The present disclosure provides a roof assembly for covering a region adjacent a structure. The roof assembly comprises a plurality of roof assembly portions, each roof assembly portion comprising a layer portion and a support portion for supporting the layer portion. The roof assembly portions comprise first and second side roof assembly portions, and a corner roof assembly portion that is positioned between the first and second side roof assembly portions. The roof assembly portions are moveable between a retracted and an expanded configuration wherein the side roof assembly portions and the corner roof assembly portion move together between the configurations.