CEN/TC 88/WG 18 N 754

Transcription

1 CEN/TC 88/WG 18 N 754 REPLACES: N 744 CEN/TC 88/WG 18 External thermal insulation composite systems of Secretary: juliane.jung@din.de Secretariat: DIN WI (E) - ETICS Specification Date of document Expected action Info

2 CEN/TC 88 Date: TC 88 WI CEN/TC 88 Secretariat: DIN Thermal insulation products for buildings External thermal insulation Specification Wärmedämmstoffe für Gebäude Außenseitige Wärmedämm-Verbundsysteme mit Putzen (WDVS) Spezifikation Produits isolants thermiques pour bâtiments Systèmes composites d'isolation thermique par l'extérieur Spécification ICS: Descriptors: Document type: European Standard Document subtype: Document stage: Working Document Document language: E X:\TA1\TG1-3\NAB\Gremien\2 CEN\CEN_TC_88_WG 18\Meetings\36th meeting _07 Berlin\Result\ETIC_ \TC_88_WI_ _(E).docx STD Version 2.8f

3 Contents European foreword... 4 Introduction Scope Normative references ((will be updated by secretary before CEN-Enquiry)) Terms and definitions Symbols and abbreviations General Description of a design ETICS Description of an assembled kit ETICS components Description of components Adhesive Thermal insulation product Rendering system Mechanical fixing device Ancillary material Worst case definition Consideration for design of the construction works Substrate inspection Planning Consideration of the execution of the works Preliminary remarks Basic principles of installation Maintenance and repair of the works Requirements Preliminary remarks Requirements of the system Reaction to fire Water absorption Water tightness Impact resistance Water vapour permeability Release of dangerous substances Fixing strength for mechanically fixed kits with supplementary adhesive Fixing strength of bonded kits with or without supplementary mechanical fixing devices Airborne sound insulation Thermal resistance Requirements of the components Thermal insulation products Reinforcement Anchors Adhesive Page 2

4 7 Test methods Sampling Conditioning of samples Testing Annex A (normative) Attestation of Performance (AoP) and Factory Production Control (FPC) Annex B (normative) Requirements for thermal insulation products Annex C (informative) Examples of descriptions for ETICS Annex ZA (informative) Relationship between this European Standard and the [essential]/[interoperability]/[ ] requirements of [Directive]/[Regulation]/[Decision]/[ ][Reference numbers of the legal act] aimed to be covered Bibliography

5 European foreword This document (TC 88 WI ) has been prepared by Technical Committee CEN/TC 88 Thermal insulating materials and products, the secretariat of which is held by DIN. This document is a working document. This document will supersede EN 13499:2003 and EN 13500:2003. This European Standard contains four annexes: Annex A (normative) Attestation of Performance (AoP) and Factory Production Control (FPC) Annex B (normative) Requirements for thermal insulation products Annex C (informative) Examples of descriptions for ETICS Annex ZA (informative) Clauses of this European Standard addressing the provisions of the EU Construction Products Regulation. This European Standard is one of a series of standards for insulation products used in buildings, but can be used in other areas where appropriate. 4

6 Introduction This standard covers design External Thermal Insulation Composite Systems (design ETICS) with rendering systems. Kits out of a design ETICS are intended for use as external thermal insulation to the walls of buildings. The walls are made of masonry (bricks, blocks, stones etc.) or concrete (cast on site or as prefabricated panels) with or without rendering systems. The standard describes product characteristics and requirements, marking and labelling for external thermal insulation composite systems (ETICS) with rendering systems on thermal insulation products. Design ETICS are placed on the market as different kits by a system holder, consisting of selected components to improve the thermal insulation of buildings outside walls. Kits have to be installed following system holders instructions to achieve the declared performance. They may include ancillary materials. Assembled kits give protection against weathering and improve the appearance of the buildings. They do not contribute to the stability of the wall. 5

7 1 Scope This European Standard specifies the requirements for design External Thermal Insulation Composite Systems (design ETICS) with rendering systems on thermal insulation products, delivered as a kit by a system holder, and used as thermal insulation for buildings. This European Standard covers ETICS on walls which are made of masonry (bricks, blocks, stones etc.) or concrete (cast on site or as prefabricated panels) with or without rendering systems. This European standard covers thermal insulation products made of cellular glass, expanded polystyrene, expanded cork, mineral wool, phenolic foam, rigid polyurethane foam, extruded polystyrene foam or wood fibre. 2 Normative references ((will be updated by secretary before CEN-Enquiry)) 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 latest edition of the referenced document (including any amendments) applies. EN 822, Thermal insulating products for building applications Determination of length 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 998-1, Specification for mortar for masonry Part 1: Rendering and plastering mortar EN , Paints and varnishes Coating materials and coating systems for exterior masonry and concrete Part 1: Classification EN , Paints and varnishes Coating materials and coating systems for exterior masonry and concrete Part 3: Determination of liquid water permeability EN 1542, Products and systems for the protection and repair of concrete structures Test methods Measurement of bond strength by pull-off EN 1604, Thermal insulating products for building applications Determination of dimensional stability under specified temperature and humidity conditions 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 absorption by immersion EN 12090, Thermal insulating products for building applications Determination of shear behaviour EN 13162, Thermal insulation products for buildings Factory made mineral wool (MW) products Specification EN 13163, Thermal insulation products for buildings Factory made expanded polystyrene (EPS) products Specification 6

