Wall paneling is easy to install, even for novice do-it-yourselfers. Before installing the paneling, let it set in the room for at least a day to adjust to the humidity level. Paneling will absorb moisture from the air, so it's important to allow room for expansion. Leave small gaps along the top, bottom and sides of each sheet. If the wall shows through between the cracks, use a marker to fill in the space so it's not noticeable.