To start, you need to find and mark the center of your wall. Draw a vertical and horizontal reference line with your level. This will allow you to make sure that your panels are straight, even if your walls are not perfectly straight.
To determine the best positioning of the panels, carry out various tests. Determine, depending on the desired location of the pattern, whether you will place them horizontally or vertically.
Determine whether you will begin the installation by placing the first panel on the center line or resting on the center line. Avoid ending up with small parts on each side.
You will begin the installation from the top, making sure your ceiling is straight. To do this, you will use the horizontal level line by checking the distance between this line and the ceiling at several points in order to determine the lowest part in the event that the ceiling is uneven. Plan to cut some panels as needed so that they are all aligned at the bottom.
Leave a very small space of 0.3 cm (1/8 inch) at the ends of the wall and 1.25 cm (1/2 inch) at the bottom of the wall. This will allow the panels to expand during slight changes in humidity.
Before attaching the panels, place them dry first to make sure they fit properly. The panels must be fixed securely. Apply construction adhesive to the back of each panel. A 0.65 cm (¼ inch) bead of adhesive will suffice, as long as you apply it in an "S" shape.
Finish the fastening with a finishing nailer by nailing in the areas where the nails will disappear as much as possible.
There you have it, your project is off to a good start!