<p>System for sealing roofing by means of two successive sealing layers, the first of which is mechanically fixed to the support and the second, self-adhering, is fixed to the first by cold self-bonding. …<??>The first sealing layer is made by means of sealing sheets constituted by the assembly of a bitumen-based sheet reinforced with a strength member and of a film of a polymer having a high tear strength.</p>
