Abstract: A moisture and weather proofing membrane is disclosed, comprising a carrier layer having opposite top and under faces. A waterproof layer made of a waterproof material, preferably bitumen, is coating the top face of the carrier layer; and spaced self-adhesive bituminous pieces are bonded to the under face of the carrier layer, leaving therebetween interconnected spaces of uncoated carrier layer. The interconnected spaces act as bond breakers and thereby allow the diffusion of vapor pressure formed underneath the membrane once installed on a roof. A method for manufacturing such a membrane is also disclosed.