Use your tape measure to find the square footage of the wall you will be covering so you know how many panels you will need to fully cover it.
Prep your wall by washing it down with soapy water and scrubbing any dirt off the surface. Rinse and let completely dry before beginning to apply your faux brick panels.
Apply a line of construction adhesive along the edges of the back of the first panel you will use. Make sure this line of glue is placed between 1/2 inch and 1 inch from the edge so it does not ooze out once pressed against the wall.
Begin applying your panels starting in the center of the very bottom of the wall and work your way out and up to completely cover the wall with your faux panels. Firmly press the side of you panel with the construction adhesive against the wall with the tongue side of the panel up and the groove side facing down.
Squeeze a small amount of caulk along the edges of your now attached panel where the next panel will fit into it, and slide the next panel with construction adhesive along the edges into place on the wall interlocking the edges of the two panels.
Repeat this process with all remaining panels, fitting the pieces together until the entire wall is covered. Make sure as you are fitting the pieces together, you are removing any excess caulk with your wet rag.
Use your saw to cut any smaller pieces needed to fill small spaces along the edges, and use extra caulk to fill any cracks or spaces between the panels. Use your rag to match the texture of the caulk to that of the mortar pattern on your panels.