
19-Nov-2013
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
26-Sep-2013
Due Date
01-Dec-2013
Completion Date
20-Nov-2013

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Abdichtungsbahnen - Bitumenbahnen mit Trägereinlage für Dachabdichtungen - Definitionen und EigenschaftenFeuilles souples d'étanchéité - Feuilles bitumineuses armées pour l'étanchéité de toiture - Définitions et caractéristiquesFlexible sheets for waterproofing - Reinforced bitumen sheets for roof waterproofing - Definitions and characteristics91.100.50Veziva. Tesnilni materialiBinders. Sealing materials91.060.20StreheRoofs01.040.91Gradbeni materiali in gradnja (Slovarji)Construction materials and building (Vocabularies)ICS:Ta slovenski standard je istoveten z:EN 13707:2013SIST EN 13707:2013en,fr,de01-december-2013SIST EN 13707:2013SLOVENSKI

STANDARDSIST EN 13707:2005+A2:20091DGRPHãþD
SIST EN 13707:2013
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 13707

October 2013 ICS 91.100.50; 01.040.91 Supersedes EN 13707:2004+A2:2009English Version

Flexible sheets for waterproofing - Reinforced bitumen sheets for roof waterproofing - Definitions and characteristics

Feuilles souples d'étanchéité - Feuilles bitumineuses armées pour l'étanchéité de toiture - Définitions et caractéristiques

Abdichtungsbahnen - Bitumenbahnen mit Trägereinlage für Dachabdichtungen - Definitionen und Eigenschaften This European Standard was approved by CEN on 12 November 2012.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, 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:
Avenue Marnix 17,

B-1000 Brussels © 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13707:2013: ESIST EN 13707:2013

EN 13707:2013 (E) 2 Contents

Page Foreword ................................................................................................................................................................. 4 1 Scope ......................................................................................................................................................... 5 2 Normative references ............................................................................................................................... 5 3 Terms and definitions .............................................................................................................................. 6 4 System-related characteristics ................................................................................................................ 8 5 Product characteristics ............................................................................................................................ 8 5.1 General ....................................................................................................................................................... 8 5.2 Characteristics .......................................................................................................................................... 8 5.2.1 Visible defects ........................................................................................................................................... 8 5.2.2 Dimensions, tolerances and mass per unit area ................................................................................... 8 5.2.3 Watertightness .......................................................................................................................................... 8 5.2.4 Effects of water ......................................................................................................................................... 8 5.2.5 Fire performance....................................................................................................................................... 9 5.2.6 Resistance to hail ..................................................................................................................................... 9 5.2.7 Watertightness after stretching at low temperature ............................................................................. 9 5.2.8 Joint strength .......................................................................................................................................... 10 5.2.9 Water vapour properties ........................................................................................................................ 10 5.2.10 Tensile properties ................................................................................................................................... 10 5.2.11 Resistance to impact .............................................................................................................................. 10 5.2.12 Resistance to static loading .................................................................................................................. 10 5.2.13 Resistance to tearing (nail shank) ........................................................................................................ 10 5.2.14 Resistance to root penetration .............................................................................................................. 10 5.2.15 Dimensional stability .............................................................................................................................. 10 5.2.16 Form stability under cyclic temperature change ................................................................................. 10 5.2.17 Flexibility at low temperature (pliability) .............................................................................................. 11 5.2.18 Flow resistance at elevated temperature ............................................................................................. 11 5.2.19 Artificial ageing behaviour ..................................................................................................................... 11 5.2.20 Adhesion of granules ............................................................................................................................. 12 5.3 Dangerous substances .......................................................................................................................... 12 6 Evaluation of conformity ........................................................................................................................ 12 6.1 General ..................................................................................................................................................... 12 6.2 Initial Type Testing – Type Testing ....................................................................................................... 12 6.2.1 General ..................................................................................................................................................... 12 6.2.2 Test reports ............................................................................................................................................. 13 6.3 Factory production control (FPC) ......................................................................................................... 13 6.3.1 General ..................................................................................................................................................... 13 6.3.2 Requirements .......................................................................................................................................... 14 6.3.3 Product specific requirements .............................................................................................................. 15 6.3.4 Initial inspection of factory and of FPC ................................................................................................ 16 6.3.5 Continuous surveillance of FPC ........................................................................................................... 17 6.3.6 Procedure for modifications .................................................................................................................. 17 7 Product data sheet.................................................................................................................................. 17 8 Marking, labelling and packaging ......................................................................................................... 18 Annex A (normative)

