Abstract: This invention provides a cover device mountable to the roof of an automobile for protection from snow and sun, having modular construction including body groups mounted on the front facing and rear facing surfaces of a frame. The frame is supported on a base positioned on the automobile roof by two extendable feet connecting the base to roof racks. The body group contains a number of cover pieces supported on the body supports. Bottom of the body support is fitted into a pair of rails attached to an adjacent body support such that the outer body supports are slidable along the rails and extendable to the extent allowed by the length of the rails. A locking device is installed to interlock the cover pieces within one body group. Body groups are secured to each other so that the body groups are extendable and retractable as a unit.

Abstract: This invention provides a cover device mountable to the roof of an automobile for protection from snow and sun, having modular construction including body groups mounted on the front facing and rear facing surfaces of a frame. The frame is supported on a base positioned on the automobile roof by two extendable feet connecting the base to roof racks. The body group contains a number of cover pieces supported on the body supports. Bottom of the body support is fitted into a pair of rails attached to an adjacent body support such that the outer body supports are slidable along the rails and extendable to the extent allowed by the length of the rails. A locking device is installed to interlock the cover pieces within one body group. Body groups are secured to each other so that the body groups are extendable and retractable as a unit.