8 EN 13164, Thermal insulation products for buildings Factory made extruded polystyrene foam (XPS) products Specification EN 13165, Thermal insulation products for buildings Factory made rigid polyurethane foam (PU) products Specification EN 13166, Thermal insulation products for buildings Factory made phenolic foam (PF) products Specification EN 13167, Thermal insulation products for buildings Factory made cellular glass (CG) products Specification EN 13170, Thermal insulation products for buildings Factory made products of expanded cork (ICB) - Specification EN 13171, Thermal insulating products for buildings Factory made wood fibre (WF) products Specification EN 13172, Thermal insulation products Evaluation of conformity EN 13494, Thermal insulation products for building applications Determination of the tensile-bond strength of the adhesive and of the base coat to the thermal insulation material EN 13495, Thermal insulation products for building applications Determination of the pull off resistance of external thermal insulation composite systems (ETICS) (foam block test) EN 13496, Thermal insulation products for building applications Determination of the mechanical properties of glass fibre meshes EN 13497, Thermal insulation products for building applications Determination of the resistance to impact of external thermal insulation composite systems (ETICS) EN , Fire classification of construction products and building elements Part 1: Classification using test data from reaction to fire test EN 13820, Thermal insulating materials for building applications Determination of organic content EN 15824, Specifications for external renders and internal plasters based on organic binders pren 16382, Thermal insulation products for building applications Determination of the pull-through resistance of anchors through thermal insulation products pren 16383, Thermal insulation products for building applications Determination of the hygrothermal behaviour of external thermal insulation composite systems with renders (ETICS) EN ISO 6946, Building components and building elements Thermal resistance and thermal transmittance Calculation method EN ISO 7783, Paints and varnishes Determination of water-vapour transmission properties Cup method EN ISO 9229:2007, Thermal insulation Definitions of terms (ISO 9229:2007) 7

9 EN ISO 10456, Building materials and products Hygrothermal properties Tabulated design values and procedures for determining declared and design thermal values EN ISO , Reaction to fire tests Ignitability of building products subjected to direct impingement of flame Part 2: Single-flame source test ISO 1887, Textile glass Determination of combustible-matter content 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN ISO 9229:2007 and the following apply. 3.1 adhesive component used for bonding the thermal insulation product to the substrate 3.2 thermal insulation material material that is intended to reduce heat transfer and that derives its insulation properties from its chemical nature and/or its physical structure ((will be deleted later because defined in EN ISO 9229)) 3.3 thermal insulation type group of insulation products of the same thermal insulation material and the same physical structure if a thermal insulation material covers more than one physical structure 3.4 thermal insulation product thermal insulation material in its finished form, including any facings or coatings ((will be deleted later because defined in EN ISO 9229)) 3.5 anchor for thermal insulation products fixing device consisting of a plate for fixing the thermal insulation product and if appropriate also the reinforced base coat, a sleeve which passes through the thermal insulation product and a part which is embedded to the substrate 3.6 anchor for profiles or rails fixing device for fixing the profiles or rails to the substrate 3.7 ancillary material any supplementary component used in addition to the kit, which shall be used according to system holders instructions 3.8 base coat component applied directly by rendering to the thermal insulation product 8

10 3.9 component factory-made product as a functional unit of the design ETICS 3.10 reinforced base coat base coat with embedded reinforcement 3.11 key coat component applied to the base coat as a preparation for the application of the finishing coat 3.12 finishing coat component applied to the reinforced base coat with or without a key coat 3.13 decorative coat component which is applied to the finishing coat contributing to the aesthetic finishing and protection against weathering 3.14 finishing layer finishing coat with a key coat (optional) and/or a decorative coat (optional) 3.15 rendering system reinforced base coat with finishing layer 3.16 design external thermal insulation composite system (design ETICS) combinations of components defined by the system holder, consisting of one base coat, thermal insulation product(s) of the same material, reinforcement(s) and with finishing coats, with adhesive(s) and/or mechanical fixing device(s). Design ETICS may also include key coat(s) and decorative coat(s) kit set of selected products from the components of a design ETICS placed on the market by the system holder to be incorporated in the construction works 3.18 assembled kit a kit after it has been incorporated in the construction works 3.19 glass fibre mesh as reinforcement textile fabrics consisting of continuous glass filament yarn in both the warp and the weft directions embedded in the base coat 3.20 metal mesh as reinforcement galvanised steel or stainless steel mesh embedded in the base coat 9

