Measure your bathroom to determine the amount of space to cover with wall paneling. Plan to buy extra paneling in case of errors when installing. Determine your budget for the project.
Select and purchase wall paneling for your project. Prices can vary widely, so use your measurements and budget to determine which paneling is in your price range. Look for paneling that handles steam and moisture well, and is labeled as made specifically for bathrooms.
Buy trim, or moulding, for your paneling project. Cover the panel seams with trim that's flat and narrow. Choose more elaborate trim for the base and top.
Decide if you're adding paneling over the existing walls, or replacing the existing walls. If you replace the existing walls, remove the sheetrock or drywall.
Measure the distance between the centers of the wall studs. Measure the height to cut the panels. Also leave a very small gap between panel sections.
Attach panels to the walls. Nail or screw panels to the studs, allowing two panels to share each stud. Nail or screw along the bottom and top of each panel.
Add trim to cover the seams, then add base and top trim. Paint as desired to match your bathroom.