A collapsible wall for covering an opening in a structure when the collapsible wall is in an extended position. The collapsible wall including a plurality of frame sections engaged with each other to form a telescoping frame movable between the extended position and a retracted position, the frame sections forming at least a portion of a face of the collapsible wall and defining an aperture through the face. A panel is removably engaged to the frame sections, the panel covering the aperture when the panel is disposed in a closed position.