This International Standard specifies the properties and acceptable tolerances for bonded man-made mineral wool board for the overdeck insulation of roofs of buildings. The product is intended for roofs carrying foot traffic by maintenance personnel only (for examples of intended used, see ISO/TR 9774, figure 1 sketches 7 and 9). The properties to be declared by the manufacturer at the time of delivery are specified, as are some test methods for the determination of these properties. Caution should be exercised in using test results as design values. This International Standard provides limiting values for most of the properties. These limiting values are for specification purposes only, design values may be derived from these by taking into account the environmental factors affecting the thermal performance of the product, the influence of the product properties on installation, and the effect of workmanship on the thermal performance. For converting declared R or ? values to design values, see, for example, ISO/TR 9165