A liquid applied roof waterproofing kit based on epoxy resin. It is manufactured under the concept of continue system and is a multi-layers type, which is obtained by mean of impregnation “in situ” of fibre glass sheets with liquid epoxy resin. The kit, once polymerized, conforms an elastic lining, in form of a layer completely bonded to the support. The minimum layer thickness of the assembled membrane has to be 3 mm and the film accessible of 1 mm.