Owner inquired about the existing shower pan be replaced In addition to an owner-furnished shower valve replacement during tile work by others. Contacted Brad Garton via phone and I will send him pictures of the task at hand and Brad will contact the owner with a proposal for a 36â€x 36†fiberglass shower pan replacement and an owner-furnished shower valve replacement. Existing tile and backing board has been removed and new backing board has been installed by the tile contractor.