SIST EN 13171:2013
(Main)Thermal insulation products for buildings - Factory made wood fibre (WF) products - Specification
Thermal insulation products for buildings - Factory made wood fibre (WF) products - Specification
This European Standard specifies the requirements for factory made wood fibre (WF) products, with or without facings or coatings, which are used for the thermal insulation of buildings1). The products are manufactured in the form of rolls, batts, felts, boards or slabs. Products covered by this standard are also used in prefabricated thermal insulation systems and composite panels; the performance of systems incorporating these products is not covered. This standard describes product characteristics and includes procedures for testing, evaluation of conformity, marking and labelling. This standard does not specify the required level of a given property to be achieved by a product to demonstrate fitness for purpose in a particular application. The classes and levels required for a given application are to be found in regulations or non-conflicting standards. Products with a declared thermal resistance lower than 0,20 m² .K/W or a declared thermal conductivity greater than 0,070 W/(m.K) at 10°C are not covered by this standard. This standard does not cover in situ insulation products and products intended to be used for the insulation of building equipment and industrial installations.
Wärmedämmstoffe für Gebäude - Werksmäßig hergestellte Produkte aus Holzfasern (WF) - Spezifikation
Diese Europäische Norm legt die Anforderungen an werkmäßig hergestellte Produkte aus Holzfasern (WF) mit oder ohne Kaschierung oder Beschichtung fest, die für die Wärmedämmung von Gebäuden benutzt werden ). Die Produkte werden in Form von Rollen, Formstücken, Filzen oder Platten hergestellt.
Die vorliegende Norm schließt mehrlagige Dämmstoffe aus Holzfasern ein. Die Anweisungen in Anhang C sind zu befolgen.
Die in dieser Norm beschriebenen Produkte werden auch in vorgefertigten Wärmedämmsystemen und Mehrschicht Verbundplatten angewendet. Die Eigenschaften von Systemen, in die diese Produkte integriert sind, werden nicht behandelt.
Die vorliegende Norm beschreibt die Produkteigenschaften und enthält die Prüfverfahren und Festlegungen für die Konformitätsbewertung, die Kennzeichnung und die Etikettierung.
Diese Norm legt keine Leistungsstufen für eine vorgegebene Eigenschaft fest, die ein Produkt erreichen muss, um für einen bestimmten Anwendungsfall tauglich zu sein. Die für bestimmte Anwendungen benötigten Klassen und Stufen können Regelwerken oder übereinstimmenden Normen entnommen werden.
Diese Norm gilt nicht für Produkte, deren Nennwert des Wärmedurchlasswiderstandes niedriger als 0,20 m2K/W oder deren Nennwert der Wärmeleitfähigkeit größer als 0,070 W/(mK) bei 10 °C ist.
Die vorliegende Norm gilt weder für in situ Dämmstoffe noch für Produkte, die zur Dämmung von haus-technischen und betriebstechnischen Anlagen bestimmt sind.
Produits isolants thermiques pour le batiment - Produits manufacturés en fibres de bois (WF) - Spécification
La présente Norme européenne spécifie les exigences auxquelles doivent satisfaire les produits manufacturés en fibres de bois, avec ou sans parements ou enduits de finition, utilisés pour l'isolation thermique des bâtiments ). Les produits sont fabriqués sous forme de rouleaux, bandes, feutres, panneaux ou plaques.
Les produits couverts par la présente norme sont également utilisés dans des systèmes d'isolation thermique et dans des panneaux composites préfabriqués ; les performances des systèmes incorporant ces produits ne sont pas définies.
La présente norme décrit les caractéristiques des produits et contient des modes opératoires d'essai, d'évaluation de la conformité, de marquage et d'étiquetage.
La présente norme ne spécifie pas, pour une propriété donnée, le niveau exigé que doit atteindre un produit pour démontrer son aptitude à l'emploi dans une application particulière. Les classes et niveaux requis pour une application donnée figurent dans les réglementations ou normes non conflictuelles.
Les produits dont la résistance thermique déclarée à une température de 10 °C est inférieure à 0,20 m2×K/W ou dont la conductivité thermique déclarée à une température de 10 °C est supérieure à 0,070 W/(m×K) ne relèvent pas du domaine d'application de la présente norme.
Les produits isolants mis en oeuvre in situ et les produits destinés à être utilisés pour l'isolation des équipements du bâtiment et des installations industrielles ne relèvent pas du domaine d'application de la présente norme.
