A frame for a membrane, the frame comprising a rear outer section for structural integrity of the frame, wherein the rear outer section surrounds an inner frame opening; a front inner section secured to a front of the rear outer section to form a first chamber for housing a membrane, and a section for retrieving the membrane, wherein the front inner section has a curved or angular front surface in the form of an integrally formed or separately attached skin and wherein the first chamber and the section for retrieving the membrane are at the opposite ends of the frame; a first membrane guide located within the first chamber for use in deployment of a membrane; wherein a first aperture from which the membrane may be deployed from the first membrane guide and a second aperture through which the membrane may be received are located at opposing ends of the front inner section such that, when deployed, the membrane covers the inner frame opening and the majority of the front surface; and wherein access panels are provided in the front inner section for access into the first chamber.