Standards Development
This document applies to the determination whether mineral wool insulating materials of classes A1 and A2 in accordance with EN 13501-1 in building components have sufficient resistance when exposed to fire at temperatures of at least 1 000 °C by assessing the change of the thickness of the material tested.
This document does not apply to the testing of mineral wool insulating materials under continuous thermal loading, e.g., to determine the maximum service temperature range as in EN 14706.
NOTE 1 If the mineral wool insulating materials meet the requirements specified for the assessment in the test method below after exposure to the standard-temperature-curve, then that is considered as proof of their form stability in case of fire / melting point being at least 1 000 °C.
NOTE 2 It is strictly pointed out, that in physical terms, the term “form stability in case of fire / melting point of at least 1 000 °C” does not refer to a specific melting point but to a temperature range within which the material softens.
Objective of the work is to create an EN test standard to assess the form stability of non-combustible insulating materials made of mineral wool (products of classes A1 and A2 according to EN 13501-1) in case of fire (also expressed as melting point > 1000 °C).
Within the CPR-Acquis process by the European Commission new standardization requests for harmonised product standards are under preparation in the context of Regulation (EU) 2024/3110 (Construction Products Regulation, CPR). These new standardization requests shall consider all essential characteristics that are legally required in Member States for the use of construction products on the basis of construction works regulation.
In order to address all necessary essential requirements in a standardisation request and subsequently in a comprehensive product standard, associated test methods standardised on a European level are a prerequisite. Moreover, representatives of the EC have clarified in discussions with CPR-Aquis sub-groups for certain product areas that the EC intends to consider in coming standardization requests only those essential characteristics announced by Member States for which harmonised European test standards already exist or at least, European test standards are under development.
One of the essential characteristics announced by Member States to be considered in coming product standards is the characteristic Melting point > 1000 °C / Form stability of non-combustible insulation products (products of classes A1 and A2 according to EN 13501-1) in case of fire. This characteristic is, for example, required in Germany in several regulations and technical standards for the use of non-combustible insulation products in fire-safety constructions in buildings (see Model Administrative Provisions – Technical Building Rules, notified in TRIS as 2021/348/D; 2021/265/D; 2020/358/D; 2019/306/D and Model Building Code, notified in TRIS as 2016/228/D; 2019/640/D). Unfortunately, no suitable test method for this characteristic exists on European or International level up to now. Insulation products impact reaching the goals of the European Green Deal. But their usability in construction works depends on a comprehensive and accurate declaration of performance, including the performance for the above-mentioned characteristic. Therefore, it is absolutely necessary to develop such European test method for the determination of this characteristic in order to avoid incomplete product standards resulting in a declaration of performance incapable to demonstrate fulfilling national requirements and hence resulting in barriers to trade
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