Toplotnoizolacijski proizvodi za stavbe - Proizvodi iz lesnih vlaken (WF) - Specifikacija
Ta evropski standard določa zahteve za površinsko obdelane ali lakirane ali površinsko neobdelane ali nelakirane proizvode iz lesnih vlaken (WF), ki se uporabljajo za toplotno izolacijo stavb. Proizvodi so izdelani v obliki kolutov, kopren, polstov, plošč ali blokov. Proizvodi iz tega standarda se uporabljajo tudi v predizdelanih sistemih toplotne izolacije in vezanih ploščah; lastnosti sistemov iz teh proizvodov niso opisane. Ta standard opisuje lastnosti proizvodov ter zajema postopke za preskušanje, vrednotenje skladnosti, označevanje in etiketiranje. Ta standard ne določa zahtevane ravni določene lastnosti, ki jo mora proizvod doseči, da se dokaže njegova primernost namenu za posamezno vrsto uporabe. Zahtevani razredi in ravni za posamezno uporabo so določeni v uredbah ali standardih, ki niso v nasprotju s tem standardom. Proizvodi z deklarirano toplotno upornostjo, nižjo od 0,20 m² K/W, ali deklarirano toplotno prevodnostjo, višjo od 0,070 W/mK pri 10 °C, v tem evropskem standardu niso zajeti. Ta standard ne zajema toplotnoizolacijskih proizvodov, izdelanih na kraju samem, ter proizvodov za izolacijo gradbene opreme in industrijskih napeljav.
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Toplotnoizolacijski proizvodi za stavbe - Proizvodi iz lesnih vlaken (WF) - SpecifikacijaWärmedämmstoffe für Gebäude - Werksmäßig hergestellte Produkte aus Holzfasern (WF) - SpezifikationProduits isolants thermiques pour le batiment - Produits manufacturés en fibres de bois (WF) - SpécificationThermal insulation products for buildings - Factory made wood fibre (WF) products - Specification91.100.60Thermal and sound insulating materialsICS:Ta slovenski standard je istoveten z:EN 13171:2012SIST EN 13171:2013en,fr,de01-marec-2013SIST EN 13171:2013SLOVENSKI
STANDARD
SIST EN 13171:2013
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 13171
November 2012 ICS 91.100.60 Supersedes EN 13171:2008English Version
Thermal insulation products for buildings - Factory made wood fibre (WF) products - Specification
Produits isolants thermiques pour le bâtiment - Produits manufacturés en fibres de bois (WF) - Spécification
Wärmedämmstoffe für Gebäude - Werksmäßig hergestellte Produkte aus Holzfasern (WF) - Spezifikation This European Standard was approved by CEN on 6 October 2012.
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 references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre 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 into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13171:2012: ESIST EN 13171:2013
EN 13171:2012 (E) 2 Contents Page Foreword .41Scope .62Normative references .63Terms, definitions, symbols, units and abbreviated terms .83.1Terms and definitions .83.2Symbols, units and abbreviated terms .84Requirements . 114.1General . 114.2For all applications . 114.3For specific applications . 135Test methods . 195.1Sampling . 195.2Conditioning . 195.3Testing . 196Designation code . 227Evaluation of conformity . 237.1General . 237.2Initial type testing . 247.3Factory production control . 248Marking and labelling . 24Annex A (normative)
Determination of the declared values of thermal resistance and thermal conductivity . 25A.1General . 25A.2Input data . 25A.3Declared values. 25A.3.1General . 25A.3.2Case where thermal resistance and thermal conductivity are declared . 25A.3.3Case where only thermal resistance is declared . 26Annex B (normative)
Initial type testing (ITT) and factory production control (FPC) . 28Annex C (normative)
WF multi-layered thermal insulation products . 31C.1General . 31C.2Requirements . 31C.2.1For all applications . 31C.2.2For specific applications . 32C.3Test methods . 32C.4Evaluation of conformity . 32Annex D (normative)
Determination of the thermal conductivity in relation to moisture content . 33Annex E (informative)
Additional properties . 35E.1General . 35E.2Bending strength . 35E.3Shear strength . 35Annex F (informative)
Examples for the determination of the declared values of thermal resistance and thermal conductivity for a product or a product group . 36F.1Case where both thermal resistance and thermal conductivity are declared . 36F.2Case where only thermal resistance is declared . 37SIST EN 13171:2013
EN 13171:2012 (E) 3 Annex ZA (informative)
Clauses of this European Standard addressing the provisions of the EU Construction Products Directive . 39ZA.1Scope and relevant characteristics . 39ZA.2Procedures for attestation of conformity of factory made wood fibre products . 41ZA.2.1Systems of attestation of conformity . 41ZA.2.2EC certificate and declaration of conformity . 44ZA.3CE Marking and labelling . 46Bibliography . 48 Tables Table 1 — Level and classes for thickness tolerances . 12Table 2 — Dimensional stability under specified temperature and humidity conditions . 13Table 3 — Levels for compressive stress or compressive strength . 14Table 4 — Levels for tensile strength perpendicular to faces . 15Table 5 — Levels for short term water absorption by partial immersion . 16Table 6 — Classes for thickness tolerances . 