Abstract: A wasted spacer member for wall elements consists of cross-shaped and T-shaped members each composed of two elements whose face planes are parallel to each other, and the intersecting point of their arms lies on a common axis perpendicular to the face planes. The two elements of the spacer member are connected to each other by at least one web member of such a length that the distance between the two outer surfaces of the spacer member is less than the thickness of the wall elements and the width or thickness of the arms measured in the planes of the elements corresponds either to the joint width between the individual wall elements or to the joint width plus the sum of the groove depths of two adjacent wall elements.