A dual waterproofing membrane assembly system for a structure, comprising: (a) at least one soil retention system (17, 37) having a first face and a second face, and wherein said first face faces compacted earth or soil; (b) at least one bentonite sheet waterproofing membrane layer (24, 25, 75) having a first face and a second face, and wherein at least a portion of said first face of said at least one bentonite sheet waterproofing membrane layer (24, 25, 75) is secured to at least a portion of said second face of said at least one soil retention system (17, 37), and said at least one bentonite sheet waterproofing membrane layer (24, 25, 75) is composed of a layer of a first material; (c) at least one waterproof sheet membrane layer having a first face and a second face, said at least one waterproof sheet membrane layer is composed of a layer of a second material, and wherein said second face of said at least one waterproof sheet membrane layer has at least one layer of at least one adhesive; wherein said first material is different than said second material, characterized in that at least a portion of said first face of said at least one waterproof sheet membrane layer is secured to at least a portion of said second face of said at least one bentonite sheet waterproofing membrane layer, so as to form said dual waterproofing membrane assembly system for a structure; wherein one of said at least one bentonite sheet waterproofing membrane (24, 25, 75), and said at least one waterproof sheet membrane layer extends along at least a portion of a vertical surface; and wherein one of said at least one bentonite sheet waterproofing membrane (24, 25, 75), and said at least one waterproof sheet membrane layer extends along at least a portion of a horizontal surface. (a) at least one soil retention system (17, 37) having a first face and a second face, and wherein said first face faces compacted earth or soil; (b) at least one bentonite sheet waterproofing membrane layer (24, 25, 75) having a first face and a second face, and wherein at least a portion of said first face of said at least one bentonite sheet waterproofing membrane layer (24, 25, 75) is secured to at least a portion of said second face of said at least one soil retention system (17, 37), and said at least one bentonite sheet waterproofing membrane layer (24, 25, 75) is composed of a layer of a first material; (c) at least one waterproof sheet membrane layer having a first face and a second face, said at least one waterproof sheet membrane layer is composed of a layer of a second material, and wherein said second face of said at least one waterproof sheet membrane layer has at least one layer of at least one adhesive; wherein said first material is different than said second material, characterized in that at least a portion of said first face of said at least one waterproof sheet membrane layer is secured to at least a portion of said second face of said at least one bentonite sheet waterproofing membrane layer, so as to form said dual waterproofing membrane assembly system for a structure; wherein one of said at least one bentonite sheet waterproofing membrane (24, 25, 75), and said at least one waterproof sheet membrane layer extends along at least a portion of a vertical surface; and wherein one of said at least one bentonite sheet waterproofing membrane (24, 25, 75), and said at least one waterproof sheet membrane layer extends along at least a portion of a horizontal surface.