Start at the top of the wall and working towards the floor to reduce any visible installation variances that may occur if a wall is not perfectly square. This also allows for any inconsistencies to be more easily concealed with a complimentary baseboard trim, keeping them away from eye level.
In a zig-zag pattern, apply permanent construction adhesive to the back of each board. If your project is only temporary, you can skip the adhesive. Set the first board in place along the layout from step 2 and reinforce it with a nail or screw it into the wall stud. You can either face nail the board with finishing nails or a brad nailer or you can top nail at a 45-degree angle to avoid face nailing. Always check that each row is level and square.
Measure out each row and cut each piece using an electric or traditional miter saw. You can use touch up paint to touch up each end-cut. Be sure to check your measurements twice to insure the cut is correct. Do this until your wall is complete.
When you have to cut out for the light -switch or electrical outlet be sure to leave a half-inch space around the outlet to allow the cover to be installed flush to the drywall or talk to an electrician to learn how to shut off the power to those outlets.
Remove the cover and the nail or screw holding the electrical box in place against the stud. Extend the position of the electrical box out the thickness of the accent board 7/8” - re-fasten the box to the wall stud. Alternatively you can purchase electrical box extenders or spacers and longer switch plate screws. Proceed to cut out boards to leave a quarter-inch of space around the outlet – enough for the cover to conceal the gap.