BRITISH STANDARD Flexible sheets for waterproofing — Bitumen, plastic and rubbersheets for roof waterproofing — Determination of watertightness after stretching at low temperatures ICS 91.100.50 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 13897:2004 BS EN 13897:2004 National foreword This British Standard is the UK implementation of EN 13897:2004 The UK participation in its preparation was entrusted to Technical Committee B/546, Flexible sheets for waterproofing and water vapour control 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 2009 © BSI 2009 ISBN 978 580 61210 Amendments/corrigenda issued since publication Date Comments BS EN 13897:2004 EN 13897 EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM November 2004 ICS 91.100.50 English version Flexible sheets for waterproofing - Bitumen, plastic and rubber sheets for roof waterproofing - Determination of watertightness after stretching at low temperature Feuilles souples d'étanchéité - Feuilles d'étanchéité de toiture bitumineuses, plastiques et élastomerères Détermination de l' étancheité après étirement basse temperature Abdichtungsbahnen - Bitumen-, Kunststoff- und Elastomerbahnen für Dachabdichtungen - Bestimmung der Wasserdichtheit nach Dehnung bei niedriger Temperatur This European Standard was approved by CEN on 10 September 2004 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 Central Secretariat 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 Central Secretariat has the same status as the official versions CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG Management Centre: rue de Stassart, 36 © 2004 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members B-1050 Brussels Ref No EN 13897:2004: E BS EN 13897:2004 EN 13897:2004 (E) Contents page Foreword Scope Normative references Terms and definitions 4 Principle 5.1 5.2 5.3 5.4 5.5 5.6 Apparatus Tensioning device Dial gauge Conditioning space Vacuum pad Vacuum pump Pressure gauge 6 Sampling Preparation of test specimens Procedure Expression of results 10 Test report BS EN 13897:2004 EN 13897:2004 (E) Foreword This document (EN 13897:2004) 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 May 2005, and conflicting national standards shall be withdrawn at the latest by August 2006 This standard is one of a series of standards which specify test methods for determining dimensions and properties of flexible sheets, as factory made products This European Standard is applied in conjunction with European Standards specifying product characteristics for bitumen, plastic and rubber sheets for waterproofing According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom BS EN 13897:2004 EN 13897:2004 (E) Scope This document specifies a test for determining the ability of flexible sheets to remain watertight after being stretched at low temperature This standard is applicable only for mechanically fastened single layer waterproofing This standard has been drafted for application in roofing, but it may also be used in other areas where it is relevant 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 purpose of this document, the terms and definitions given in the European Standards on product specifications for waterproofing sheets apply Principle The test specimen is stretched at low temperature to a given elongation (percentage) Afterwards the specimen is tested at room temperature in the stretched state for watertightness by means of a vacuum pad and soap solution Apparatus The apparatus consists of the parts given in 5.1 to 5.6 5.1 Tensioning device A tensioning device (example shown in Figure 1) is equipped with two grips to hold one test specimen One grip can be moved in the plane of the test specimen in order to induce elongation and fixed in position at a predetermined value The test specimen shall be strained along its entire width without sliding in the grips BS EN 13897:2004 EN 13897:2004 (E) Dimensions in millimetres Key Test specimen Figure — Device for tensioning of test specimen 5.2 Dial gauge The dial gauge for recording the state of tensioning shall have an accuracy of at least 0,1 mm 5.3 Conditioning space A conditioning space maintained at (−10 ± 2) °C in which the tensioning device is conditioned and operated 5.4 Vacuum pad The vacuum pad for checking watertightness after stretching as shown in Figure can be made of e.g mm thick acrylate plastic BS EN 13897:2004 EN 13897:2004 (E) Dimensions in millimetres Key Pressure gauge Support of height 2-3 mm Rubber gasket of height mm Figure — Vacuum pad for control of tightness after stretching 5.5 Vacuum pump The vacuum pump shall maintain a negative pressure of (15 ± 3) kPa 5.6 Pressure gauge A pressure gauge with an accuracy of 0,2 kPa and mounted on the vacuum pad Sampling Test samples shall be taken in accordance with EN 13416 BS EN 13897:2004 EN 13897:2004 (E) Preparation of test specimens Two test specimens cut in the direction of the manufacture of the material, and two test specimens cut perpendicularly to this shall be taken from the test piece The test specimens shall be taken evenly spaced over the test piece and at least 100 mm from edges The size of the test specimens shall be approximately: 200 mm × 420 mm The test specimens shall be stored for at least 24 h at (23 ± 2) °C and 30 % RH to 70 % RH Procedure Each test specimen is installed in the tensioning device, with a negligible strain, so that the clear gauge length between the grips is (300 ± 2) mm In order to facilitate fixing, the test specimen shall be supported underneath its entire length with a metal sheet during this operation The temperature of the test specimen and the tensioning device shall be (23 ± 2) °C during installation After installation the tensioning device with the test specimen is moved to the conditioning space at (-10 ± 2) °C and kept there for h ± 10 Keeping the tensioning device with the test specimen in the conditioning space, the straining is then carried out at a separation speed of the grips of (15 ± 3) mm/min to the specified level of elongation as given in Table Table — Stages of elongation Gauge length mm 300 300 300 Elongation % 10 Dial gauge reading mm 15 30 The tensioning device is then moved from the conditioning space to a room at (23 ± 2) °C Within to 10 the test specimen is examined for a possible leakage by coating the upper side with a soap solution and by attaching the vacuum pad to the top, applying a pressure difference to the underside of the test specimen of (15 ± 3) kPa If after 60 s no air bubbles are visible, the test specimen is considered to have no leakage Tests with a breakage of the test specimen close to the grips of the tensioning device shall not be taken into account In such case the test shall be repeated Expression of results The watertightness following stretching at low temperature is expressed as the elongation, in percent, which has not caused leakage of the flexible sheet for roofing in four out of four test specimens BS EN 13897:2004 EN 13897:2004 (E) 10 Test report The test report shall include at least the following information a) all details necessary to identify the product tested; b) reference to this European Standard (EN 13897) and any deviations from it; c) information about sampling in accordance with clause 6; d) information about preparation of test specimens in accordance with clause 7; e) information about test procedure in accordance with clause 8; f) test results; g) date of the test BS EN 13897:2004 This page has been intentionally left blank BS EN 13897:2004 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 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