CEN/TR 15123:2005
(Main)Design, preparation and application of internal polymer plastering systems
Design, preparation and application of internal polymer plastering systems
This document concerns the design, preparation and application of plaster with polymer as the principal binder type, for internal plastering on all types of background used under normal conditions. It includes plastering onto both new and old backgrounds and the maintenance and repair of existing work. It concerns materials, backgrounds, preparation of the surface to be plastered, choice of suitable polymer plasters, methods of application and inspection and testing of plastering.
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 each country.
Planung, Zubereitung und Ausführung von Polymer-Innenputzsystemen
Načrtovanje, priprava in uporaba notranjih polimernih ometov
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2005
1DþUWRYDQMHSULSUDYDLQXSRUDEDQRWUDQMLKSROLPHUQLKRPHWRY
Design, preparation and application of internal polymer plastering systems
Planung, Zubereitung und Ausführung von Polymer-Innenputzsystemen
Ta slovenski standard je istoveten z: CEN/TR 15123:2005
ICS:
83.140.99 Drugi izdelki iz gume in Other rubber and plastics
polimernih materialov products
91.180 1RWUDQMD]DNOMXþQDGHOD Interior finishing
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
TECHNICAL REPORT
CEN/TR 15123
RAPPORT TECHNIQUE
TECHNISCHER BERICHT
June 2005
ICS 83.140.99; 91.180
English version
Design, preparation and application of internal polymer
plastering systems
Planung, Zubereitung und Ausführung von
Kunstharzinnenputzsystemen
This Technical Report was approved by CEN on 13 May 2005. It has been drawn up by the Technical Committee CEN/TC 125.
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 B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TR 15123:2005: E
worldwide for CEN national Members.
Contents
Page
Foreword. 3
1 Scope. 4
2 Terms and definitions . 4
3 Materials and accessories . 4
4 Design - factors influencing the selection of polymer plastering systems. 5
5 Characteristics of polymer plasters. 6
6 Types and standards of plaster finish . 11
7 Application. 11
Bibliography . 13
Foreword
This document (CEN/TR 15123:2005) has been prepared by Technical Committee CEN/TC 125
"Masonry", the secretariat of which is held by BSI.
This document has been initially 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/TC
125/JWG5 in conjunction with CEN/TC 241. The CEN technical report gives in different sections
guidance for building details, design and materials considerations and the application of polymer
plasters. Relevant data are summarized in a series of tables. The recommendations are framed in
logical sequence, namely materials and accessories; properties of backgrounds that influence the
choice of suitable polymer plastering systems; guidance on preparation of surfaces to be plastered;
choice of suitable polymer plasters; methods of application. It is essential that the design clauses are
read in conjunction with the clauses on background and preparation.
It is not the function of this document 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 with 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.
This TR should be read in conjunction with EN 13914-2.
The following similar Technical Reports are also available:-
CEN/TR 15124:2005 Design, preparation and application of internal gypsum plastering systems
CEN/TR 15125:2005 Design, preparation and application of internal cement and/or lime
plastering systems
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to announce this Technical Report: 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 the United Kingdom.
1 Scope
This document concerns the design, preparation and application of plaster with polymer as the
principal binder type, for internal plastering on all types of background used under normal conditions.
It includes plastering onto both new and old backgrounds and the maintenance and repair of existing
work. It concerns materials, backgrounds, preparation of the surface to be plastered, choice of
suitable polymer plasters, methods of application and inspection and testing of plastering.
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 each country.
2 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
2.1
polymer plaster
plaster with polymer as the principle active binding component. Additives, fillers and aggregates may
be added by the manufacturer. The plaster can be delivered as a powder or ready-to-use
2.2
polymer plaster coat
obtained by application of one layer of the product
2.3
polymer plastering system
polymer plaster coat or sequence of coats to be applied to a background to achieve the required
flatness and smoothness, including the possible use of a support and/or reinforcement and/or
pretreatment
2.4
one coat polymer plaster
polymer plaster applied in one coat which fulfils all the functions of an undercoat and a final coat
2.5
undercoat
lower plaster coat(s) of a plastering system which needs a final coat
2.6
final coat
last plaster coat of a multi-coat plastering system
2.7
efflorescence
formation of crystals on a surface during drying caused by the presence of soluble salts
3 Materials and accessories
3.1 General plasters
3.1.1 General
Where applicable the polymer plaster should conform to prEN 14023. They should be classified in
accordance with EN 13501-1 for reaction to fire.
3.1.2 Polymer plasters (e.g. synthetic resin plaster, silicone plaster)
These thin coat plasters harden mainly by physical drying which can sometimes limit the coat
thickness. There are no general requirements regarding suction and key of the background and the
adhesion to all kinds of dry backgrounds including paints is usually good.
3.1.3 Silicate plasters
These plasters harden chemically and by physical drying. In very rapid drying conditions, precautions
need to be taken to retain sufficient moisture to allow an adequate hardening of the plaster.
3.2 Water
The water should be of a quality such that it does not adversely affect the plaster.