17Table 7 — Levels for compressibility . 17Table 8 — Test methods, test specimens and conditions . 21Table A.1 — Values for k for one sided 90 % tolerance interval with a confidence level of 90 % . 27Table B.1 — Minimum number of tests for ITT and minimum product testing frequencies . 28Table B.3 — Minimum product testing frequencies for the reaction to fire characteristics . 30Table E.1 — Test methods, test specimens, conditions and minimum testing frequencies . 35Table F.1 — λ test results . 36Table F.2 — R test results . 37Table ZA.1 — Relevant clauses for wood fibre products and intended use . 40Table ZA.1 — Relevant clauses for wood fibre products and intended use . 41Table ZA.2 — Systems of attestation of conformity . 42Table ZA.3.1 — Assignment of evaluation of conformity tasks for products under system 1 for reaction to fire and system 3 for other characteristics . 43Table ZA.3.2 — Assignment of evaluation of conformity tasks for products under system 3 or
system 3 combined with system 4 for reaction to fire . 44 Figures Figure D.1 — Example of a graphic representation of “fψ” . 34Figure ZA.1 — Example CE marking information . 47 SIST EN 13171:2013
EN 13171:2012 (E) 4 Foreword This document (EN 13171:2012) has been prepared by Technical Committee CEN/TC 88 “Thermal insulating materials and products”, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2013, and conflicting national standards shall be withdrawn at the latest by May 2013. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document. This document supersedes EN 13171:2008. Compared with EN 13171:2008, the main changes are: a) better harmonisation between the individual standards of the package (EN 13162 to EN 13171) on definitions, requirements, classes and levels; b)
new normative annex on multi-layer products; c) changes of some editorial and technical content and addition of information on some specific items such as for WF: determination of thermal conductivity in relation to moisture content, thickness, compressive stress or compressive strength, tensile strength perpendicular to faces; d)
addition of links to EN 15715, Thermal insulation products – Instructions for mounting and fixing for reaction to fire testing – Factory made products; e)
changes of Annex ZA. This European Standard is one of a series of standards for insulation products used in buildings, but this standard may be used in other areas where appropriate. In pursuance of Resolution BT 20/1993 revised, CEN/TC 88 have proposed defining the standards listed below as a package of European Standards, setting 21 months after availability as the date of withdrawal (dow) of national standards which conflict with the European Standards of this package. The package of standards comprises the following group of interrelated standards for the specifications of factory made thermal insulation products, all of which come within the scope of CEN/TC 88: 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 EN 13164, Thermal insulation products for buildings — Factory made extruded polystyrene foam (XPS) products — Specification SIST EN 13171:2013
EN 13171:2012 (E) 5 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 13168, Thermal insulation products for buildings — Factory made wood wool (WW) products — Specification EN 13169, Thermal insulation products for buildings — Factory made expanded perlite board (EPB) products — Specification EN 13170, Thermal insulation products for buildings — Factory made products of expanded cork (ICB) — Specification EN 13171, Thermal insulation products for buildings — Factory made wood fibre (WF) products — Specification The reduction in energy used and emissions produced during the installed life of insulation products exceeds by far the energy used and emissions made during the production and disposal processes.
According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
SIST EN 13171:2013
EN 13171:2012 (E) 6 1 Scope This European Standard specifies the requirements for factory made wood fibre (WF) products, with or without facings or coatings, which are used for the thermal insulation of buildings1). The products are manufactured in the form of rolls, batts, felts, boards or slabs. Products covered by this standard are also used in prefabricated thermal insulation systems and composite panels; the performance of systems incorporating these products is not covered. This standard describes product characteristics and includes procedures for testing, evaluation of conformity, marking and labelling. This standard does not specify the required level of a given property to be achieved by a product to demonstrate fitness for purpose in a particular application. The classes and levels required for a given application are to be found in regulations or non-conflicting standards. Products with a declared thermal resistance lower than 0,20 m2⋅K/W or a declared thermal conductivity greater than 0,070 W/(m⋅K) at 10 °C are not covered by this standard. This standard does not cover in situ insulation products and products intended to be used for the insulation of building equipment and industrial installations.
