Abstract: An enclosure for a window or door having insulative extendable and retractable sheet members which includes a housing having insulated widewalls, an insulated bottom wall and an insulated top wall for securement to a building structure for encompassing a window or door with the enclosure. The enclosure includes an outer thin flexible sheet closure member mounted on a first spring-urged takeup roller mounted adjacent the top of said housing with the upper end connected to the first roller. Also included is an insulative sheet member including a first sheet member and a second sheet member spaced therefrom with insulative material mounted between the same. The insulative sheet member is connected at the upper end thereof to a second spring-urged roller mounted adjacent the first spring-urged roller.