In the renovation of existing buildings, it is extremely important to examine the existing structure prior to the planned renovation and be weighed, such as reliably the construction of implementation of rehabilitation measures will be wird.Der Fluessigwassertransport and any Durchstroemungen the construction and the dependence of the various material parameters of each other very often neglected which can lead to various damages functionality . The currently used stationary calculations form the reality often does not provide sufficient accuracy and therefore an insufficient evidence concerning the functionality and durability of a structure. Especially after an insulation is applied, changed the warmth and moisture behavior of a structure. These complex processes (Liquidtransport, diffusion, air velocity, etc.) can be shared mapping, still lack the appropriate models. In this project, an appropriate model should be developed. This collaboration with computer scientists is very good for it.