Will the roof be covered with 50 cm of soil for heat insulation?

Adding 50 cm of soil to the roof can insulate the heat. According to the information query of roof greening covering soil, the thickness of roof greening covering soil has a certain influence on the heat preservation effect. When the roof is increased by about 30 cm, the indoor air temperature tends to be stable, which should be the reference critical value for the roof greening and covering soil thickness to achieve the ideal thermal insulation effect. So adding 50 cm of soil to the roof will insulate the heat. The thicker the roof, the better the insulation effect, but the heat dissipation problem will still exist when the thickness is 50CM, which cannot be completely solved.