2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the 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 826, Thermal insulating products for building applications — Determination of compression behaviour EN 1602, Thermal insulating products for building applications — Determination of the apparent density EN 1603, Thermal insulating products for building applications — Determination of dimensional stability under constant normal laboratory conditions (23 °C/50 % relative humidity) EN 1604, Thermal insulating products for building applications — Determination of dimensional stability under specified temperature and humidity conditions EN 1606, Thermal insulating products for building applications — Determination of compressive creep EN 1607, Thermal insulating products for building applications — Determination of tensile strength perpendicular to faces
1) Wood fibre products for applications other than thermal insulation are covered by EN 316. SIST EN 13171:2013
EN 13171:2012 (E) 7 EN 1608, Thermal insulating products for building applications — Determination of tensile strength parallel to faces EN 1609, Thermal insulating products for building applications — Determination of short term water absorption by partial immersion EN 12086:1997, Thermal insulating products for building applications — Determination of water vapour transmission properties EN 12430, Thermal insulating products for building applications — Determination of behaviour under point load EN 12431, Thermal insulating products for building applications — Determination of thickness for floating floor insulation products EN 12667, Thermal performance of building materials and products — Determination of thermal resistance by means of guarded hot plate and heat flow meter methods — Products of high and medium thermal resistance EN 12939, Thermal performance of building materials and products — Determination of thermal resistance by means of guarded hot plate and heat flow meter methods — Thick products of high and medium thermal resistance EN 13172:2012, Thermal insulation products — Evaluation of conformity EN 13501-1, Fire classification of construction products and building elements — Part 1: Classification using data from reaction to fire tests EN 13823, Reaction to fire tests for building products — Building products excluding floorings exposed to the thermal attack by a single burning item EN 15715:2009, Thermal insulation products — Instructions for mounting and fixing for reaction to fire testing —Factory made products EN 29052-1, Acoustics — Determination of dynamic stiffness — Part 1: Materials used under floating floors in dwellings (ISO 9052-1) EN 29053, Acoustics — Materials for acoustical applications — Determination of air flow resistance
(ISO 9053) EN ISO 354, Acoustics — Measurement of sound absorption in a reverberation room (ISO 354) EN ISO 9229:2007, Thermal insulation - Vocabulary (ISO 9229:2007) EN ISO 10456:2007, Building materials and products — Hygrothermal properties —Tabulated design values and procedures for determining declared and design thermal values (ISO 10456:2007) EN ISO 11654, Acoustics — Sound absorbers for use in buildings — Rating of sound absorption (ISO 11654) EN ISO 11925-2, Reaction to fire tests — Ignitability of products subjected to direct impingement of flame — Part 2: Single-flame source test (ISO 11925-2) ISO 16269-6:2005, Statistical interpretation of data — Part 6: Determination of statistical tolerance intervals SIST EN 13171:2013
EN 13171:2012 (E) 8 3 Terms, definitions, symbols, units and abbreviated terms 3.1 Terms and definitions For the purposes of this document, the terms and definitions given in EN ISO 9229:2007 apply with exception or in addition of the following: 3.1.1 wood fibre products insulation product including bonded products manufactured from wood fibres with or without the addition of bonding agents and/or additives consisting of at least 80 % wood fibres per mass Note 1 to entry
Wood fibre products are manufactured as mat, batt, felt, roll, lamella roll and board (slab). 3.1.2 level value which is the upper or lower limit of a requirement and given by the declared value of the characteristic concerned 3.1.3 class combination of two levels of the same property between which the performance shall fall 3.1.4 board, slabs rigid or semi-rigid (insulation) product of rectangular shape and cross section in which the thickness is uniform and substantially smaller than the other dimensions Note 1 to entry
Boards are usually thinner than slabs. They may also be supplied in tapered form. 3.1.5 facings functional or decorative surface layer with a thickness of less than 3 mm, e.g. paper, plastics film, fabric or metal foil, which is not considered as separate thermal insulation layer to be added to the thermal resistance of the product 3.1.6 coating functional or decorative surface layer with a thickness of less than 3 mm usually applied by painting, spraying, pouring or trowelling 3.1.7 composite insulation product product which can be faced or coated made from two or more layers bonded together by chemical or physical adhesion consisting of at least one factory made thermal insulation material layer
