Abstract: The present disclosure concerns a flexible thermal insulation assembly to thermally insulate matter from an external environment, the flexible thermal insulation assembly comprising a plurality of thermal insulation covering sections comprising an outer layer and an insulated matter-facing layer, the plurality of thermal insulation covering sections being configurable in an adjacent configuration wherein the plurality of thermal insulation covering sections are articulately connected to one another to substantially conform to an outer surface of the insulated matter; and an insulated matter-mounting assembly securing the plurality of thermal insulation covering sections onto the insulated matter with the insulated matter-facing layers of the plurality of thermal insulation covering sections at least partially covering the insulated matter and substantially conforming thereto. The present disclosure also concerns a method for thermally insulating matter, such as a snow heap, from an external environment.