A wrappable protective sleeve for preventing fluid from freezing in a conduit; method of protecting and heating a conduit, and method of constructing a sleeve for protecting and heating a conduit are provided. The sleeve includes an elongate wall having opposite edges extending lengthwise between opposite ends. The opposite edges are configured to overlap one another to form a dual layer overlap region including an outer portion and an inner portion underlying the outer portion to provide an enclosed tubular cavity. The at least one elongate heating element extends between the opposite ends within the inner portion of said wall.