A comparison between different types of roof for the experimental
model was carried out. The energy simulation program
VISUAL DOE 4.0 was used on an experimental model with nine
types of roof. The results are shown in Table 3.
From the results, it was concluded that the roofing material has
a great impact on energy consumption. Table 3 illustrates that
concrete slabs with a soil depth of 0.20 m with savanna grass have
significantly reduced annual energy consumption of 406 kWh(62%) less than the exposed roof.