EN 13948:2007

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Abdichtungsbahnen - Bitumen-, Kunststoff- und Elastomerbahnen für Dachabdichtungen - Bestimmung des Widerstandes gegen DurchwurzelungFeuilles souples d'étanchéité - Feuilles d'étanchéité de toiture, bitumineuses, plastiques et élastomeres - Détermination de la résistance a la pénétration des racinesFlexible sheets for waterproofing - Bitumen, plastic and rubber sheets for roof waterproofing - Determination of resistance to root penetration91.100.50Veziva. Tesnilni materialiBinders. Sealing materials91.060.20StreheRoofsICS:Ta slovenski standard je istoveten z:EN 13948:2007SIST EN 13948:2007en,fr,de01-oktober-2007SIST EN 13948:2007SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 13948June 2007ICS 91.100.50 English VersionFlexible sheets for waterproofing - Bitumen, plastic and rubbersheets for roof waterproofing - Determination of resistance toroot penetrationFeuilles souples d'étanchéité - Feuilles d'étanchéité detoiture, bitumineuses, plastiques et élastomères -Détermination de la résistance à la pénétration des racinesAbdichtungsbahnen - Bitumen-, Kunststoff- undElastomerbahnen für Dachabdichtungen - Bestimmung desWiderstandes gegen DurchwurzelungThis European Standard was approved by CEN on 23 May 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 13948:2007: ESIST EN 13948:2007

1 Scope This European Standard specifies a method to determine the resistance of roof waterproofing sheets to root penetration. This European Standard relates exclusively to sheets. It is not possible to test a system comprising several different sheets. This European Standard does not contain any evaluation of the sheet to be tested in respect of its environmental requirements. 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 13037, Soil improvers and growing media — Determination of pH EN 13038, Soil improvers and growing media — Determination of electrical conductivity EN 13651, Soil improvers and growing media — Extraction of calcium chloride/DTPA (CAT) soluble nutrients 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 root penetration roots that have grown into and/or through the surface or joints of a sheet under test where the underground parts of the plants have actively created cavities and thus damaged the sheet 4 Principle The protection against root penetration of a sheet is tested in containers where the sheet is under exposure to roots under specified conditions. The test specimens of the sheet are installed in 6 test containers. The sheet shall have four wall corner joints, two base corner joints and one central T joint (see Figure 2). Additionally there shall be two control containers without sheets providing a comparison of the vitality of the plants in the test and control containers throughout the whole test period. The containers receive a layer of growing substrate and a dense covering of vegetation. This produces a high growing pressure from the roots, emphasised by a limited amount of fertiliser and a moderate watering. The test and control containers are exposed in a climate-controlled greenhouse, in which the parameters having an influence on the growing of the plants can be controlled. The growing period is 2 years as this period is the minimum time necessary to obtain reliable results. SIST EN 13948:2007

Dimemsions in millimeters 80025035 Figure 1 — Construction of container 5.3 Moisture layer A layer of coarse mineral granulates shall be placed on the transparent bases of the containers. It shall be permanently kept moist to encourage the roots to draw down onto the transparent base, in order to observe any early penetration of the roots This layer shall be composed of expanded slate/clay (grain fraction 8/16) of a quality suitable for use in hydroponics systems. When determined in accordance with EN 13038, the expanded slate/clay shall have an electrical conductivity of < 15,0 mS/m. 5.4 Pressure distribution layer In order to achieve a uniform distribution of the pressure, a fleece or woven material, ≥ 170 g/m² and chemically compatible with the sheet to be tested, shall be placed directly under the sheet onto the moisture layer. 5.5 Growing substrate A mixture of homogeneous materials of identified quality available permanently at all of the test sites. It shall be structurally stable and show a favourable water/air rate and weak base fertiliser content for optimal development of the roots of the test plants. The growing substrate shall be a blend of:  70 % by volume of barely decomposed peat which shall have an electrical conductivity of < 8,0 mS/m when determined according to EN 13038 and a pH 4,0 ± 1,0 when determined according to EN 13037;  30 % by volume of expanded slate/clay (grain fraction 8/16) complying with the requirements as specified in 5.3. The growing substrate shall be in direct contact with the test sample. SIST EN 13948:2007
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