Nowadays energy is recognized as one of the main indicators of economic development.; It is evident that due to excessive consumption and the depletion of energy resources, we are facing a growing challenge concerning extraction and explotion costs. Accordingly, there are methods to decrease energy demand and improve energy consuming techniques.To serve a sample, maximizing solar energy absorbed through roof covering is one of the impressive ways to fall energy consumption off.Therefore, it is essential to pay more heed on energy efficient design in building elements.

Consequently, the paper intends to discuss on roof covering forms while comparing them in terms of solar radiation gain. The research method is based upon modeling and simulation. In general, in this research, there are 4 options for design and selection, the order of their energy absorption can be stated as follows: The amount of solar radiation absorbed in watts in different months is as follows: In all months of the year: pitched roof 45º > pitched roof 30º -60º > domed roof > flat roof. And the amount of solar radiation absorbed in watts per square meter in different months is as follows: 1. In January, February and December: flat roof > pitched roof 30º -60º > domed roof > pitched roof 45º. 2. In November and April: flat roof > domed roof > pitched roof 45º > pitched roof 30º -60º. 3. In March, October, September, June, August and July: flat roof > domed roof > pitched roof 30º -60º > pitched roof 45º