1.* Reduce the thermal load on the glass:* the presence of the wall reduces the exposure of the glass to solar radiation, this reduces the effect of radiant heat that is usually easily transmitted through the glass.* Natural thermal insulation: * if the wall is made of insulating materials or materials of high density such as stone or concrete, it acts as a natural insulator that prevents heat transfer from the outside to the inside, which contributes to saving energy used in air conditioning.2.3.4.5.