Edifice sealing web, and process for manufacturing same

An edifice sealing web, comprising a sealing web facing away from the edifice and containing plasticizers, an adjoining barrier layer which extends on the side facing the edifice and is based on mixtures of homopolyamides and/or copolyamides, and a self-adhesive layer containing an oil adjoining the barrier layer directly,

• wherein the barrier layer comprises at least two layers, of which a first layer is a hot melt adhesive layer containing a copolyamide and a second layer is another layer containing a homopolyamide, wherein the first layer is bonded to the sealing web, and wherein the barrier layer prevents migration of the plasticizers from the sealing web and prevents migration of the oil from the self-adhesive layer,
• wherein the surface of the sealing web that is connected to the barrier layer which extends on the side facing the edifice has a roughness with Ra=2.5-10 μm, Rz=20-50 μm, and Rmax=25-65 μm, wherein Rmax=the maximum roughness depth, Ra=the arithmetic mean roughness value, Rz=the averaged roughness depth, and
• wherein the sealing web includes a base polymer, a polymeric softening agent based on an adipic acid polyester or sebacic acid polyester.