Install the Baseboard
Begin by installing the baseboard, which is the most critical piece for ensuring that all of the other pieces line up properly. Use a level to make certain that the baseboard is installed perfectly level and parallel to the floor (Image 1). The baseboard serves as a foundation for the wainscoting panels and other elements.
Once it is aligned and level, attach the baseboard to the wall using an air-powered nail gun (Image 2). You could also use a hammer and ordinary finish nails, but the power nailer will make the job go much more quickly. Use about two nails to hold each section of baseboard in place.
With the baseboard installed, begin installing the individual bead-board panels using construction adhesive applied to the back corners of the panels (Image 3).