3.1.8 multi-layered insulation product product which can be faced or coated made from two or more layers of a thermal insulation material from the same European Standard, which are bonded together horizontally by chemical or physical adhesion 3.2 Symbols, units and abbreviated terms For the purposes of this document, the following symbols and units apply. αp is the practical sound absorption coefficient – aw is the weighted sound absorption coefficient – SIST EN 13171:2013
EN 13171:2012 (E) 9 b is the width mm c is the compressibility
mm d is the thickness mm Fp is the compressive force at critical point kN dN is the nominal thickness mm dB is the thickness under a load of 2 kPa, after a short time load of 48 kPa mm dL is the thickness under a load of 250 kPa mm ∆εl is the relative change in length % ∆εb is the relative change in width % Ki is a factor related to the number of test results available – l is the length mm λ is the thermal conductivity W/(m K) λ90/90 is the 90 % fractile with a confidence level of 90 % for the thermal conductivity W/(m⋅K) λD is the declared thermal conductivity W/(m⋅K) λI is one test result of thermal conductivity W/(m⋅K) λmean is the mean thermal conductivity W/(m⋅K) λU is the design thermal conductivity W/(m⋅K) µ is the water vapour diffusion resistance factor – n is the number of test results – R90/90 is the 90 % fractile with a confidence level of 90 % for the thermal resistance m2⋅K/W RD is the declared thermal resistance m2⋅K/W Ri is one test result of thermal resistance m2⋅K/W Rmean is the mean thermal resistance m2⋅K/W RU is the design thermal resistance m2⋅K/W ρa is the apparent density kg/m3 Sb is the deviation from squareness on length and width mm/m Smax is the deviation from flatness mm sR is the estimate of the standard deviation of the thermal resistance m2⋅K/W sλ is the estimate of the standard deviation of the thermal conductivity W/(m⋅K) s’ is the dynamic stiffness MN/m3 σc is the declared compressive stress kpa σ10 is the compressive stress at 10 % deformation kPa σm is the compressive strength kPa σmt is the tensile strength perpendicular to faces kPa σt is the tensile strength parallel to faces kPa SIST EN 13171:2013
EN 13171:2012 (E) 10 2 Is the shear strength kPa Wp is the short-term water absorption kg/m2 X0 is the initial deformation after 60 s from the beginning of loading mm Xct is the compressive creep mm Xt is the deformation at time t (total thickness reduction) mm Z is the water vapour resistance m2⋅h⋅Pa/mg
AFr is the symbol of the declared level of airflow resistivity AP is the symbol of the declared level of practical sound absorption coefficient AW is the symbol of the declared level of weighted sound absorption coefficient CC(i1/i2/y)σc is the symbol of the declared level for long term compressive creep CP is the symbol of the declared level for compressibility CS(10\Y) is the symbol of the declared level for compressive stress or strength DS(N) is the symbol of the declared value for dimensional stability at normal laboratory temperature and relative humidity conditions DS(70,-) is the symbol of the declared value for dimensional stability at 70 °C DS(23/90) is the symbol of the declared value for dimensional stability at 23 °C and 90 % relative humidity DS(70/90) is the symbol of the declared value for dimensional stability at 70 °C and 90 % relative humidity MU is the symbol of the declared value for water vapour diffusion resistance factor PL(5) is the symbol for the declared level of point load for 5 mm deformation SD is the symbol of the declared level of dynamic stiffness T is the symbol of the declared class for thickness tolerances TRi is the symbol of the declared level for tensile strength perpendicular to faces WS is the symbol of the declared level for short term water absorption Z is the symbol of the declared value for water vapour resistance
Abbreviated terms used in this standard: WF is Wood Fibre ITT is Initial Type Test FPC is Factory Production Control RtF is Reaction to Fire SIST EN 13171:2013
EN 13171:2012 (E) 11 4 Requirements 4.1 General Product properties shall be assessed in accordance with Clause 5. To comply with this standard, products shall meet the requirements of 4.2, and the requirements of 4.3 as appropriate. For multi-layered products, additional requirements are given in Annex C. NOTE Information on additional properties is given in Annex E. One test result for a product property is the average of the measured values on the number of test specimens given in Table 8. 4.2 For all applications 4.2.1 Thermal resistance and thermal conductivity Thermal resistance and thermal conductivity shall be based upon measurements carried out in accordance with EN 12667 or EN 12939 for thick products and in accordance with 5.2, 5.3.2 and Annex D. The thermal resistance and thermal conductivity shall be determined in accordance with Annex A and declared by the manufacturer according to the following: the reference mean temperature shall be 10 °C; the declared values are to be given for a moisture content equal to the one the material has when equilibrium with the air at 23 °C and relative humidity 50 %; the measured values shall be expressed with three significant figures; for products of uniform thickness, the declared thermal resistance, RD, shall always be declared. The thermal conductivity, λD, s
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.