This European Standard specifies the requirements for blown loose-fill mineral wool products for in-situ installation in lofts, masonry cavity walls and frame constructions. This Part 1 of this standard is a specification for the insulation products before installation. Part 1 of this European Standard describes the product characteristics and includes procedures for testing, marking and labelling. This standard does not specify the required level of a given property to be achieved by a product to demonstrate fitness for purpose in a particular application. The levels required for a given application are to be found in regulations or non-conflicting standards. NOTE To avoid water penetration in masonry walls special tests adjusted to local climate might be needed. Products with a declared thermal resistance lower than 0,25 m2-K/W or a declared thermal conductivity greater than 0,060 Wm/(m-K) at 10 °C are not covered by this standard. This standard does not cover products intended for airborne sound insulation and for acoustic absorption applications.