Evaluation of Overall Thermal Transfer Value (OTTV) for commercial buildings constructed with green roof

► Correction factors ranging from 0.03 to 0.99 were derived for OTTV evaluation of building with green roof. ► An experimental setup of green roof was constructed on the rooftop of a building. ► Field measurement was conducted in the green roof system. ► Computer simulation model (EnergyPlus with Ecoroof) was validated using experimental data of the green roof.