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This paper deals with the experimental evaluation of a roof-mountedmulti-reflective radiant barrier (MRRB), installed according to the state ofthe art, on a dedicated test cell. An existing experimental device wascompleted with a specific system for the regulation of the airflow rate in theupper air layer included in a typical roof from Reunion Island. Severalexperimental sequences were conducted to determine the thermal resistance ofthe roof according to several parameters and following a specific method. Themean method, well known in international standards (ISO 9869 - 1994) for thedetermination of the thermal resistance using dynamic data, was used. Themethod was implemented in a building simulation code in order to allow thedetermination of the thermal indicator automatically. Experimental results areproposed according to different seasonal periods and for different values ofthe airflow rate in the upper air layer.

Evaluation of the thermal resistance of a roof-mounted multi-reflective  radiant barrier for tropical and humid conditions: Experimental study from  field measurements