This European Prestandard applies to building limes used as binders predominantly in mortar as masonry as well as for rendering and plastering and to limes for soil stabilisation. It gives a general definition of the different types of building limes and their classification. It also gives requirements for their chemical, mechanical and physical properties which depend on the type of building lime and specifies the manufacturer's autocontrol procedures to ensure conformity. Terms of delivery or other contractual conditions, normally included in documents exchanged between the supplier and the purchaser of lime, are outside the scope of this European Prestandard.