This study aimed to evaluate the use of expanded clay in light concrete, mixed in order to be used for modeling of roof tiles with appropriate geometry, according to the comfort and technical demands of animal. Models of poultry house were built at the scale of 1:12, Jentsch (2002), and were oriented east-west. The roofs were made of three different materials: roofing tiles of expanded clay lightweight concrete (LWC), roofing tiles of fiber-cement (Fcim) and ceramic roofing tiles (Cer). The parameters evaluated inside of the reduced scale models were: Relative Humidity (RH), Dry Bulb Temperature (DBT), Black Globe Temperature (BGT), Black Globe Temperature- Humidity Index (BGTHI) and Thermal Radiation Load (TRL), during the summer. The results showed that the parameters RH, DBT, BGHI and TRL were statistically different among the systems. The best performance was shown by the model using tiles of expanded clay lightweight concrete (LWC).