Applicability of characteristics ....................................................................................... 19 Annex B (normative)

Frequencies of testing for factory production control ................................................ 20 Annex C (informative)

Information about chemical resistance ....................................................................... 21 Annex D (informative)

Example of a product data sheet  General information ......................................... 23 SIST EN 13707:2013

EN 13707:2013 (E) 3 Annex E (informative)

Wind-uplift properties of mechanically fixed bituminous membranes  General information ............................................................................................................................... 25 Annex ZA (informative)

Clauses of this European Standard addressing essential requirements or other provisions of EU Directives ......................................................................................................... 26 ZA.1 Scope and relevant characteristics ...................................................................................................... 26 ZA.2 Procedure for attestation of conformity of the bitumen sheets ........................................................ 28 ZA.2.1 Systems of attestation of conformity ................................................................................................... 28 ZA.2.2 EC Certificate and Declaration of conformity ...................................................................................... 34 ZA.3 CE marking and labelling....................................................................................................................... 36 Bibliography ......................................................................................................................................................... 39

SIST EN 13707:2013

EN 13707:2013 (E) 4 Foreword This document (EN 13707:2013) has been prepared by Technical Committee CEN/TC 254 “Flexible sheets for waterproofing”, the secretariat of which is held by NEN. 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 April 2014, and conflicting national standards shall be withdrawn at the latest by April 2014. 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 13707:2004+A2:2009. 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 EU Directive(s). For relationship with EU Directive(s), 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 13707:2013

EN 13707:2013 (E) 5 1 Scope

This European Standard specifies definitions and characteristics for flexible reinforced bitumen sheets for which the intended use is roofing. This covers sheets used as top layers, intermediate layers and underlayers. It does not cover reinforced bitumen sheets for waterproofing used as underlays for discontinuous roofing. This European Standard does not cover waterproofing sheets which are intended to be used fully bonded under bituminous products (e.g. asphalt) directly applied at high temperature, specified by EN 14695. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1107-1, Flexible sheets for waterproofing — Part 1: Bitumen sheets for roof waterproofing — Determination of dimensional stability EN 1108, Flexible sheets for waterproofing — Bitumen sheets for roof waterproofing — Determination of form stability under cyclical temperature changes EN 1109, Flexible sheets for waterproofing — Bitumen sheets for roof waterproofing — Determination of flexibility at low temperature EN 1110, Flexible sheets for waterproofing — Bitumen sheets for roof waterproofing — Determination of flow resistance at elevated temperature EN 1296, Flexible sheets for waterproofing — Bitumen, plastic and rubber sheets for roofing — Method of artificial ageing by long term exposure to elevated temperature EN 1297, Flexible sheets for waterproofing — Bitumen, plastic and rubber sheets for roof waterproofing — Method of artificial ageing by long term exposure to the combination of UV radiation, elevated temperature and water EN 1848-1, Flexible sheets for waterproofing — Determination of length, width and straightness — Part 1: Bitumen sheets for roof waterproofing EN 1849-1, Flexible sheets for waterproofing — Determination of thickness and mass per unit area — Part 1: Bitumen sheets for roof waterproofing EN 1850-1, Flexible sheets for waterproofing — Determination of visible defects — Part 1: Bitumen sheets for roof waterproofing EN 1928:2000, Flexible sheets for waterproofing — Bitumen, plastic and rubber sheets for roof waterproofing — Determination of watertightness EN 12039, Flexible sheets for waterproofing — Bitumen sheets for roof waterproofing — Determination of adhesion of granules EN 12310-1, Flexible sheets for waterproofing — Part 1: Bitumen sheets for waterproofing — Determination of resistance to tearing (nail shank) EN 12311-1, Flexible sheets for waterproofing — Part 1: Bitumen sheets for roof waterproofing — Determination of tensile properties EN 12316-1, Flexible sheets for waterproofing — Part 1: Bitumen sheets for roof waterproofing — Determination of peel resistance of joints SIST EN 13707:2013

