1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 12086:2013Thermal insulating products for building applications Determination of water vapour transmission propertiesBS EN 12086:2013 BRITISH STANDARDNational forewordThis
2、British Standard is the UK implementation of EN 12086:2013. It supersedes BS EN 12086:1997, which is withdrawn.The UK participation in its preparation was entrusted to T e c h n i c a l C o m m i t t e e B / 5 4 0 , E n e r g y p e r f o r m a n c e o f m a t e r i a l s components and buildings.A l
3、ist 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. The British Standards Institution 2013. Published by BSI Standard
4、s Limited 2013.ISBN 978 0 580 78045 5 ICS 91.100.60 Compliance with a British Standard cannot confer immunityfrom legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2013.Amendments issued since publicationDate T e x t
5、a f f e c t e dBS EN 12086:2013EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12086 March 2013 ICS 91.100.60 Supersedes EN 12086:1997English Version Thermal insulating products for building applications - Determination of water vapour transmission properties Produits isolants thermiques destin
6、s aux applications du btiment - Dtermination des proprits de transmission de la vapeur deau Wrmedmmstoffe fr das Bauwesen - Bestimmung der Wasserdampfdurchlssigkeit This European Standard was approved by CEN on 15 December 2012. CEN members are bound to comply with the CEN/CENELEC Internal Regulatio
7、ns 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. T
8、his 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 me
9、mbers 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, Port
10、ugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by a
11、ny means reserved worldwide for CEN national Members. Ref. No. EN 12086:2013: EBS EN 12086:2013EN 12086:2013 (E) 2 Contents Page Foreword . 3 1 Scope 5 2 Normative references . 5 3 Terms and definitions 5 4 Principle 6 5 Apparatus . 6 6 Test specimens 7 7 Procedure . 8 8 Calculation and expression o
12、f results 9 9 Accuracy of measurement . 12 10 Test report 12 Annex A (informative) Conversion table for water vapour transmission units 14 Annex B (informative) Examples of test assemblies . 15 Annex C (informative) Information about correction procedures . 16 Bibliography 17 BS EN 12086:2013EN 1208
13、6:2013 (E) 3 Foreword This document (EN 12086:2013) 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
14、text or by endorsement, at the latest by September 2013, and conflicting national standards shall be withdrawn at the latest by September 2013. 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 r
15、esponsible for identifying any or all such patent rights. This document supersedes EN 12086:1997. The revision of this standard contains no major changes, only minor corrections and clarifications of an editorial nature. This European Standard is one of a series of standards which specify test metho
16、ds for determining dimensions and properties of thermal insulating materials and products. It supports a series of product standards for thermal insulating materials and products which derive from the Council Directive of 21 December 1988 on the approximation of laws, regulations and administrative
17、provisions of the Member States relating to construction products (Directive 89/106/EEC) through the consideration of the essential requirements. This European Standard has been drafted for applications in buildings but it may also be used in other areas where it is relevant. This European test stan
18、dard is one of the following group of inter-related standards on test methods for determining dimensions and properties of thermal insulation materials and products, all of which fall within the scope of CEN/TC 88: EN 822, Thermal insulating products for building applications Determination of length
19、 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 insula
20、ting products for building applications Determination of compression behaviour EN 1602, Thermal insulating products for building applications Determination of the apparent density EN 1603, Thermal insulating products for building applications Determination of dimensional stability under constant nor
21、mal laboratory conditions (23 C/50 % relative humidity) 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 deformatio
22、n under specified compressive load and temperature conditions EN 1606, Thermal insulating products for building applications Determination of compressive creep BS EN 12086:2013EN 12086:2013 (E) 4 EN 1607, Thermal insulating products for building applications Determination of tensile strength perpend
23、icular to faces EN 1608, Thermal insulating products for building applications Determination of tensile strength parallel to faces EN 1609, Thermal insulating products for building applications Determination of short-term water absorption by partial immersion EN 12085, Thermal insulating products fo
24、r building applications Determination of linear dimensions of test specimens EN 12086, 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 absorpti
25、on 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 EN 12090, Thermal insulating products for building applications
26、Determination of shear behaviour EN 12091, Thermal insulating products for building applications Determination of freeze-thaw resistance EN 12429, Thermal insulating products for building applications Conditioning to moisture equilibrium under specified temperature and humidity conditions EN 12430,
27、Thermal insulating products for building applications Determination of behaviour under point load EN 12431, Thermal insulating products for building applications Determination of thickness for floating floor insulating products EN 13793, Thermal insulating products for building applications Determin
28、ation of behaviour under cyclic loading EN 13820, Thermal insulating materials for building applications Determination of organic content According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard:
29、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, S
30、weden, Switzerland, Turkey and the United Kingdom. BS EN 12086:2013EN 12086:2013 (E) 5 1 Scope This European Standard specifies the equipment and procedures for determining the water vapour transmission rate, water vapour permeance and water vapour permeability of test specimens in the steady state
31、under different sets of specified test conditions. It is applicable to thermal insulating products. It is intended to be used for homogeneous materials and for products which may contain integral skins or facings of different material(s). A material is considered to be homogeneous, with regard to ma
32、ss distribution, if its density is approximately the same throughout, i.e. if the measured density values are close to its mean density. This test method is not normally used for determining the water vapour transmission properties of single, separate vapour barriers (of high diffusion resistance),
33、such as prefabricated films, foils, membranes or sheets, due to the long duration of the test. For products with a vapour retarder or barrier with a water vapour diffusion equivalent air layer thickness sd 1 000 m (see 3.6) other test methods e.g. IR-detection can be used for measuring the single se
34、parate vapour retarder or barrier, provided that the results obtained are in the same range as the values measured in accordance with this standard. The water vapour transmission rate and permeance values are specific to the test specimen (i.e. the product) thickness tested. For homogeneous products
35、, the water vapour permeability is a property of the material. 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
36、 latest edition of the referenced document (including any amendments) applies. EN 12085, Thermal insulating products for building applications Determination of linear dimensions of test specimens 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.
