Unknown BS EN 1849 2 2009 ICS 91 100 50 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BRITISH STANDARD Flexible sheets for waterproofing — Determination of thickness and mass[.]
BRITISH STANDARD Flexible sheets for waterproofing — Determination of thickness and mass per unit area Part 2: Plastic and rubber sheets ICS 91.100.50 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 1849-2:2009 BS EN 1849-2:2009 National foreword This British Standard is the UK implementation of EN 1849-2:2009 It supersedes BS EN 1849-2:2001 which is withdrawn The UK participation in its preparation was entrusted to Technical Committee B/546/2, Plastics and rubber sheets for Waterproofing A list of organizations represented on this committee can be obtained on request to its secretary This publication does not purport to include all the necessary provisions of a contract Users are responsible for its correct application Compliance with a British Standard cannot confer immunity from legal obligations This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2010 © BSI 2010 ISBN 978 580 59214 Amendments/corrigenda issued since publication Date Comments BS EN 1849-2:2009 EN 1849-2 EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM December 2009 ICS 91.100.50 Supersedes EN 1849-2:2001 English Version Flexible sheets for waterproofing - Determination of thickness and mass per unit area - Part 2: Plastic and rubber sheets Feuilles souples d'étanchéité - Détermination de l'épaisseur et de la masse surfacique - Partie 2: Feuilles d'étanchéité de toiture plastiques et élastomères Abdichtungsbahnen - Bestimmung der Dicke und der flächenbezogenen Masse - Teil 2: Kunststoff- und Elastomerbahnen für Dachabdichtungen This European Standard was approved by CEN on 19 October 2009 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 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 Management Centre has the same status as the official 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 STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels © 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members Ref No EN 1849-2:2009: E BS EN 1849-2:2009 EN 1849-2:2009 (E) Contents Page Foreword 3 Introduction 4 Scope 5 Normative references 5 Terms and definitions 5 Sampling 7 5.1 5.2 5.3 5.4 5.4.1 5.4.2 5.4.3 5.5 Determination of thickness 7 Principle 7 Apparatus 7 Test specimens 7 Procedure 7 General 7 Mechanical measurement 8 Optical measurement 8 Expression of results 8 6.1 6.2 6.3 6.4 6.5 Determination of mass per unit area 9 Principle 9 Apparatus 9 Test specimens 9 Procedure 9 Expression of results 9 Test report 9 Annex A (informative) Example of the cut cross-section of a membrane 10 BS EN 1849-2:2009 EN 1849-2:2009 (E) Foreword This document (EN 1849-2:2009) has been prepared by Technical Committee CEN/TC 254 “Flexible sheets for waterproofing”, the secretariat of which is held by BSI 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 June 2010, and conflicting national standards shall be withdrawn at the latest by June 2010 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 1849-2:2001 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 BS EN 1849-2:2009 EN 1849-2:2009 (E) Introduction This European Standard is intended for characterisation of plastic and rubber sheets as manufactured or supplied before use This test method relates exclusively to products or to their components where appropriate, and not to waterproofing membrane systems composed of such products and installed in the works This test is intended to be used in conjunction with EN 13956, Flexible sheet for waterproofing — Plastic and rubber sheets for roof waterproofing — Definitions and characteristics BS EN 1849-2:2009 EN 1849-2:2009 (E) Scope This European Standard specifies methods for the determination of the thickness and mass per unit area of plastic and rubber sheets for roof waterproofing 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 13416, Flexible sheets for waterproofing — Bitumen, plastic and rubber sheets for roof waterproofing — Rules for sampling Terms and definitions For the purposes of this document, the following terms and definitions apply 3.1 surface texture textured pattern on one or both surfaces of the sheet creating a difference between the effective and overall thickness not exceeding 0,15 mm NOTE See Figure a) and c) 3.2 surface profile (surface structure) raised area on the surface of the sheet creating a difference between the effective and overall thickness exceeding 0,15 mm NOTE See Figure b) 3.3 internal fabric layer of woven or non-woven fabric of synthetic or mineral fibres incorporated in the sheet This layer may or may not constitute reinforcement NOTE See Figure c) 3.4 backing layer of woven or non-woven fabric of synthetic or mineral fibres or other materials, fixed to the bottom of the sheet NOTE see Figure d) 3.5 overall thickness d thickness of the sheet excluding any surface profile BS EN 1849-2:2009 EN 1849-2:2009 (E) 3.6 effective thickness deff thickness of the sheet providing the waterproofing function including any surface texture but excluding any surface profile and backing a) b) c) Key a) b) c) homogeneous single layer sheet multi-layer sheet sheet with internal fabric c) def d) Key a) b) c) d) sheet with surface texture on one side sheet with surface profiles sheet with surface texture on both sides sheet with backing Figure — Types of surfaces d b) d = deff a) d = deff d = deff Figure — Structure of the sheet BS EN 1849-2:2009 EN 1849-2:2009 (E) Sampling Test samples shall be taken in accordance