A modular enclosure, such as a shed, may include sidewalls and a roof. The roof, for example, may include one or more roof panels. The roof may also include a truss that is sized and configured to support the roof panels. The shed may also include one or more support beams that may be connected to the truss and may be connected to one or more panels. The shed may include one or more brackets used to connect a pair of panels that are positioned at an angle to form a corner of the shed. The shed may also include a cover, which may include one or more receiving portions sized and configured to receive at least a portion of the brackets. A plurality of roof panels may be positioned within a shipping container to form storage areas or cavities sized and configured to receive all or at least a portion of one or more floor panels.