Water fit for drinking is suitable for mixes for plastering
NOTE Attention is drawn to the requirements of EN 1008 in cases where water supplies may be of doubtful
quality.
3.3 Reinforcement and beads
Reinforcement and beads of whatever type, should conform to EN 13658-1 Metal lath and beads –
Definitions requirements and test methods – Part 1: internal plastering.
3.4 Fixings
Fixings for beads such as nails, screws, staples and steel wire should be made of compatible material
and should conform to EN 10223-3, EN 10230-1, EN 10244-1 or EN 10244-2.
4 Design - factors influencing the selection of polymer plastering systems
4.1 Functions and properties that may be required
The function and properties achievable are determined by the choice of plaster type.
A plastering system will need to fulfil some of the following functions or properties:
to even out any small unevenness in the background and provide a flat surface (see Table 1);
to provide a decorative finish or a background for such a finish;
to be vapour permeable;
to have enhanced strength;
to have enhanced resistance to abrasion.
Special plasters can provide enhanced properties for the following aspects:
to improve the acoustic properties of a building element (see 5.4);
4.2 Factors influencing the choice of polymer plasters
The designer should consider all functional and aesthetic aspects of the building.
The choice of polymer plaster(s) or plaster system is determined principally by:
a) type of building (private houses, buildings); purpose of building (flat, school, hospital, office); uses
(for example: wet room);
b) the characteristics of the background;
c) the ambient and operating conditions;
d) the traditional usage in any particular area;
e) the type of finish required.
4.3 Background
Consideration should be given to the compatibility between polymer plasters and the background. To
achieve this compatibility, the following items should be considered:
a) The background should provide adequate support, strength and rigidity for the adhesion of the
plaster.
b) Masonry should conform to the requirements of ENV 1996-2.
c) Boards, slabs and polystyrene should be fixed securely and should only be plastered when they
are dry and dimensionally stable.
d) It is important to avoid:
1) movement of the background, including structural, moisture and thermal movements;
2) defects in the background, e.g. weakness, contamination.
3) efflorescence
Such compatibility is necessary to avoid bond failure between successive coats or between the first
plaster coat and the background.
If any of these inadequate characteristics of the background exist, then other means of providing
support and/or additional adhesion should be used.
If it is necessary to plaster over an existing substrate, ensure that it will have sufficient bond strength
to support and provide adhesion for the new plaster.
Where a plaster coat is applied to cement or cement lime background, it is important that the entire
substrate is mature, clean and dry, otherwise difficulty with decoration due to the migration of alkalis
may be experienced and in extreme cases complete de-bonding of the plaster coat can occur.
5 Characteristics of polymer plasters
5.1 General
Polymer plasters may be decorated with most proprietary finishes when dry.
Polymer plaster can be used in most areas and on most substrates including painted surfaces with or
without pre-treatment. Each coat should be allowed to harden and dry before applying the subsequent
coat.
Polymer plaster, when hardened and dry, is amongst the least troublesome of plaster surfaces in
relation to decorative finish.
5.2 Fire properties
5.2.1 Reaction to fire
See 3.1.
5.2.2 Fire resistance
Resistance to fire is a property of a system (background and plastering) and not of the product itself.
When relevant, the fire resistance of a system including polymer plastering should be tested and
classified in accordance with EN 13501-2.
The manufacturer should declare performance on fire: integrity (E), resistance (R).
5.3 Thermal properties
Normal plasters do not make a significant contribution to thermal insulation. However, they do provide
an effective way of sealing porous surfaces and voids.
5.4 Acoustic properties
Even if standard polymer plasters do not contribute specifically to sound absorption, a polymer
plastering system contributes to sound absorption due to its flexibility (minor critic frequency) and
continuity by filling voids.
If enhanced sound absorption properties are required, then special acoustic plasters should be used.
Sound-absorbent finishes may affect sound transmission indirectly to some extent by reducing the
level of reverberant noise in either the source room or receiving room.
5.5 Resistance to cracking
When the background has been erected in accordance with the relevant standards and the polymer
plaster applied in accordance with this document and the recommendations of the manufacturer, then
the polymer plaster will perform satisfactorily.
The maximum coat thickness recommended by the manufacturer should not be exceeded.
5.6 Water resistance
In wet areas polymer plasters with enhanced water resistance should be used.
5.7 Durability
The durability of polymer plaster can be affected by the following:
Lack of adhesion to the background and between coats e.g. too low or too high temperatures.
Alkali migration from the background.
Contamination from the background e.g. oil, salts.
Dust on the background.
Incorrect usage.
Persistent high humidity and dampness.
Movement in the structure.
5.8 Surface requirements
5.8.1 Flatness
The flatness of the plastered finish will depend upon the accuracy to which the background has been
constructed and the thickness of the plaster specified. Backgrounds which are built within the
tolerances specified in ENV 1996-2 may still not be able to be plastered plumb or to line unless
sufficient plaster thickness is specified. Thinner applications of plaster will only overcome minor
irregularities or small deviations from li
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