with EN 13416 Determination of thickness 5.1 Principle The thickness is determined by a mechanical device unless there is a hindrance by a surface profile and/or backing In this case, optical measurement shall be used 5.2 5.2.1 Apparatus Measuring device Capable of indicating the thickness to an accuracy of 0,01 mm The measuring surfaces shall be planar and have a diameter of (10 ± 0,05) mm exerting a pressure of (20 ± 10) kPa on the sheet surface NOTE The determination of thickness according to EN 12311-2 may also be done with a measuring diameter of (5 ± 0,05) mm exerting a pressure of (20 ± 10) kPa on the sheet surface for the dumbbell type 5.2.2 Optical device For sheets with a surface profile and/or backing, capable of indicating the thickness to an accuracy of 0,01mm 5.3 Test specimens The test specimens shall be square or circular in form, and have an area of (10 000 ± 100) mm Cut from the sheet n test specimens (see Table 1) evenly divided over the width b of the sheet, the outer specimen (100 ± 10) mm from the edges (see Figure 3) Table — Required number of test specimens Width of the sheet b [mm] Number of test specimens n [-] 5.4 5.4.1 < 700 701 to 200 201 to 700 701 to 200 201 to 700 701 to 200 201 to 700 > 701 10 Procedure General Condition the sample for at least h at (23 ± 2) °C and (50 ± 5) % relative humidity immediately before measuring Ensure that the sample and the faces of the measuring device are free from contamination for example dust BS EN 1849-2:2009 EN 1849-2:2009 (E) Record all relevant thicknesses of the sheet once per test specimen to 0,01 mm Calculation of the mean value and standard deviation is based on the readings of all test specimens Dimensions in millimetres 2 X 100 ± 10 X 100 ± 10 b Key b x test piece test specimen width of the sheet constant distance between test specimens Figure — Example of cutting plan for test specimens 5.4.2 Mechanical measurement Check the zero point of the measuring device before starting the measurements and recheck after each series of measurements When determining the thickness, lower the foot gently to avoid deforming the material 5.4.3 Optical measurement Measure optically the thickness of a sheet with any surface profile and/or backing The small specimens for optical measurements should not be longer than 10 mm The small specimen shall be cut with a razor-sharp knife from each test specimen The cut cross section of the specimen shall be installed in an angle of (90 ± 5)° to the direction of viewing, using a microscope 5.5 Expression of results The overall thickness (d) shall be stated as the mean thickness of all test specimens The effective thickness (deff) shall be stated as the mean thickness of all test specimens without taking into account any surface profile and/or backing BS EN 1849-2:2009 EN 1849-2:2009 (E) State all the results of sheet thickness and standard deviation to the nearest 0,01 mm NOTE 6.1 Annex A shows an example of a cross-section of a cut membrane Determination of mass per unit area Principle The mass per unit area is determined by weighing a test specimen of known area (The same specimens as used for determination of thickness may be used) 6.2 Apparatus Balance capable of indicating sample weight to an accuracy of 0,01 g 6.3 Test specimens The test specimens shall be square or circular in form, and have an area of (10 000 ± 100) mm2 Cut from the sheet n test specimens (see Table 1) evenly divided over the width b of the sheet, the outer specimen (100 ± 10) mm from the edges (see Figure 3) 6.4 Procedure Condition the test specimens for 20 h at (23 ± 2) °C and (50 ± 5) % relative humidity immediately before weighing Weigh the test specimens to the nearest 0,01 g and calculate the mass per unit area, in g/m 6.5 Expression of results The mass per unit area shall be stated as the mean of the calculated values in g/m rounded to the nearest g/m Test report The test report shall contain at least the following information: a) reference to this document (EN 1849-2) and any deviation from it; b) all details necessary to identify the product tested; c) information on sampling in accordance with Clause 4; d) number of specimens tested; e) conditioning atmosphere used; f) presser-foot size for mechanical measurement of the thickness; g) details of preparation of test specimens in accordance with 5.3, 5.4.3 and 6.3 respectively; h) test results (mean values and standard deviation to the nearest 0,01 mm) in accordance with 5.5 and 6.5 respectively; i) any non-standard procedures or any peculiarities encountered during testing; j) date of testing BS EN 1849-2:2009 EN 1849-2:2009 (E) Annex A (informative) Example of the cut cross-section of a membrane d1 d2 deff mm Key deff effective thickness Figure A1 — Cross-section of a fleece backed membrane at 20X magnification cut with a razor blade NOTE 10 Experience has shown that a magnification of 10X to 20X is sufficient for this test BS EN 1849-2:2009 This page has been intentionally left blank BS EN 1849-2:2009 BSI - British Standards Institution BSI is the independent national body responsible for preparing British Standards It presents the UK view on standards in Europe and at the international level It is incorporated by Royal Charter Revisions British Standards are updated by amendment or revision Users of British Standards should make sure that they possess the latest amendments or editions It is the constant aim of BSI to improve the quality of our products and services We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical 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