1、BRITISH STANDARD BS EN 13914-1:2005 Design, preparation and application of external rendering and internal plastering Part 1: External rendering The European Standard EN 13914-1:2005 has the status of a British Standard ICS 91.100.10 Licensed Copy: Wang Bin, na, Wed May 25 02:25:03 BST 2005, Uncontr
2、olled Copy, (c) BSIBS EN 13914-1:2005 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 March 2005 BSI 29 March 2005 ISBN 0 580 45727 3 National foreword This British Standard is the official English language version of EN 13914-1:2005. The
3、UK participation in its preparation was entrusted by Technical Committee B/544, Plastering, rendering, dry lining, to Subcommittee B/544/5, External rendering, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross
4、-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of B
5、ritish Standards Online. 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 does not of itself confer immunity from legal obligations. aid enquirers to understand the text; pre
6、sent to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an
7、 inside front cover, the EN title page, pages 2 to 63 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments Licensed Copy: Wang Bin, na, Wed May 25 02:25:03 BST 2005, Uncontrolled
8、Copy, (c) BSIEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN139141 March2005 ICS91.100.10 Englishversion Design,preparationandapplicationofexternalrenderingand internalplasteringExternalrendering Conception,prparationetmiseenoeuvredesenduits extrieursetintrieursPartie1:Enduitsextrieurs Planung,Zub
9、ereitungundAusfhrungvonInnenund AuenputzenTeil1:Auenputz ThisEuropeanStandardwasapprovedbyCENon15December2004. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbib
10、liographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotif
11、iedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia
12、, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2005CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN13914
13、1:2005:E Licensed Copy: Wang Bin, na, Wed May 25 02:25:03 BST 2005, Uncontrolled Copy, (c) BSIEN 13914-1:2005 (E) 2 Contents Page Foreword4 1 Scope.5 2 Normative references5 3 Terms and definitions6 4 General8 4.1 Essential principles.8 4.2 Building programme8 5 Materials9 5.1 Materials for site-mad
14、e renders9 5.2 Water.10 5.3 Types of render 10 5.4 Reinforcement, supports and beads11 5.5 Fixings.13 5.6 Firring14 6 Design considerations.14 6.1 General factors affecting the design of the rendering system14 6.2 Characteristics of backgrounds .15 6.3 Adequacy of the background .16 6.4 Durability o
15、f the rendering 18 6.5 Conditions of exposure.18 6.6 Resistance to rain penetration .19 6.7 Resistance to water rising from the ground without pressure .19 6.8 Soluble salts.19 6.9 Effects of atmospheric pollution 20 6.10 Effects of freezing20 6.11 Resistance to impact .20 6.12 Corrosion of metals .
16、20 6.13 Resistance to cracking21 6.14 Thermal considerations.23 6.15 Fire resistance and combustibility.23 6.16 Protection afforded by architectural features and functions 23 6.17 Selection of types of render and render mixes.25 6.18 Number, thickness and relative strength of coats .26 6.19 Types of
17、 finish29 6.20 Colour and texture .30 7 Work on site, preparation and application of renderings31 7.1 Storage of materials.31 7.2 Scaffolding31 7.3 Protection of adjacent surfaces .31 7.4 Preparation of background .32 7.5 Proportioning of mix materials on site 35 7.6 Mixing on site .36 7.7 Forming a
18、rchitectural features .36 7.8 Application of the various coats 36 8 Recommendations for maintenance and repair (other than restoration of old and historic buildings)38 8.1 General38 8.2 Inspection.38 Licensed Copy: Wang Bin, na, Wed May 25 02:25:03 BST 2005, Uncontrolled Copy, (c) BSIEN 13914-1:2005
19、 (E) 3 8.3 Repairs to cracks .38 8.4 Repair of hollow or detached areas .39 8.5 Overcoming unsatisfactory appearance .39 8.6 Overcoming water penetration .40 Annex A (informative) General guidance on the selection of site mixed prescribed renders mixed according to background type ) .57 Annex B (inf
20、ormative) Restoration of renders on old and historic buildings ) 58 Bibliography 63 Licensed Copy: Wang Bin, na, Wed May 25 02:25:03 BST 2005, Uncontrolled Copy, (c) BSIEN 13914-1:2005 (E) 4 Foreword This document (EN 13914-1:2005) has been prepared by Technical Committee CEN/TC125 Masonry, the Secr
21、etariat of which is held by BSI, following preparation by CEN/TC125/JWG5 - Joint Working Group with CEN/TC241 for codes of application for external rendering and internal plastering, in conjunction with CEN/TC241. The first draft was prepared by the European section of International Union of Contrac
22、tors of Plastering, Dry Lining, Stucco and Related Activities (UIEP) at the request of the CEN Technical Sector Board (Resolution No. BTS1/56/1991). 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
23、 September 2005, and conflicting national standards shall be withdrawn at the latest by September 2005. This document gives requirements 1 )and recommendations for building details, design and materials considerations, the selection of mixes and the application of cement-based and lime-based renderi
24、ngs on external backgrounds. NOTE (to English version only) The term rendering mortar is used in the European Standard product specification EN 998-1, but to reflect common usage in relation to this document and for ease of reference the term render (noun) has been used. A rendered finish may be app
25、lied to a variety of backgrounds, either to improve resistance to rain penetration and weathering and/or for aesthetic reasons. For the purposes of this document (except where stated in relation to a specific product standard) the term strength should be considered in terms of relative strengths bet
26、ween different types of backgrounds compared with the nominal strengths of prescribed render mixes. Although it may be possible to consider this in terms of compressive strength, this standard deals with aspects of a craft as opposed to design calculations. Therefore strength is not considered in te
