This Technical Report provides details on the rules and recommendations for the installation of works carriedout using fibrous (gypsum) plaster casts as defined in European Standard EN 13815, with instructions anddetails about construction.Fibrous (gypsum) plaster casts from the three categories of production below (see 4.1 of EN 13815:2006)should be involved in this Technical Report:a) """"cpp"""" allowing regulatory marking CE,b) """"cppv"""" allowing regulatory marking CE,c) """"ipp"""" either when CE marking is required or without CE marking (see Annex D, note 2 of EN 13815:2006).There are three products:- traditional fibrous (gypsum) plaster casts, and