ABSTRACT
In order to estimate the process of decomposition of building material, it is of great importance to be familiar with the inner and outer stresses of the material. The outside climatic stresses play a very significant role in the decomposition process of material used on a building’s outermost surfaces such as the facade. The factors which decide whether material decomposition proceeds slowly, or is accelerated, are present in what
takes place in the microclimate surrounding various buildings. By microclimate is meant in general those meteoro-logical variations on the material surface. The most important factors determining microclimate are surface temperature, ultraviolet radiation, surface moisture and extent of pollution on the material surface.
