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1、BRITISH STANDARD BS EN 13914-2:2005 Incorporating Amendment No. 1 Design, preparation and application of external rendering and internal plastering Part 2: Design considerations and essential principles for internal plastering The European Standard EN 13914-2:2005 has the status of a British Standar
2、d ICS 91.100.10 ? BS EN 13914-2:2005 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 20 June 2005 BSI 2006 ISBN 0 580 46087 8 National foreword This British Standard is the official English language version of EN 13914-2:2005 incorporating Am
3、endment 1:2006. The UK participation in its preparation was entrusted by Technical Committee B/544, Plastering, rendering, dry lining, to Subcommittee B/544/4, Plastering. A list of organizations represented on B/544/4 can be obtained on request to its secretary. This document should be read in conj
4、unction with BS 8481 and CEN/TR 15123 especially regarding surface requirements, flatness, types of finish, angularity, etc. !Users should note that CEN/TR 15123, Design, preparation and application of internal polymer plastering systems has not been incorporated into BS 8481. It is important that s
5、pecifiers realize the difference between smoothness and flatness and the relationship to the background smoothness provided (see 4.9.2, 4.9.3 and Table 1). Users are advised to specify the class of smoothness and flatness separately in any specification. It is considered normal practice in the UK to
6、 specify a class of flatness of 3. More information is provided in national annex NA.“ Cross-references 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 co
7、nfer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 22, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments is
8、sued since publication Amd. No. DateComments 1644729 September 2006Amends foreword and introduces National Annex A EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 13914-2 May 2005 ICS 91.100.10 English version Design, preparation and application of external rendering and internal plastering - P
9、art 2: Design considerations and essential principles for internal plastering Conception, prparation et mise en oeuvre des enduits intrieurs et extrieurs - Partie 2: enduits intrieurs Planung, Zubereitung und Ausfhrung von Innen- und Auenputzen - Teil 2: Planung und wesentliche Grundstze fr Innenput
10、z This European Standard was approved by CEN on 3 March 2005. 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 refe
11、rences 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 i
12、nto 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, Lithuani
13、a, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2005 CENAll righ
14、ts of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13914-2:2005: E EN 13914-2:2005 (E) 2 Contentspage Foreword. 3 1Scope 4 2Terms and definitions. 4 3Essential principles and building programme.6 4Design 7 Table 1 Classification of flatness of pl
15、astered finish 13 Table 2 Recommended limits for angularity. 13 Figure 1 Example of measurement of angularity of plastered reveal showing length ?, for ? less than 0,25 m. 14 5Preparation and application of plasters . 14 6Restoration of plasters on old and historic buildings 16 Annex A (normative) D
16、esign considerations for work and acceptance of smooth plaster finishes. 18 Annex B (informative) Methods of minimising the occurrence of cracks . 20 Bibliography . 21 EN 13914-2:2005 (E) 3 Foreword This document (EN 13914-2:2005) has been prepared by Technical Committee CEN/TC 125 “Masonry”, the se
17、cretariat 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 October 2005, and conflicting national standards shall be withdrawn at the latest by October 2005. The initial dr
18、aft of this document was prepared by the European section of International Union of Contractors of Plastering, Dry Lining, Stucco and Related Activities (UIEP) at the request of the CEN Technical Sector Board (Resolution No.BTS1/56/1991). It has been revised by CEN/TC125/JWG5 in conjunction with CEN
19、/TC 241. Relevant data are summarized in a series of tables. This part of EN 13914 applies to design for plaster made of mortars containing inorganic and organic binders and mineral aggregate1), applied on internal vertical and soffit surfaces of structures. Aspects of this document where basic reco
20、mmendations may need to be complemented by additional recommendations are indicated by a footnote referencing the Foreword. Because this standard is a code-like document as opposed to the more conventional EN product standard, it is appropriate to mention that, as with product standards, the use of
21、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 should be followed unless there is a justifiable reason for not doing so. It is not the function of this standard to assign re
22、sponsibility 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 with the work, e.g. the contract. It has been assumed in the drafting of this document that the application of its provisions
23、is entrusted to appropriately qualified and experienced people, for whose guidance it has been prepared. Separate CEN Technical Reports containing guidance relating to the design, preparation and application of plaster and plastering systems for gypsum, cement and/or lime (CEN/TR 15125) and polymer
24、plasters (CEN/TR 15123) are available. 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, Hunga
25、ry, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. 1) The aggregate can be omitted from mortars made from gypsum plaster or anhydrite binders. EN 13914-2:2005 (E) 4 1 Scope This
26、standard concerns the design considerations and essential principles for internal plastering systems and application of plastering systems. The standard gives in different parts requirements and recommendations for building details, design and materials considerations, the selection of mixes and the
27、 application of gypsum plasters; gypsum/lime plasters; premixed lightweight plasters; anhydrite plasters; lime/gypsum; cement and cement/lime based plasters; lime based plasters, silicate plasters, polymer plasters and polymer modified plasters. This standard does not deal with the following: extern
28、al finishes; painting and or preparation; impregnations; structural repair of concrete; fibrous plasterwork Because of the many and varied materials and practices in Europe it is not possible for certain aspects of the standard to enter into sufficient detail to be fully usable to practitioners in e