EN 13707:2013 (E) 6 EN 12317-1, Flexible sheets for waterproofing — Part 1: Bitumen sheets for roof waterproofing — Determination of shear resistance of joints EN 12691:2006, Flexible sheets for waterproofing — Bitumen, plastic and rubber sheets for roof waterproofing — Determination of resistance to impact EN 12730:2001, Flexible sheets for waterproofing — Bitumen, plastic and rubber sheets for roof waterproofing — Determination of resistance to static loading EN 13416:2001, Flexible sheets for waterproofing — Bitumen, plastic and rubber sheets for roof waterproofing — Rules for sampling EN 13501-1:2007+A1:2009, Fire classification of construction products and building elements — Part 1: Classification using test data from reaction to fire tests EN 13501-5, Fire classification of construction products and building elements — Part 5: Classification using data from external fire exposure to roofs tests EN 13897, Flexible sheets for waterproofing — Bitumen, plastic and rubber sheets for roof waterproofing — Determination of watertightness after stretching at low temperature EN 13948, Flexible sheets for waterproofing — Bitumen, plastic and rubber sheets for roof waterproofing — Determination of resistance to root penetration EN ISO 11925-2, Reaction to fire tests — Ignitability of products subjected to direct impingement of flame — Part 2: Single-flame source test (ISO 11925-2) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 13416:2001 and the following apply. 3.1 waterproofing action to prevent the passage of water from one plane to another 3.2 waterproofing system assembly of one or more layers of roofing sheet in its applied and jointed form, which has certain performance characteristics, to be assessed as a whole Note 1 to entry: Where only one layer is used this is usually referred to as a single layer system. Note 2 to entry: A bituminous roofing system is formed on site by connecting and sealing one or more superimposed layers of bitumen sheets to form a single composite waterproof layer for use over flat, pitched or vertical surfaces according to building application requirements. 3.3 roofing waterproofing used in the roof of a building including roofs used for parking of vehicles and for roof gardens Note 1 to entry: Waterproofing sheets which are intended to be fully bonded and bituminous products directly applied at high temperature are specified by the European Standard on flexible reinforced bitumen sheets for concrete bridge decks and other concrete surfaces trafficable by vehicles (see EN 14695 [8]). 3.4 roofing sheet factory made flexible sheet including any carriers, facings, surface texture and/or backing SIST EN 13707:2013

EN 13707:2013 (E) 7 3.5 carrier material incorporated into or onto the factory-made roofing sheet to ensure its stability and/or mechanical resistance 3.6 backing material incorporated onto the factory-made roofing sheet without a permanent mechanical function 3.7 surfacing material applied on one or both sides of roofing sheets, either as a permanent light surface protection against weathering on the upper surface or as an anti-sticking substance of the roofing sheets 3.8 batch

amount of product manufactured to the same specification within a maximum period of 24 h 3.9 manufacturer's limiting value

MLV value which is stated by the manufacturer to be met during testing and which can be a minimum or a maximum value according to statements made under product characteristics of this document 3.10 manufacturer's declared value

MDV value declared by the manufacturer accompanied by a declared tolerance 3.11 reinforced bitumen sheet factory made flexible layer of bitumen with internal or external incorporation of one or more carriers, supplied in roll form ready for use 3.12 oxidised bitumen straight run petroleum bitumen or a fluxed bitumen which has been hardened and rendered less temperature susceptible by blowing with air at high temperature with or without the use of a catalyst 3.13 elastomeric bitumen petroleum bitumen and/or oxidised bitumen modified by the addition of thermo-plastic rubbers 3.14 plastomeric bitumen petroleum bitumen and/or oxidised bitumen modified by the addition of polyolefin or polyolefin copolymer compound 3.15 sampling procedure used to select or constitute a sample 3.16 sample sheet from which a test piece is taken 3.17 test piece part of the sample from which test specimens are taken SIST EN 13707:2013

