Civil Engineering is a sector that moves within the macroscale. The use of Nanotextile requires an understanding of various phenomena on a basic level, i.e. in the micro and nano-scale. If we move in the macrocosm is the possible influence of some forces to neglect. However, the negligence for nanotextile is not possible. Software, which are used for calculations of diffusion properties of building materials do not provide for modelling the properties of membranes nanotextiles satisfactory results. The probable cause is negligence complex internal structure of these materials. Modelling of physical and chemical properties of nano-membranes is important for their successful use in various technological fields, including construction. As a suitable software seems Comsol MultiPhysic, since it is possible to model multiphysics happening, i.e. that can be added to the modelling include the forces acting on the micro and nano level (for example van der Waals forces). It is also possible to record the program structure and will create a pre e.g. in a text editor or AutoCAD and assign the material parameters.Keywords: COMSOL MultiPhysic, nanotextiles, physical properties, material parameters
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