SIST EN 12939:2001
(Main)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
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
This standard gives the procedures to determine the thermal resistance of products the thicknesses of which exceed the maximum thickness for guarded hot plate or heat flow meter apparatus. In any case most of the procedures described in this standard require apparatus that allows tests on specimens up to 100 mm thick. This standard gives guidelines to assess the relevance of the thickness effect, i.e. to establish whether the thermal resistance of a thick product can or cannot be calculated as the sum of the thermal resistances of slices cut from the product, these guidelines complement the indications given in ISO 8302:1991 on the guarded hot plate apparatus.This standard describes testing conditions which prevent the onset of convection. which could take place in some products under the considered temperature differences and thicknesses.
Wärmetechnisches Verhalten von Baustoffen und Bauprodukten - Bestimmung des Wärmedurchlasswiderstandes nach dem Verfahren mit dem Plattengerät und dem Wärmestrommessplatten-Gerät - Dicke Produkte mit hohem und mittlerem Wärmedurchlasswiderstand
Diese Norm enthält die Verfahren zur Ermittlung des Wärmedurchlasswiderstandes von Produkten bei Dicken, die den in EN 12667 festgelegten Höchstwert für das Plattengerät oder Wärmestrommessplatten-Gerät überschreiten. Bei den meisten Verfahren dieser Norm wird angenommen, dass die Prüfungen an Probekörpern mit einer Dicke bis zu 100 mm durchgeführt werden. In dieser Norm sind Leitlinien zu finden, mit denen der Einfluss der Dicke bewertet werden kann, d. h. um feststellen zu können, ob der Wärmedurchlasswiderstand eines dicken Produktes durch Addition der Wärmedurchlasswiderstände von Scheiben, die vom Produkt geschnitten werden, berechnet werden kann oder ob dies nicht möglich ist. Diese Leitlinien sind eine Ergänzung zu den in ISO 8302:1991 für das Heizplattengerät angegebenen Hinweisen. Die Norm beschreibt Prüfbedingungen, die verhindern, dass sich die Konvektion einsetzt, was bei den betrachteten Temperaturdifferenzen und Dicken in einigen Produkten auftreten könnte.
Performance thermique des matériaux et produits pour le bâtiment - Détermination de la résistance thermique par la méthode de la plaque chaude gardée et la méthode fluxmétrique - Produits épais de haute et moyenne résistance thermique
La présente norme donne les modes opératoires permettant de déterminer la résistance thermique de produits ayant une épaisseur supérieure à la valeur maximale pour un appareil à plaque chaude gardée ou à fluxmètre. Dans tous les cas la plupart des modes opératoires décrits dans la présente norme nécessitent des appareils permettant l'essai d'éprouvettes dont l'épaisseur peut atteindre 100 mm. La présente norme fournit des indications pour évaluer la pertinence de l'effet d'épaisseur, c'est-à-dire pour établir si la résistance thermique d'un produit épais peut ou non être calculée en additionnant les résistances thermiques de tranches découpées dans le produit, ces indications sont complémentaires à celles données dans l'ISO 8302 :1991 sur l'appareil à plaque chaude gardée.
La présente norme décrit des conditions d'essai qui permettent d'éviter le développement de la convection, qui se pourrait se produire avec certains produits aux différences de température et aux épaisseurs considérées.
Toplotne značilnosti gradbenih materialov in proizvodov - Ugotavljanje toplotne upornosti s ščiteno ploščno napravo in z napravo z merilniki gostote toplotnega toka - Izdelki velike debeline z visoko ali srednje visoko toplotno upornostjo
General Information
- Status
- Published
- Publication Date
- 31-Aug-2001
- Technical Committee
- TOP - Thermal insulation
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Sep-2001
- Due Date
- 01-Sep-2001
- Completion Date
- 01-Sep-2001
- Directive
- 89/106/EEC - Construction products
Relations
- Effective Date
- 28-Oct-2020
Overview
EN 12939:2000 (CEN) specifies procedures for determining the thermal resistance of thick building materials and products using the guarded hot plate and heat flow meter methods. It applies to products whose thicknesses exceed the usual maximum for standard test apparatus; many procedures in the standard assume testing capability for specimens up to 100 mm thick. The standard focuses on thick products of high and medium thermal resistance and complements the guidance in ISO 8302:1991 for guarded hot plate testing.
