Abstract: A roofing membrane, includes at least one support layer and a plurality of strips arranged in spaced-apart disposition at least on one side of the support layer and made of bituminous material and have a penetration depth between about 120 and 170 at a temperature of 50° C., and a softening point between about 100° C. and 110° C. The strips of bituminous material are separated from one another by a layer of scattered material and are covered by a fusible film. The film is composed of a plurality of strips which are oriented in parallel relationship to the bituminous strips but not interconnected.

Abstract: A roofing membrane, includes at least one support layer and a plurality of strips arranged in spaced-apart disposition at least on one side of the support layer and made of bituminous material and have a penetration depth between about 120 and 170 at a temperature of 50° C., and a softening point between about 100° C. and 110° C. The strips of bituminous material are separated from one another by a layer of scattered material and are covered by a fusible film. The film is composed of a plurality of strips which are oriented in parallel relationship to the bituminous strips but not interconnected.

Abstract: A roofing membrane, includes a bottom layer of meltable non-woven plastic or other meltable plastic layer, a first layer made of bitumen, in particular elastomeric bitumen, a carrier sheet made of non-woven or fabric having tensile strength, a second layer made of bitumen, in particular elastomeric bitumen, a top layer having a marginal area suitable for welding to an overlapping marginal area of a bottom layer of a following second such roofing membrane, a bitumen strip exhibiting self-sticking properties in cold condition and positioned at the marginal area of at least the bottom layer or the top layer, and a peel-off film placed over the bitumen strip before laying of the roofing membrane.