Abstract: Domed roof structures comprising a frame and covering to provide easily assembled and dismantled enclosures for uses such as swimming pool covers, garages, greenhouses, patio covers, sheds, tents and the like wherein a skeletal framework mounted on the outer periphery of the area to be enclosed, is covered by a flexible cover drawn taut thereover and buckled thereto. Embodiments to cover a wide variety of shapes of enclosures are provided.