Mr. Eoin O'Dowd:

If we could separate what we term the components of a system versus a system built up itself, all components that are placed on buildings must be proper materials under parity of the building regulations. Under those requirements, we have a pan-European system of classification called the CE mark, for which many construction products, known as harmonised products, must meet and declare parts through its documentation before being placed on the market. We do have other methods of classification. When we refer to in the technical guidance document the reaction to fire classification, it is that classification of the individual components that make up the wall element.