Mud Set Pan with Drywall Backer Board

bathtub mold

This is a tract builder’s mud set shower pan. Not sure why they did this as a fiberglass shower pan is less expensive. This must have been an “upgrade” for the home buyer. It seems this has been leaking through the ceiling for a few years, rotted the floor and looks like the builder used regular sheet rock as a backer for the tile. Small ants have been spotted. All living things need moisture including mold, fungi and ants.