The invention relates to a process for sticking edging material (12, 10) onto lightweight building boards (1) comprising two thin-walled outer layers (2, 4) and a core layer (6) of lightweight filler material disposed between the outer layers, having the steps: provision of a lightweight building board (1), a decor edge (10) and a stabilizing edge (12), and sticking on of the decor edge (10) and/or the stabilizing edge (12) in the region of a narrow surface (1′) of the lightweight building board (1). The process according to the invention is characterized in that the stabilizing edge (12) is introduced into a section between two outer layers (2, 4) in the region of the narrow surface (1′) without having first created a recess of at least one outer layer and/or of the core layer in this section, said recess corresponding substantially to the stabilizing edge.