Thermal performance of building products and components - Specific criteria for the assessment of laboratories measuring heat transfer properties - Part 2: Measurements by guarded hot plate method

This document specifies a particular method for the laboratory evaluation of thermal exchange characteristics of building materials and components. It focuses on the heat transfer assessment within a controlled environment, providing detailed guidelines for the operation and calibration of specific measurement apparatus. The procedure outlined is designed to ensure accurate determination of thermal performance properties under steady-state conditions. By employing a guarded hot plate technique, this standard addresses the need for precise quantification of heat flow through test specimens. It establishes the necessary protocols for sample preparation, environmental control, and data interpretation to facilitate consistent results across different testing facilities. The approach described supports the evaluation of insulating materials and assemblies used in construction. It serves as a foundational reference for laboratories conducting compliance testing or research related to building energy efficiency. The methodology promotes reliability in measuring thermal conductivity and resistance, which are critical parameters for understanding the thermal behavior of structures. This technical specification is part of a broader series dedicated to the performance assessment of building elements.