A system for mounting wall panels to an existing wall structure, includes
a plurality of wall panels, each wall panel having a main panel section
and hook walls at edges of the main panel section, with the main panel
section and each hook wall having a U-shaped cross-sectional profile.
There are also a plurality of fastening extrusions. Each fastening
extrusion includes a securing section for securing the fastening
extrusion to the existing wall structure, and a retaining wall structure
at one end of the securing section, the retaining wall structure
including a recess which receives one hook wall of the wall panel.