27、rms of numerical values derived from test. Similar considerations also apply to terms such as movement, absorbency and permeability etc. used in this document. This document refers only to the technical suitability of materials and/or procedures. The user will during the application need to observe
28、any legal obligations relating to health and safety at any stage. The values of certain parameters in this document may be set by CEN members so as to meet the requirements of national regulations. These parameters are designed by |_| in the text. Because this document is a code-like document as opp
29、osed to the more conventional EN product standard, it is appropriate to mention that, as with product standards, the use of the verbal form shall denotes a requirement for which verification of compliance has to be able to be demonstrated. Recommendations are denoted by the verbal form should and sh
30、ould be followed unless there is a justifiable reason for not doing so. It is not the function of this standard to assign responsibility for the design and application of any work or actions mentioned within to any specific party. Such responsibility is a matter for other documentation associated wi
31、th the work, e.g. the contract. It has been assumed in the drafting of this document that the application of its provisions is entrusted to appropriately qualified and experienced people, for whose guidance it has been prepared. According to the CEN/CENELEC Internal Regulations, the national standar
32、ds 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, Slov
33、akia, Slovenia, Spain, Sweden and United Kingdom. 1 )This document contains certain elements of specification and other requirements which are denoted by the use of the verbal form shall. Licensed Copy: Wang Bin, na, Wed May 25 02:25:03 BST 2005, Uncontrolled Copy, (c) BSIEN 13914-1:2005 (E) 5 1 Sco
34、pe This document specifies requirements and recommendations for the design, preparation and application of cement, lime or other mineral binders, and/or combinations thereof, masonry cement and polymer modified binder based external renderings, on all common types of backgrounds, to both vertical wa
35、lls and horizontal soffits. It includes rendering on both new and old backgrounds and the maintenance and repair of existing work. Renders with organic materials as the principal binder are not included in the scope of this document. This document gives guidance on the use of established site, facto
36、ry and semi-finished factory made renders. NOTE 1 Because of the many and varied materials and practices in Europe it is not possible for certain aspects of the document to enter into sufficient detail to be fully usable to practitioners in each country. Such recommendations required to complement,
37、but not alter any basic European recommendation are given in documentation prepared by each country. Aspects of this document which may need to be complemented are indicated where they occur by a footnote referencing this paragraph. Due to the wide range of climatic conditions in Europe, it is not p
38、ossible to recommend precise drying times for backgrounds and render coats. Any times given are for guidance only. This document does not cover the following: a) the use and application of special renders for liquid retaining structures, e.g. coatings, and for backgrounds to cladding systems; b) the
39、 structural repair of concrete; c) the installation of proprietary external thermal insulation composite systems (ETICS); d) the specification and use of sealants used to seal joints for use with rendering; e) the use of gypsum based renders used externally, but their use may be permitted in some co
40、untries; NOTE 2 Gypsum based products soften when subject to prolonged moist conditions. The use of such products externally will depend upon the climatic conditions where the render will be used and on the local building traditions. With the exception of some drier countries in southern Europe gyps
41、um based renders are generally not recommended for external use and are therefore not included within the scope of this document. Their use may be permitted and controlled locally 2 . f) the design and installation of flashings at windowsills and elsewhere. At various points in this document referen
42、ce is made to the use of sealants. The specification of sealants and the design of such joints is outside the scope of this document. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies
43、. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 197-1, Cement Part 1: Composition, specifications and conformity criteria for common cements EN 413-1, Masonry cement Part 1: Composition, specifications and conformity criteria. EN 459-1,
44、Building lime Part 1: Definitions, specifications and conformity criteria 2 )Refer to NOTE 1 of Clause 1 for further information. Licensed Copy: Wang Bin, na, Wed May 25 02:25:03 BST 2005, Uncontrolled Copy, (c) BSIEN 13914-1:2005 (E) 6 EN 771-1, Specification for masonry units Part 1: Clay masonry
45、units EN 771-3, Specification for masonry units Part 3: Aggregate concrete masonry units (Dense and light-weight aggregates) EN 934-3, Admixtures for concrete, mortar and grout Part 3: Admixtures for masonry mortar Definitions, requirements, conformity, marking and labelling EN 998-1, Specification
46、for mortar for masonry Part 1: Rendering and plastering mortar EN 1008, Mixing water for concrete Specifications for sampling, testing and assessing the suitability of water, including water recovered from processes in the concrete industry, as mixing water for concrete EN 12878, Pigments for the co
47、louring of building materials based on cement and/or lime Specifications and methods of test EN 13055 (all parts), Lightweight aggregates EN 13139, Aggregates for mortar prEN 13658-2, Metal lath and beads Definitions, requirements and test methods Part 2: External rendering EN ISO 1461, Hot dip galv
48、anized coatings on fabricated iron and steel articles Specifications and test methods (ISO 1461:1999) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 render (rendering mortar 3 ) ) (noun) mixture of one or more inorganic binders, aggregates, water and sometimes admixtures and/or additions used as an external render 3.2 render (verb) action of applying render 3.3 rendering (i)(verb) application of render (ii)(noun)render when on the background 3.4 factory made rende
