Step 6 · Repair the Wall
With the plumbing confirmed to be leak-free, it's time to close the wall. Since we are using a remodel plate, the goal is to create a solid, flat surface for it to mount against. You can attach pieces of wood or metal strapping inside the wall around the hole to serve as a backing. Then, cut the piece of tile you removed to fit tightly around the new valve body. Secure it back in place using a strong construction adhesive or epoxy against the backing you installed. This doesn't need to be a perfect, waterproof tile job, as the large remodel plate will cover the entire area and its seams.