29、ach country. Such guidance to complement, but not alter any basic European recommendations are given in documentation prepared by each country. Aspects of this European Standard whose basic recommendations may need to be complemented are indicated where they occur by a footnote referencing this clau
30、se. Further information is given in Technical Reports as follows: CEN/TR 15124 Design, preparation and application of internal gypsum plastering systems; CEN/TR 15125 Design, preparation and application of internal cement and/or lime plastering systems; CEN/TR 15123 Design, preparation and applicati
31、on of internal polymer plastering systems. 2 Terms and definitions For the purposes of this document, the following terms and definitions apply. 2.1 plaster mixture based on one or more binders, that is applied while plastic and that hardens after application, used to obtain an internal surface fini
32、sh. It does not acquire its final characteristics until it has set and/or hardened on the building component 2.2 plastering the application of plaster 2.3 plaster coat obtained by application of one or more layers with one or more mixes of the same product EN 13914-2:2005 (E) 5 2.4 plaster layer pla
33、ster applied wet on wet to obtain the final thickness with one or more mixes of the same product, when all operations are completed before the plaster has set 2.5 plastering system plaster coat or sequence of plaster coats applied to a background, including the possible use of a support and/or reinf
34、orcement and/or pre-treatment 2.6 undercoat lower plaster coat or plaster coats of a plastering system 2.7 final coat last plaster coat of a multicoat plastering system 2.8 one coat plaster plaster applied to a non-plastered background in one coat which fulfils all the functions of an undercoat and
35、a final coat 2.9 skim coat thin (e.g. 2 mm or 3 mm) plaster coat applied to a non-plastered background 2.10 background surface of a construction element to which a plastering system is to be applied 2.11 reinforcement material incorporated within a plaster coat to improve resistance to cracking (e.g
36、. mesh) 2.12 support product attached to the background to which a plaster is applied so that the plastering system is largely independent of the background (e.g. lathing) 2.13 lining true representation of a frame which was to be plastered up to 2.14 depth gauge a band of plaster or bead used in se
37、tting for a required thickness or evenness 2.15 bonding agent proprietary material used to improve adhesion of the plastering system to the background where necessary 2.16 primer to reduce suction material for pretreatment, to reduce the suction of the background where necessary EN 13914-2:2005 (E)
38、6 2.17 spatterdash or stipple pretreatments to prepare a background for plastering. They do not form a coat in the plastering system 2.18 crazing network of short, irregular and very fine cracks 2.19 efflorescence formation of crystals on a surface during drying caused by the presence of soluble sal
39、ts 3 Essential principles and building programme 3.1 Essential principles The design shall include drawings and specifications, e.g. quantities, prepared in detail to afford proper guidance in the preparation of estimates and the execution of the work. Prior to the commencement of the contract there
40、 should be an exchange of information between all parties concerned. When preparing plastering details the design shall take into account the following points: a) nature and condition of the background, including any necessary pretreatment; b) functional requirements; c) type of plaster and other ma
41、terials to be used in the plastering system. It is recommended that these materials should conform to appropriate documents where available and where not available should conform to standards accepted in the place of use. See also prCEN/ TRs for gypsum; cement and/or lime and polymer plasters; d) ty
42、pe of finish/appearance; e) thickness required including: 1) the finished sizes and heights of rooms or other spaces; 2) details of the nature of the junctions with door frames, ceilings, linings etc; 3) the positioning of installations and fittings; 4) any other situations which may affect the plas
43、ter thicknesses. f) preparation of the different building surfaces to receive the various types of cornices, arrises, corner treatments, metal accessories (such as angles and beads), expansion joints, etc.; g) work of other trades, particularly in connection with service pipes, conduits, wiring and
44、so forth, that are to be covered by or buried in the plaster; h) compatibility of the plaster with adjacent materials. A record should be kept of the dates of completion of each area in larger projects by the plastering contractor. EN 13914-2:2005 (E) 7 Adequate lighting shall be provided during the
45、 plastering work. See Annex A. 3.2 Building programme In preparing a time schedule for the work involved in a building, each operation should be considered in relation to the others. Agreement shall be obtained between all the various parties on the programme times for all the necessary operations a
46、nd the correct sequence for carrying out these operations. The programme should be kept up-to-date as the project proceeds and damage by subsequent trades should be avoided. The following items shall be considered by those involved in planning the programme. a) plastering should only commence in tho
47、se parts of the building which are weather tight; b) time for the background to be completed and for all the preceding trades to be complete; c) time for the background to be investigated and to dry out; d) time to allow for any periods when the background and air temperatures fall below 5 C. (Alter
48、natively heating may be provided to keep the temperatures above 5 C); e) sufficient area of background to be available at any one time for plastering; f) time for the preparation of the background, application and drying out of each coat of plaster; g) time for inspection and repair, if necessary; h
49、) time for drying out the plaster prior to painting or other decoration; i) avoid late alterations. 4 Design 4.1 Factors influencing the plastering system 4.1.1 Design functions and properties of a plastering system A plastering system may need to fulfil one or more of the following functions or properties: to have sufficient resistance to abrasion (see 4.2.6). to even out any small unevenness in the background and provide a flat surface (see 4.9.3); to provide a