11 3.21 mechanical fixing device component used for fixing a kit mechanically to the substrate 3.22 substrate part of the wall/test assembly to which a kit is fixed 3.23 system holder single manufacturer who is placing kits out of a design ETICS on the market 3.24 worst case configuration of specified components products of a design ETICS for test purposes that leads to the most discriminating class or level of a certain characteristic of a kit which leads to results valid for a group of configurations with assumed equal or better performance 3.25 supplementary mechanical fixing device mechanical fixing device used primarily to provide stability until the adhesive has dried and act as a temporary connection to avoid the risk of detachment 3.26 supplementary adhesive adhesive used primarily to maintain thermal insulation products to the substrate before mechanical fixing 4 Symbols and abbreviations Abbreviated terms used in this standard: AoP is Attestation of PerformanceAVCP is Assessment and Verification of Constancy of Performance CPR is Construction Products Regulation design ETICS is design External Thermal Insulation Composite System FPC is Factory Production Control DoP is Declaration of Performance Symbols used in this standard: ((include here list of symbols used in this standard)) 5 General Proposal for explanation by HADRAVA 5.1 Description of a design ETICS A design ETICS is defined by the system holder, consisting of one base coat, thermal insulation product(s) of the same material, with adhesive(s) without mechanical fixing device(s) or with adhesives 10

12 and mechanical fixing device(s) or only mechanical fixing device(s), with reinforcement(s), with finishing layer(s) (see Figure 1 Description of design ETICS and kit in relation to construction works). All combinations forming kits as foreseen by the system holder are described in the DoP of the design ETICS. They shall be assessed according to this standard before being placed on the market. According to the requirements of a construction works a designer shall select an appropriate kit from the design ETICS. Key 1 design ETICS 2 construction works 3 assembled kit with ancillary materials 4 assembled kit 5 rendering system 6 reinforced base coat 7 finishing layer A adhesives G key coats B thermal insulation products of the same material H finishing coats C mechanical fixing devices I decorative coats D base coat J ancillary materials E glass fibre mesh or metal mesh as reinforcement K other construction materials, including J, I and H Figure 1 Description of design ETICS and kit in relation to construction works Figure 1 shows the principles of design ETICS, the kits out of it and the relation to construction works. Box 1 contains every product which can be used for a specific kit out of the design ETICS. There is in any 11

13 case only one base coat. Some of the components are not mandatory. Commonly only a few of all possible combinations of the products in box 1 are foreseen by a system holder as kits. Only these combinations belong to the design ETICS. In short, a design ETICS consists of some products and the foreseen combinations for kits thereof. Box 1 shows four kit examples by connecting products with four different lines. These four combinations are repeated at the bottom of the figure. The first kit is only bonded by adhesive. The second one includes any kind of components. The third and the fourth one uses reduced sets of components. These four kits are also illustrated in figures 2 a d. Box 2 stands for the construction works. It includes an assembled kit with ancillary materials, box 3. Ancillary materials may be mastics, joint-covers, corner stripes, corner profiles, base profiles, fire barriers, etc. They are necessary to complete a kit on site. Box 4 intends the assembled kit without ancillary materials. It includes the rendering system, box 5. The rendering system is made of the reinforced base coat, box 6, and the finishing layer, box 7. NOTE In some cases products of a design ETICS may be used for further intended uses. Ancillary materials are used e.g. to form joints or to achieve continuity or to give specific protection (mastics, joint-covers, corner stripes, corner profiles, base profiles, fire barriers etc.). They shall be used in the assembled kit according to system holder s application rules. They are not assessed according to this standard as no harmonized technical specification is available. Ancillary materials should be specified by the system holder in order to ensure the performance, the safety and the durability of the system. 5.2 Description of an assembled kit An assembled kit comprises a thermal insulation product fixed onto the substrate from the outside. The thermal insulation product is faced by a rendering system consisting of a reinforced base coat and a finishing layer. The reinforced base coat incorporates a reinforcing glass fibre mesh or metal mesh. The finishing layer consists of a finishing coat and optional key coat and/or decorative coat. A kit may be fixed to the substrate in different ways: 1) Purely bonded kit: The kit is fully bonded (entire surface of the insulation product covered by adhesive) or partially bonded in strips and/or dabs. 2) Bonded kit with supplementary mechanical fixing devices: The load is totally distributed by the bonding layer. The mechanical fixing devices are used primarily to provide stability until the adhesive has dried and act as a temporary connection to reduce the risk of detachment. 3) Mechanically fixed kit with supplementary adhesive: The wind load is considered to be totally distributed by the mechanical fixing devices. 4) Purely mechanically fixed kit: The kit is fixed to the wall by mechanical fixing devices only. An assembled kit consists of a specific set of products out of a design ETICS delivered by one system holder and is applied onto the wall on site (see Figure 2a - 2d Examples of assembled kits of an ETICS). 12

