Bathrooms are a little bit different than every other part of the house, particularly in the shower area. All the moisture in bathrooms means that some special extra steps need to be taken to keep the room dry, which prevents the growth of mold and bacteria that can be harmful to you. \
Because showers are such excessively wet places, backer boards are used to create a waterproofing barrier between the wall and the shower. Backer boards, also called shower boards, are typically made with cement or fiberglass. \