The aim of this work is to study the one-dimensional heat and mass transfer through a ceiling wall containing micro-encapsulated PCC (phase change concrete) under realistic climatic conditions based on meteorological data in Tunisia based on software EnergyPlus. This work deals with a numerical study based on the nodal method to predict the effect of integration of a layer of PCC on the thermal, mass behavior and on the thermal sensation of the occupant as well as on the reduction of the energy consumption for the summer and winter period associated with the composite envelope building.