14 a) Example for purely bonded kit 13

15 b) Example for a mechanically fixed kit with supplementary adhesive 14

16 c) Example for purely mechanically fixed kit with mechanical fixing devices only 15

17 d) Example for purely mechanically fixed kit with metal mesh and complementary mechanical fixing devices Key A adhesives G key coats B thermal insulation products of the same material H finishing coats C mechanical fixing devices I decorative coats D base coat E glass fibre mesh or metal mesh as reinforcement Figure 2 Examples of assembled kits of a design ETICS 16

18 5.3 ETICS components Description of components A component describes a group of factory-made products as a functional unit of the design ETICS. The adhesive, the base coat and the finishing coat can include a range of binders from organic to inorganic. They may be grouped according to the binder type into inorganic (cement-calcium hydroxide, alkali silicate, etc.) and organic (silicon resin, synthetic resin, etc.) products. They are available as: Powder requiring addition of water (dry mortar); Powder requiring addition of extra binder; Paste requiring addition of cement; Ready to use paste Adhesive Component used for bonding the insulation product to the substrate, available as powder, paste or PUadhesive foam Thermal insulation product A thermal insulation product is a factory-made thermal insulation material in its finished form, including any facings or coatings. It provides insulating properties to any kit Rendering system A rendering system consists of the reinforced base coat with finishing layer. The glass fibre mesh or metal mesh is embedded in the base coat all over its area with an overlapping of the stripes of 10 cm or more. NOTE It is possible to use more than one layer of mesh as reinforcement. Rendering systems include the following: Base coat: Coating material applied directly by rendering to the thermal insulation product. The reinforcement is embedded into it and provides most of the mechanical properties of the rendering system. A base coat is available as powder or paste. Key coat: Very thin coating material which may be applied to the base coat as a preparation for the application of the finishing coat. It may also be used for aesthetic reasons. Finishing coat: Coating material which is applied to the reinforced base coat, with or without a key coat. It mainly contributes to the protection against weathering and can provide a decorative coat. A finishing coat is available as powder or paste. For worst case determinations each finishing coat shall be classified into one of the following groups: 1) Aggregate sized coats: Each product is applied in one thickness. The thickness of the finishing coat is slightly higher than the maximum grain size. 17

19 2) Felt coat/modelling coat: Each product is applied in a declared thickness range above maximum grain size. 3) Strippled structural coat: Each product is at a first stage applied in a declared thickness. In a second stage the surface is scratched by a tool, which leads to a reduced average layer thickness. 4) Other coats: Each product not belonging to groups 1), 2) or 3), e.g. flexible brick slips or dry dashed render. Decorative coat: Coating material which may be applied to the finishing coat contributing to the aesthetic finishing and protection against weathering Mechanical fixing device Mechanical fixing devices are used to fix the ETICS to the substrate with or without supplementary adhesives. Different anchor types may be used: to fix thermal insulation products to the substrate with or without supplementary adhesive; to fix rails or profiles to the substrate; to mechanically fix a metal mesh and the thermal insulation product through the insulation layer to the substrate with or without supplementary adhesive Ancillary material Any supplementary component used in addition to the kit, which shall be used according to system holders instructions. Ancillary materials are used e.g. to form joints or to achieve continuity or to give specific protection (mastics, joint-covers, corner stripes, corner profiles, base profiles, fire barriers etc.) 5.4 Worst case definition A design ETICS may include a lot of different configurations for kits. In the DoP the system holder shall declare values, classes or levels for chosen characteristics of every foreseen kit. To enable this not every single configuration needs to be tested. The test result of a specific kit or part of a kit may be also valid for other kits or configurations. The evaluation of this range of configurations is called worst case evaluation. The worst case evaluation shall be performed for every characteristic individually and leads typically to different kits or part of kits per characteristic to be tested. To cover every kit foreseen by the system holder it may be necessary to define more than one worst case configuration per characteristic. The rules for the identification of worst case configurations are given in this standard in Chapter 6 and in EN Consideration for design of the construction works Substrate inspection The substrate, on which the kit is applied, shall be sufficiently airtight and stable. It is necessary to ensure that the substrate is suitable for the fixing method foreseen. 18

