Asbestos encapsulation is a form of maintenance operation on the original roofing, performed by applying specific products which enable the fixing and sealing of the asbestos fibres contained in the structure. In addition to the efficacious fixing and coating of the asbestos fibres, the treatment also preserves and waterproofs the roof, prolonging its life for many years. The choice of the reclamation method is regulated by article 2 of the Italian Ministerial Decree D.M. 6/9/94.