Heat and sound insulating panel

An insulating structural wall supporting panel assembly comprising a pair of vertical panel elements of heat insulating material each having a main plate-like body portion formed with a plurality of spaced, hollow, elongated, sealed vertical chambers projecting from the plane of the main body portion and extending continuously for the full height of the assembly parallel to said body portion and to one another, said elongated sealed chambers being evacuated, and means interlockingly joining said panel elements, with said body portions in spaced parallel relationship, with said vertical evacuated chambers extending inwardly from said body portions, and with the evacuated chambers of the respective panel elements extending parallel and in surface abutment with each other, and wherein the elongated vertical evacuated chamber have inner face portions and wherein the inner face portions of the elongated vertical evacuated chambers of the respective panel elements are in surface abutting contact, and wherein said interlockingly joining means comprises vertical column-defining filler members of insulating material conformably interfitting with the spaces between the successive abutting inner face portions of the vertical elongated chambers.