System for mounting wall panels to a wall structure

A system for mounting wall panels to an existing wall structure, comprising:

• a plurality of wall panels, each wall panel having a main panel section and L-shaped hook walls at edges of the main panel section, each L-shaped hook wall including a first right angle panel section at each free side edge of the main panel section which extends at a right angle away from the main panel section, and a second right angle panel section which extends inwardly at a right angle from a free side edge of the first right angle panel section such that each second right angle panel section is positioned behind the main panel section in spaced, parallel relation thereto, with the main panel section and each L-shaped hook wall together defining a U-shaped cross-sectional profile;
• a plurality of unitary, single piece fastening extrusions, each fastening extrusion including:
• a planar section having a length,
• a first retaining wall structure near one end of the fastening extrusion and adjacent the securing section, the first retaining wall structure including a recess which opens in a first direction and receives one said hook wall of said wall panel, said first retaining wall structure being spaced from said one end of said fastening extrusion,
• a second retaining wall structure near another end of the fastening extrusion, the second retaining wall structure including a recess which opens in a second direction opposite to said first direction and receives one said hook wall of another said wall panel,
• said first retaining wall structure and said second retaining wall structure extend from a same side of said planar section,
• a first securing section for securing the fastening extrusion to the existing wall structure, said first securing section including a tail section of said planar section which extends between said one edge and said first retaining wall, and
• a second securing section for securing the fastening extrusion to the existing wall structure, said second securing section including part of said planar section positioned between said first and second retaining walls;
• and
• a closure member secured to the second securing section of each fastening extrusion and positioned between adjacent wall panels corresponding thereto.