37、1 water vapour transmission rate g quantity of water vapour transmitted through unit area in unit time under specified conditions of temperature, humidity and thickness 3.2 water vapour permeance W quotient of the water vapour transmission rate of the test specimen and the water vapour pressure diff
38、erence between the two specimen faces during the test 3.3 water vapour resistance Z inverse of water vapour permeance 3.4 water vapour permeability product of the permeance and the thickness of the test specimen BS EN 12086:2013EN 12086:2013 (E) 6 Note 1 to entry: The water vapour permeability of a
39、homogeneous product is a property of the material. It is the quantity of water vapour transmitted per unit of time through a unit area of the product per unit of vapour pressure difference between its faces for a unit thickness. 3.5 water vapour diffusion resistance factor quotient of the water vapo
40、ur permeability of air and the water vapour permeability of the material or the homogeneous product concerned; it indicates the relative magnitude of the water vapour resistance of the product and that of an equally thick layer of stationary air at the same temperature 3.6 water vapour diffusion equ
41、ivalent air layer thickness sdthickness of a motionless air layer which has the same water vapour resistance as the test specimen with the thickness d Note 1 to entry: A conversion table and units for the above definitions are given in Annex A. 4 Principle The test specimen is sealed to the open sid
42、e of a test dish containing a desiccant or an aqueous saturated salt solution. The assembly is then placed in a test atmosphere whose temperature and humidity are controlled. Because of the difference between the partial water vapour pressures in the test assembly and in the test atmosphere water va
43、pour flows through the test specimen. Periodic weighings of the assembly are conducted to determine the rate of water vapour transmission when the steady state is reached. 5 Apparatus 5.1 Test dishes, preferably of circular shape and which are (corrosion) resistant to any desiccant or to the salt so
44、lution which they may be required to contain and impermeable to water or water vapour. These dishes are typically made of glass or metal. The size of the dishes depends on the size of the test specimen to be tested. The difference in size between the upper exposed area (A1) and the lower exposed are
45、a (A2) of the test specimen shall be less than 3 % (see examples in Annex B). Some types of test dish are unsuitable for use with certain materials. This should be stated in the relevant product standard or any other European Technical Specification. 5.2 Measuring instruments, capable of determining
46、 linear dimensions in accordance with EN 12085. 5.3 Template (with edge tapered to facilitate removal after use) with a shape and size corresponding to that of the test dish to duplicate the exposed area of the specimen. The template shall have an area that is at least 90 % of the test specimens sur
47、face in order to limit the edge effect due to non-linear vapour flow (see Annex C). 5.4 Analytical balance, capable of weighing the test assembly to an accuracy of 1 mg or better. If larger test assemblies are used, the weighing accuracy may be determined with respect to the total weight and the req
48、uired accuracy of the test results. 5.5 Chamber, capable of being maintained within 3 % of the required relative humidity and within 1 C of the required temperature. In order to maintain the required conditions throughout the chamber it may be necessary to use air circulation with an air speed of be
49、tween 0,02 m/s to 0,3 m/s. BS EN 12086:2013EN 12086:2013 (E) 7 If a non-injection type humidity chamber is used, saturated salt solutions may then be used. 5.6 Sealant, unaffected by test conditions. The following are examples of suitable sealants: 5.6.1 Mixture of 90 % micro crystalline wax and 10 % of plasticiser (e.g. low molecular weight polyisobutylene). 5.6.2 60 % micro crystalline wax with 40 % refined crystalline paraffin. 6 Test specimens 6.1 Dime
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