20 5.5.2 Planning The designer shall supply all relevant documentation for the construction site. The documentation is the basis for choosing a suitable kit considering the Basic Requirements for construction works, as described below. The details like connections, joints, etc. shall be designed to prevent water penetration. Additional structural elements, e.g. pipes, must not damage the integrity of the assembled kit to keep its performance Mechanical resistance and stability The additional load caused by an assembled kit normally does not lead to a significant risk in terms of the load-bearing capacity of the construction, but it is recommended to take it into account Safety in case of fire The chosen kit shall conform to national requirements for reaction to fire depending on the building to which it is applied Hygiene, health and the environment The chosen kit shall conform with national requirements. National regulation on dangerous substances may require verification and declaration on release, and sometimes content, when construction products covered by this standard are placed on those markets. In the absence of European harmonized test methods, verification and declaration on release/content should be done taking into account national provisions in the place of use. NOTE An informative database covering European and national provisions on dangerous substances is available at the Growth-Website on Europe access through index_en.htm Safety and accessibility in use The chosen method of fixing of a kit to the substrate shall be laid down in the design and/or other relevant documentation for the construction site. It is based on substrate characteristics and the chosen kit. Purely bonded kits and bonded kits with supplementary fixing devices: If national requirements are not established, it is recommended to request the minimum value of bond strength of the adhesive to the substrate of 80 kpa when tested in-situ. Purely mechanically fixed kits and mechanically fixed kits with supplementary adhesives: The calculation of wind suction shall be done according to EN 1990 and EN with its national Annexes. In absence of a national Annex recommendations are given in EN Specific national requirements, if existing, have to be considered. The wind load resistance of the kit shall be calculated according to this standard and all relevant information for calculation shall be delivered with the Declaration of Performance of the design ETICS. The mechanical fixing devices shall have declared values for the pull-out resistance and shall comply with European technical specification. The pull-out resistance of an anchor from the substrate shall be considered when calculating the wind load resistance. Aspects of accessibility need not be taken into account. 19

21 Protection against noise If national regulation requires assessing the kit s contribution to the airborne sound insulation of a building envelope, the values declared in the Declaration of Performance are used with regard to the use conditions of the declared values (kit, properties of the construction) Energy economy and heat retention The heat transfer through an insulated wall is assessed according to national regulation Sustainable use of natural resources Environmental aspects of a kit can be calculated according to European harmonised standards, e.g. EN (Environmental System Declaration) Aspects of durability and serviceability Based on the anticipated exposure of the assembled kit to human activity in its vicinity, it is recommended to consider impact resistance when designing the kit. Based on existing experience the life-cycle of assembled kits according to this standard may be 50 years or more in case of proper use, frequent care and maintenance. Ancillary materials shall be designed accordingly. During this life-cycle the insulating performance of an assembled kit may be improved by the application of another ETICS on top of the existing one. 5.6 Consideration of the execution of the works Preliminary remarks The works shall be executed by trained installers. Any relevant documentation for the construction site shall include a detailed description of the installation of the kit, specifying the required procedures (preparation of substrates, especially in case of renovation, bonding, anchoring, execution of a base coat and a finishing coat, treatment of details, etc.), their sequence and timing of operations, the methods of application (machinery, equipment, tools), amounts of materials used, drying times, as well as temperature and the substrate's humidity limits for use. Installation of the kit shall comply with national regulation, design, system holder s instructions and relevant documentation for the construction site Basic principles of installation Following principles shall be considered during installation: a) The substrate has to be appropriate for the chosen kit. b) Rows of insulation products are positioned so that vertical joints are staggered. c) Joints between insulation products shall be tightly butted or filled by PU foam. Joints shall be free of mineral/paste-like products. d) Incorrectly installed anchors shall be removed and replaced by new ones in the vicinity. 20

22 e) The installed insulation products shall provide a flush surface to ensure the application of an even thickness of reinforced base coat. f) The insulation product shall be protected from the environment before it begins to degrade. g) The thickness of the reinforced base coat and the finishing coat shall be as specified in system holder s documentation. h) Climatic conditions and time intervals shall meet the requirements as specified in system holder s documentation when applying the components. i) The reinforcement shall be fully embedded in the base coat, having sufficient cover. Reinforcement strips shall overlap 10 cm or more. j) Means of fire protection (e. g. fire barriers) shall be installed according to system holder s documentation and national regulation, if required. k) Connections of the kit to adjacent building elements (e. g. windows, roofs, wall claddings, different kits) shall be carefully planned, designed and executed. 5.7 Maintenance and repair of the works The finishing coat should be maintained in order to fully preserve the kit s performance. Maintenance includes at least frequent visual inspection of the assembled kit and repair of damaged areas as soon as possible. Only compatible products shall be used for repairs of an assembled kit. 6 Requirements 6.1 Preliminary remarks Product characteristics shall be assessed in accordance with clauses 6.2 and 6.3. Where zero classes or levels are defined and no performance of a characteristic is determined, the zero classes or levels shall be declared. ((Note to TG8: check clauses 6.2 and 6.3 where zero classes or levels should be introduced meeting TG )) 6.2 Requirements of the system Reaction to fire Reaction to fire of kits out of a design ETICS shall be tested according to EN and classified in accordance with EN Worst case definitions are given in EN Water absorption The water absorption of the thermal insulation product coated with the reinforced base coat and the water absorption of the thermal insulation product coated with the rendering system shall be measured according EN 1609 procedure B. All test results shall not exceed w = 2,5 kg/m². Test results are also used for the evaluation of worst case scenarios in

