A flexible covering product is provided comprising a foil layer having first and second major surfaces, a protective membrane adhered to the first major surface of the foil layer, and a pressure sensitive adhesive on at least a portion of the second major surface of the foil layer in a quantity sufficient to adhere a majority of the flexible covering product to a building structure. The adhesive is preferably covered prior to application to a building structure with a release liner. Methods of use of this flexible covering product are also described.