Key Topics and Requirements
- Test methods covered
- Guarded hot plate method
- Heat flow meter (fluxmeter) method
- Specimen thickness
- Procedures for products thicker than conventional apparatus limits
- Most methods assume apparatus capable of testing up to 100 mm specimens
- Thickness effect assessment
- Guidelines to determine whether the thermal resistance of a thick product can be approximated by summing resistances of slices cut from the product (slice method)
- Criteria to assess when slice-based calculations are valid or when full-thickness testing is required
- Convection prevention
- Test conditions and setup recommendations to prevent natural convection that could occur in porous or thick materials under certain temperature differences and thicknesses
- Test environment and relevance
- Practical considerations to ensure representative thermal performance results for building applications
- Complementary references to ISO 8302 for guarded hot plate apparatus specifics
Applications
EN 12939 is intended for professionals who need reliable thermal-resistance data for thick insulating and building materials:
- Manufacturers of insulation boards, blocks, composite panels, and high-resistance materials-use the standard for product characterization and quality control
- Independent test laboratories-implement procedures for compliance testing and certification
- Building physicists and designers-use measured thermal resistance values for hygrothermal modeling, energy performance calculations, and specification writing
- R&D teams-evaluate material improvements and validate full-thickness thermal behavior versus sliced-sample approximations
Related Standards
- ISO 8302:1991 - Guarded hot plate apparatus and general guarded hot plate guidance (complementary)
- Other CEN/ISO standards on thermal conductivity and insulation testing may be used alongside EN 12939 for full assessment and reporting
EN 12939:2000 helps ensure accurate, repeatable measurement of thermal resistance for thick, high- and medium-resistance products-critical for energy-efficient building design, compliance, and material development.
Frequently Asked Questions
SIST EN 12939:2001 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "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". This standard covers: This standard gives the procedures to determine the thermal resistance of products the thicknesses of which exceed the maximum thickness for guarded hot plate or heat flow meter apparatus. In any case most of the procedures described in this standard require apparatus that allows tests on specimens up to 100 mm thick. This standard gives guidelines to assess the relevance of the thickness effect, i.e. to establish whether the thermal resistance of a thick product can or cannot be calculated as the sum of the thermal resistances of slices cut from the product, these guidelines complement the indications given in ISO 8302:1991 on the guarded hot plate apparatus.This standard describes testing conditions which prevent the onset of convection. which could take place in some products under the considered temperature differences and thicknesses.
This standard gives the procedures to determine the thermal resistance of products the thicknesses of which exceed the maximum thickness for guarded hot plate or heat flow meter apparatus. In any case most of the procedures described in this standard require apparatus that allows tests on specimens up to 100 mm thick. This standard gives guidelines to assess the relevance of the thickness effect, i.e. to establish whether the thermal resistance of a thick product can or cannot be calculated as the sum of the thermal resistances of slices cut from the product, these guidelines complement the indications given in ISO 8302:1991 on the guarded hot plate apparatus.This standard describes testing conditions which prevent the onset of convection. which could take place in some products under the considered temperature differences and thicknesses.
