It can be applied on an old flat and adherent covering that is still in good state but near the end of its lifetime. Where there are old waterproofing systems, both with or without thermal insulation, which are affected by minimum infiltration due to a very few cracks that are clearly visible and repaired in advance and that have not soaked, if not to a minor extent, the insulation panel, but perfectly flat, dry and free from signs of tensioning, you can consider refurbishing using certified membranes for single-layer flame-bonded applications shown in the figure at the side (max. pitch 40%). Treat the old covering with INDEVER or ECOVER primer before the application of the flame-bonded membrane.