Abstract: A self-adhering duct insulation board having a central foam insulation board with first, second, third, and fourth parallel outer board bend channels formed into an outer surface thereof and first, second, third, and fourth parallel inner board bend channels formed into an inner surface thereof, the first, second, third, and fourth outer board bend channels being oriented in parallel with the first, second, third, and fourth inner board bend channels, each of the first, second, third, and fourth outer board bend channels being arranged in relation to one of the first, second, third, and fourth inner board bend channels in a manner to form a flexible board bending hinge; an outer foil layer permanently attached onto the outer surface of the central foam insulation board, the outer foil layer forming four foil bend channels, one into each of the first, second, third, and fourth outer board bend channels of the central foam insulation board; an inner foil layer permanently secured to the inner surface of the cen