SIST EN 12939:2001 is classified under the following ICS (International Classification for Standards) categories: 91.100.60 - Thermal and sound insulating materials. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 12939:2001 has the following relationships with other standards: It is inter standard links to oSIST prEN 12939:2025. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN 12939:2001 is associated with the following European legislation: EU Directives/Regulations: 305/2011, 89/106/EEC. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Wärmetechnisches Verhalten von Baustoffen und Bauprodukten - Bestimmung des Wärmedurchlasswiderstandes nach dem Verfahren mit dem Plattengerät und demWärmestrommessplatten-Gerät - Dicke Produkte mit hohem und mittlerem WärmedurchlasswiderstandPerformance thermique des matériaux et produits pour le bâtiment - Détermination de la résistance thermique par la méthode de la plaque chaude gardée et la méthode fluxmétrique- Produits épais de haute et moyenne résistance thermiqueThermal 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 resistance91.100.60Thermal and sound insulating materialsICS:Ta s
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SIST EN 12939:2001は、建材および製品の熱性能を評価するための重要な基準であり、特に高いおよび中程度の熱抵抗を持つ厚い製品に焦点を当てています。この標準は、ガードホットプレートおよび熱フローメーター法を用いた熱抵抗の測定手順を提供しており、厚さが最大限度を超える製品のテスト手法を明確に定義しています。 この基準の大きな強みは、厚さ100mmまでの試験に対応できる装置が必要であることを認識した上で、熱抵抗の計算における厚さの影響を評価するためのガイドラインを提供している点です。これにより、厚い製品の熱抵抗を切り出したスライスの熱抵抗の合計として計算できるかどうかを判断する助けとなります。また、この基準は、ISO 8302:1991で示されたガードホットプレート装置に関する指示を補完するものでもあります。 さらには、熱的条件を詳細に規定しており、特定の温度差や厚さにおいて製品内部での対流の発生を防ぐためのテスト条件を整備しています。これにより、測定の精度が向上し、信頼性の高いデータを得ることが可能になります。 SIST EN 12939:2001は、分野ごとの適用性が高く、高熱抵抗材料の選定および設計において非常に重要な役割を果たしています。これにより、建築物のエネルギー効率を最大化し、持続可能な建築を促進するための道筋を示すことができます。このように、強力な基準を提供することが、建材業界における熱性能の理解と応用にとって不可欠であることは明白です。
SIST EN 12939:2001 표준은 건축 자재 및 제품의 열 성능을 평가하기 위한 중요한 문서로, 특히 두꺼운 제품의 열 저항을 측정하는 데 중점을 두고 있다. 이 표준의 주요 범위는 가드 핫 플레이트 및 열 흐름 미터 방법을 이용하여, 두께가 100 mm를 초과하는 제품의 열 저항을 결정하는 절차를 규정하고 있다. 이 표준의 장점 중 하나는 두께 효과의 관련성을 평가할 수 있는 지침을 제공한다는 점이다. 즉, 두꺼운 제품의 열 저항을 잘라낸 조각들의 열 저항의 합으로 계산할 수 있는지 여부를 결정할 수 있도록 도와준다. 이러한 지침은 ISO 8302:1991에서 제공하는 가드 핫 플레이트 장비에 대한 지침을 보완한다. 또한, SIST EN 12939:2001은 특정 온도 차와 두께에서 발생할 수 있는 대류의 시작을 방지하는 검사 조건을 명확히 설명하고 있다. 이는 신뢰할 수 있는 테스트 결과를 보장하여 건축 자재의 열 성능 평가의 정확성을 높인다. 결론적으로, SIST EN 12939:2001 표준은 두꺼운 제품의 열 저항 간극을 명확히 하고, 건축 자재의 열 성능을 신뢰성 있게 측정할 수 있는 방법론을 제시함으로써, 관련 산업에 큰 기여를 하고 있다.
The SIST EN 12939:2001 standard provides a comprehensive framework for determining the thermal resistance of building materials and products, particularly those that exceed the conventional thickness limits for widely used testing methods such as the guarded hot plate and heat flow meter. This standard is especially relevant for professionals involved in the assessment of high and medium thermal resistance materials, ensuring that accurate thermal performance metrics can be obtained even for thicker products. One of the significant strengths of this standard is its detailed procedures tailored for materials with thicknesses that can reach up to 100 mm. By accommodating such thicknesses, it allows for a broader application in various construction and materials engineering contexts, addressing a considerable gap in existing methodologies. The guidelines incorporated within the document offer valuable insights into assessing the thickness effect, which is crucial for determining whether the thermal resistance can be reliably calculated as a sum of the resistances from smaller samples. This is an essential aspect for achieving accuracy in thermal performance evaluations. Furthermore, the standard ensures that testing conditions are meticulously designed to prevent convection, which can skew results when testing thick products. By doing so, it enhances the reliability of thermal resistance data under specified temperature differences, making it an important reference for ensuring compliance and quality in building materials. In summary, SIST EN 12939:2001 is highly relevant for those in the construction and material sciences sectors, providing robust methodologies and guidelines that enhance the understanding and measurement of thermal resistance in thicker building products. Its strengths lie in its comprehensive procedural framework, focus on preventing convection during testing, and its ability to evaluate the thermal properties of complex materials, making it a key resource for industry professionals.
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