In this study, the effects of ridge shapes on wind distribution on a low-rise building's roof were examined by wind tunnel tests. Two kinds of roof's shape were tested, one was a gable roof and another was a hip roof. For each roof, three kinds of ridge shapes were prepared; one was a ridge shape without ridge tiles generally used in wind tunnel test and another were the scale models of two different height of ridge tile. Large negative peak wind pressures for the gable roofs occur at the corners of the roofs and the end of the ridge. The local pressure distribution near the ridge differs with the shape of ridge and the pressure becomes smaller as the ridge height becomes taller. For the hip roofs, large negative peak pressures occur at the corners of the roofs. The peak pressure becomes smaller as the ridge height becomes taller in the same way of the case for gable roofs.