EN 13707:2013 (E) 8 3.18 test specimen piece of precise dimensions taken from the test piece 4 System-related characteristics System-related characteristics with respect to multilayer systems, sheets for single layer application, mechanically fastened systems (see Annex E) and roof gardens or under heavy protection are given in Annex A. 5 Product characteristics 5.1 General 5.1.1 Where a tolerance is limited by this standard, it does not have to be declared by the manufacturer. 5.1.2 When tested for purposes other than initial type testing or factory production control, the tests to determine product characteristics indicated in this standard shall be started within one month of delivery from the manufacturer. 5.2 Characteristics 5.2.1 Visible defects The product shall be free of visible defects, as determined in accordance with EN 1850-1. 5.2.2 Dimensions, tolerances and mass per unit area The length, width and straightness of the sheet shall be determined in accordance with EN 1848-1. The length and width shall not be shorter than the manufacturer's limiting value. The maximum deviation from straightness shall not exceed 20 mm per 10 m length or in proportion for other lengths (e.g. 10 mm per 5 m length). Where a product is specified by mass per unit area, it shall be measured in accordance with EN 1849-1, except that the sample shall be 100 mm × 100 mm, and the results shall lie within the declared tolerance of the manufacturer's declared value. Where a product is specified by thickness, it shall be measured in accordance with EN 1849-1 and the results shall lie within the declared tolerance of the manufacturer's declared value. Where sheets with incorporated mineral protection are specified by thickness, the measurement of thickness may be carried out on the granule-free selvedge. This shall be declared in the report. 5.2.3 Watertightness The watertightness shall be determined in accordance with EN 1928:2000 using method A or B at an applied water pressure of 10 kPa (0,1 bar) and shall give a pass result. 5.2.4 Effects of water Not specified. NOTE Experience has shown that water has little or no effect upon the in-service performance of reinforced bitumen sheets. See also Annex C. SIST EN 13707:2013

EN 13707:2013 (E) 9 5.2.5 Fire performance 5.2.5.1 External fire performance The classification of the product in accordance with EN 13501-5 is limited to class FROOF, (t1, t2, t3, t4). NOTE The external fire performance of a roof is dominated by the built up system.

5.2.5.2 Reaction to fire Where required, the product shall be tested and classified in accordance with EN 13501-1:2007+A1:2009, Table 1. When tested according to EN ISO 11925-2, the products shall be tested under conditions of surface flame attack. NOTE It is currently considered that the Euroclasses Classification system at Classes D and above requires investigation to determine its appropriateness to the products covered by this document (the SBI test may be inappropriate for products covered by the standard). Pending results of such an investigation and discussions in the Fire Regulators Group, products covered by this document are tested to EN ISO 11925-2. If and when a new fire test scenario and test method are developed for the products, this document will be amended to refer to them.

Reaction to fire is by definition a product test, as distinct from Resistance to fire, which is a system test. Therefore, it is considered important to provide guidance in order to reduce the number of tests required. According to EN ISO 11925-2, the test is required to be undertaken on the exposed surface without any substrate, in one direction only, and the reinforcement has to be stated by the manufacturer as “organic” or “inorganic”. a) Test results from EN ISO 11925-2 for a product with a given reinforcement and a bituminous compound having a certain percentage of organic content shall apply to the same product having a lower organic content. b) Test results from EN ISO 11925-2 for a product with a given organic reinforcement and a bituminous compound shall apply to a product having the same bituminous compound and an inorganic reinforcement. c) Test results from EN ISO 11925-2 for a product with a given reinforcement and bituminous compound, with a thickness of above 2 mm or a mass per unit area of above 2 kg/m², shall apply to any product with the same type of reinforcement and the same type of bituminous compound but lower thickness or mass per unit area, down to a limit of 2 mm or 2 kg/m² respectively. d) Test results from EN ISO 11925-2 for a product with a given reinforcement and bituminous compound with a thickness or mass per unit area below 2 mm or 2kg/m², shall apply to any product with the same type of reinforcement and the same type of bituminous compound but with higher thickness or mass per unit area, up to a limit of 2 mm or 2 kg/m² respectively. 5.2.6 Resistance to hail Not specified. NOTE Experience has shown that hail has little or no effect upon the in-service performance of reinforced bitumen sheets. 5.2.7 Watertightness after stretching at low temperature Where required, the watertightness after stretching at low temperature shall only be determined for mechanically fastened single layer applications in accordance with EN 13897 and the results shall be greater than or equal to the manufacturer's limiting value. SIST EN 13707:2013