23 Deviating from EN 1609 the following procedure shall be carried out: Preparation, sealing, storing and conditioning and measurement of the wiped samples shall be carried out according EN The reverse side of the sample shall not be sealed. The test specimen shall be dried to constant mass (less than 0,3 M-% difference within 24 h). dry mass of the sample plus the water-uptake in the beginning, m 3min, shall be measured after 3 min. The depth of submersion shall be at least 2 mm over the whole surface. Key A insulation product B reinforced base coat C finishing layer 1 water surface 2 distance of at least 2 mm Figure 3 Minimum depth of submersion of the test specimen for water absorption The test result is calculated by equation (1): where = (1) W p m 24h short term water absorption in kilogram per square meter mass of the test specimen after 24 hours of partial immersion in kilogram m 3min A p mass of the test specimen after 3 minutes of partial immersion in kilogram bottom boundary area ((amend according to EN 1609)) of the test specimen in square meters Test specimens shall be prepared according to system holders instructions for end use application. 22

24 For the worst case configurations the following rules apply: Use the thermal insulation product(s) according to chapter water tightness. Use the base coat in one or two thicknesses according to the rules given in figure 5. Use for each type of reinforcement the product with the lowest mass per square meter. Key 1 Aggregate sized coats according to EN Felt coats/modelling coats according to EN Aggregate sized coats according to EN Felt coats/modelling coats according to EN Stippled structural coats according to EN Others Figure 4 FINISHING COATS: Selection of the finishing coats which shall be tested Choose the finishing coat(s) by a procedure which is explained in figure 4 (FINISHING COATS: Selection of the finishing coats which shall be tested). Start in column I with all finishing coats, represented by coloured squares. Finishing coats which differ only in the grain size have the same colour. Sort the finishing coats into the following groups: 1) Aggregate sized coats according to EN ) Felt coats/modelling coats according to EN ) Aggregate sized coats according to EN ) Felt coats/modelling coats according to EN

25 5) Stippled structural coats according to EN ) Others. Column II shows the result. Specify the water absorption acc. EN or EN resp. of the products with the representative grain size. They are marked with a dotted frame in column III. This step is only relevant for finishing coats according to EN 998 or to EN If no test results according to EN or EN are available, products shall be considered as belonging to group 6 (Others). Identify the highest declared water absorption within each group and find the products you have to consider, only differing in grain size. In the example in figure 4 (FINISHING COATS: Selection of the finishing coats which shall be tested), column IV, the highest value within the first group is marked in row three by a dashed frame. The products in this row shall be considered. The product with the average grain size (rounded) out of this row shall be tested. It is identified in figure 7 (FINISHING COATS: Selection of the finishing coats which shall be tested), column V with a drawn through frame. In addition to the products out of group 1 to 5, choose every product of other finishing coats, group 6. The example in figure 4 (FINISHING COATS: Selection of the finishing coats which shall be tested). shows 12 products which shall be tested, marked by a drawn through frame, one out of each group 1 to 5 and all products out of group 6. The finishing coat shall be applied with the highest declared thickness of the product. The key coat with the lowest organic content shall be applied if the key coat is mandatory for a group of finishing coats in end use application. If within one group of finishing coats 1 to 5 the use of key coat is only mandatory for some finishing coats two worst cases shall be determined, one with key coat and one without key coat. The decorative coat with the highest water permeation according to EN shall be applied if the decorative coat is mandatory for a group of finishing coats in end use application. If within one group of finishing coats 1 to 5 the use of decorative coat is only mandatory for some finishing coats two worst cases shall be determined, one with decorative coat and one without decorative coat. The system holder shall declare the maximum water absorption in kg/m² with an accuracy of 0, Water tightness Requirements to the durability of kits out of a design ETICS The durability of kits out of a design ETICS shall be assessed according to EN Table 1 Classes for water tightness of ETICS shows possible classes. For the worst case configuration(s) the following rules apply. Purely bonded test specimen: Choose the adhesive with the minimal surface coverage foreseen by the system holder and apply it with the foreseen minimal surface coverage. If more than one adhesive out of a design ETICS fulfils this rule, only one adhesive needs to be used for the test specimen. The thickness of the adhesive shall be in the range given by the system holder. Mechanical fixing devices are not used for the test specimen. 24