EN 13707:2013 (E) 10 5.2.8 Joint strength 5.2.8.1 The peel resistance of joints shall only be determined for mechanically fastened single layer applications in accordance with EN 12316-1 and the results shall lie within the declared tolerance of the manufacturer's declared value. 5.2.8.2 The shear resistance of joints shall be determined for all single layer applications in accordance with EN 12317-1 and the results shall lie within the declared tolerance of the manufacturer's declared value. 5.2.9 Water vapour properties If necessary, the moisture resistance factor µ of reinforced bitumen sheets may be determined in accordance with EN 1931. If the factor µ is not determined, a value of 20 000 may be used for calculation purposes. 5.2.10 Tensile properties The tensile properties shall be determined in accordance with EN 12311-1 and the results (for the longitudinal and transverse directions) shall lie within the declared tolerance of the manufacturer's declared value. 5.2.11 Resistance to impact Where required, the resistance to impact shall be determined in accordance with EN 12691 and shall be expressed as the maximum drop height of the puncturing tool in millimetres, which has not caused leakage of the flexible sheet, which shall be greater than or equal to the manufacturer's limiting value. Products shall be tested in accordance with EN 12691:2006, method A. Where subject to regulatory requirements or where the manufacturer wishes to make such a declaration, products shall also be tested in accordance with EN 12691:2006, method B.

The method(s) used shall be stated in the product data sheet. 5.2.12 Resistance to static loading The resistance to static loading shall be determined in accordance with EN 12730:2001, method A and shall be greater than or equal to the manufacturer's limiting value. 5.2.13 Resistance to tearing (nail shank) The resistance to tearing (nail shank) shall be determined in accordance with EN 12310-1 and the results shall lie within the declared tolerance of the manufacturer's declared value. 5.2.14 Resistance to root penetration The resistance to root penetration shall be determined only for products used as root barriers in roof gardens in accordance with EN 13948 and shall give a pass result. 5.2.15 Dimensional stability The dimensional stability shall be determined in accordance with EN 1107-1 and shall be less than or equal to the manufacturer's limiting value. This test shall only be carried out on sheets containing organic fibres or synthetic fibres (e.g. jute, hessian, polyester, polyolefines). 5.2.16 Form stability under cyclic temperature change The form stability under cyclic temperature change shall be determined only for sheets with metal foil surfacing in accordance with EN 1108 and shall be less than or equal to the manufacturer's limiting value. SIST EN 13707:2013

EN 13707:2013 (E) 11 5.2.17 Flexibility at low temperature (pliability) The flexibility at low temperature shall be determined in accordance with EN 1109 and shall be less than or equal to the manufacturer's limiting value. This test does not give results directly corresponding to the application conditions in practice. Results should only be used to compare products of similar thickness and construction. In the case of sheets with the same bituminous compound on both sides and where the reinforcement is placed in the cross section visually closer to the upper surface, the test shall be performed on the bottom face only.

If the upper surface is covered with a non-woven (e.g. tissue, fleece, etc.) or metal facing, the test shall be performed on the bottom side only. If the sheet on the upper surface is covered with permanent light surface protection and where the reinforcement is placed in the cross section visually closer to the upper surface, the test shall be performed on the bottom side only. 5.2.18 Flow resistance at elevated temperature The flow resistance at elevated temperature shall be determined in accordance with EN 1110 and shall be greater than or equal to the manufacturer's limiting value. 5.2.19 Artificial ageing behaviour 5.2.19.1 Top layers and single layers with permanent light surface protec

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