26 The test result is valid for any adhesive out of the design ETICS, for every foreseen adhesive thickness and surface coverage. The test result is valid for purely bonded kits, bonded kits with supplementary mechanical fixing devices and for mechanically fixed kits with supplementary adhesive. Purely mechanically fixed test specimen: Every mechanical fixing device product out of a design ETICS shall be tested with two test specimens. The first test specimen shall be prepared with the minimum number of mechanical fixing device products per m² foreseen by the system holder. The second test specimen shall be prepared with the maximum number of mechanical fixing device products per m² foreseen by the system holder. The test results are valid for purely mechanically fixed kits with the tested mechanical fixing device product. For EPS and MW insulation materials it is regarded that test results of an insulation thickness equal or higher than 80 mm will be sufficient for all insulation thicknesses. Choose the thermal insulation product which is supposed to cause the highest probability of failure in the test: a) For expanded polystyrene choose the product with the highest declared tensile strength perpendicular to the surface. b) For mineral wool boards choose the product with the lowest declared tensile strength perpendicular to the surface. Dual-density products are considered to perform better than onedensity products if providing the same tensile strength. c) Mineral wool lamella has to be tested separately. For all other thermal insulation materials the following rules apply: a) For cellular glass tests shall be performed with an insulation thickness of 80 mm or more. Choose the product with the lowest tensile strength perpendicular to the faces. Test results are valid for all insulation thicknesses. b) For expanded cork choose the product with the lowest declared tensile strength perpendicular to the surface and the highest insulation thickness intended by the system holder. c) For extruded polystyrene foam choose the product with the highest declared tensile strength and the highest insulation thickness intended by the system holder. d) For phenolic foam choose each product with the highest insulation thickness intended by the system holder. e) For rigid polyurethane foam choose each product with the highest insulation thickness intended by the system holder. f) For wood fibre choose the product with the lowest declared tensile strength perpendicular to the surface and the highest insulation thickness intended by the system holder. g) For wood wool choose each product and every declared thickness. Test results of thermal insulation products from b) to g) are valid for all lower thicknesses. The base coat shall be tested according to the Figure 5 (Choice of base coat thickness). See chapter for definition of inorganic and organic base coat. 25

27 Figure 5 Choice of base coat thickness For glass fibre mesh the product with the lowest tensile strength after conditioning in aggressive medium according to EN shall be used. For metal mesh each product type defined by metal type, mesh size and thickness of the wire shall be tested. The finishing layer shall be chosen according to the Figure 6 (Choice of finishing layer). 26

28 Figure 6 Choice of finishing layer After hygrothermal conditioning according EN the following defects shall not occur: delamination, blistering or peeling of reinforced base coat or rendering system; failure or cracks associated with joints between insulation products; cracks with a width of more than 0,2 mm. If the test is passed, the resulting class according to table 1 depends only on the chosen test cycles. 27

29 Table 1 Classes for water tightness of kits out of design ETICS Class Hygrothermal test cycles C1 C2 C3 heating and wetting heating and wetting + heating and cooling heating and wetting + heating and cooling + wetting, freezing and thawing The higher classes include the lower one(s) Requirements to the bond strength of the base coat and finishing coat The bond strength of the base coat to the thermal insulation product and of the rendering system to the thermal insulation product shall be determined in accordance with EN after hygrothermal conditioning according to EN Each single test result shall be greater than or equal to 80 kpa or shall show cohesion fracture in the thermal insulation product. ((What appears in the DOP?)) Impact resistance Impact resistance of a kit shall be determined in accordance with EN after hygrothermal conditioning according EN No test result shall be less than the requirement given in table 2 (Levels of resistance to impact) for the declared level. Table 2 Levels of resistance to impact Level Requirement I0 I3 I10 None No damage a at 3 J No damage a at 10 J a No delamination and/or no cracks with a width greater than 0,2 mm penetrating to the thermal insulation product. Finishing coats not exposed to hygrothermal conditioning according to EN shall be tested according to EN on specimens with a minimum size of 500 mm x 200 mm x 60 mm after conditioning according to EN The recommended size is 500 mm x 500 mm x 60 mm. A specimen consists of one insulation product, one reinforced base coat and one finishing layer. Test results are only valid for the tested configuration and the chosen layer thicknesses of the base coat and the finishing coat. For a finishing coat according to EN or according to EN test results are valid for all higher layer thicknesses of the tested finishing coat. 28

30 6.2.5 Water vapour permeability The water vapour permeability of the base coat, the finishing coat and the thermal insulation product shall be declared separately. This shall be done either by tabulated values given in EN ISO or by measured values according to EN for the thermal insulation product and according to EN ISO 7783 for the reinforced base coat and the finishing coat. The accumulated water vapour condensation in the wall or in the assembled kit can be calculated in accordance with EN ISO 13788, considering the construction of the wall and the climate Release of dangerous substances National regulations on dangerous substances may require verification and declaration on release, and sometimes content, when construction products covered by this standard are placed on those markets. In the absence of European harmonized test methods, verification and declaration on release/content should be done taking into account national provisions in the place of use. NOTE 1 An informative database covering European and national provisions on dangerous substances is available at the Construction web site on EUROPA accessed through: NOTE 2 See EOTA Technical Report Fixing strength for mechanically fixed kits with supplementary adhesive Kits fixed with plate anchors and supplementary adhesive to the substrate The supplementary adhesive supports the thermal insulation product in the area where anchors are placed. The adhesive has to cover at least 40 % of each insulation plate. For kits fixed with plate anchors through the thermal insulation product the characteristic pull-through resistance Fk of an anchor shall be determined by pull-through-tests according to EN The possible test setups of the plate anchor setting positions are given in EN for middle area a, joint j (valid for T-joint and I- joint) and edge/corner ec (valid for corner and edge). These areas are shown in Figure 7 (Anchor scheme). The supplementary adhesive may not fulfil the requirements according to clause

31 Key a Middle area position ec Edge/corner position j Joint position r Distance determined according to EN c Distance determined according to EN Middle area position a: Figure 7 Anchor schema An anchor is set in the middle area of a thermal insulation product, if the distance between the centre of the anchor sleeve and the closest edge is larger than r or (the thickness of the tested thermal insulation product + plate radius of the tested anchor), whichever is the greatest. r is determined according to EN Edge/corner position ec: The edge/corner position is defined by the distance c (with c < r) between the centre of the anchor sleeve to the closest edge of the insulation product. c shall be given by the system holder and be considered for the test specimens according to EN Joint position j: The joint position is given, if the centre of the anchor sleeve is set in an I-joint or a T-joint formed by adjacent thermal insulation products. 30

32 Minimum distance between anchors: The minimum distance between the center of two anchors sleeves shall be at least [2 r] or [2 x (thickness of tested thermal insulation product + plate radius of the tested anchor)], whichever is the greatest. Characteristic pull through resistance: The characteristic pull-through resistance F k shall be calculated with the test results according to EN and the scaling factor C l. The scaling factor C l considers the relation between a declared tensile strength perpendicular to the surface TR of the thermal insulation product and the measured tensile strength perpendicular to the surface σ mt of the thermal insulation test sample according to EN The scaling factor C l = TR / σ mt is always less or equal than 1. = % (2) F k F 5% C l characteristic pull-through resistance of a single plate anchor, in kn; 5%-quantile of the pull-through resistance according EN in kn Scaling factor of the thermal insulation product Related to the anchor setting positions: F k,a characteristic pull-through resistance of a single plate anchor in the middle area position of a thermal insulation product in kn; F k,j characteristic pull-through resistance of a single plate anchor at the joint position (T-Joint or I- Joint) of a thermal insulation product, in kn F k,ec characteristic pull-through resistance of a single plate anchor at the edge/corner position of a thermal insulation product, in kn F k is valid for the tested and greater thicknesses of the thermal insulation product. For homogeneous thermal insulation products of the same type, F k is valid for the tested and greater declared tensile strength of the thermal insulation product. F k is valid for plate anchor products with the same plate diameter and the same or greater declared plate stiffness than the plate anchor product used in the test. Calculation of the required number of anchors per square meter under wind load suction: The design wind load resistance W d of a kit shall be greater or equal than the design wind load suction Sd. The pull out resistance of an anchor from the substrate F pull out may be less than F k. This is considered in Formula (4). 31

33 W d s d = (3) F F k, a pull out F F, pull out Fk, j F k ec pull W d = na min ; + nec min ; + n j min ; γ m γ d γ m γ d γ m γ d out (4) Safety factor for pull out relevant? Where S d S k S m W d n a n j n ec design wind load suction, in Kilopascal; characteristic wind load suction, in Kilopascal; partial safety factor for the design wind load suction; safety factor pull-through. For calculation see annex XXX design wind load resistance of the kit, in Kilopascal; number of anchors per square metre placed on the middle area position of the thermal insulation product; number of anchors per square metre placed at the joint position (T-joints and I-joints) of the thermal insulation product per square metre; number of anchors placed at the edge/corner position of the thermal insulation product per square metre; F pull out pull out resistance of an anchor out of the substrate. F k,ec may be used instead of F k,a and F k,j may be used instead of F k,ec and/or F k,a for calculation of W d. The result is in any case conservative. The partial safety factor S for the design wind load suction S d according to EN 1990 shall be equal or greater than 1,5. (Additional chapter for regulating ETICS fixed with plate anchors through the reinforcement necessary) (Also for the other types of fixing method of ETICS) For ETICS fixed with supplementary adhesive, plate anchors through reinforcement and thermal insulation product the characteristic pull-through resistance F k of an anchor shall be determined by testing with the static foam block test according to EN