I had purchased a new home several months ago. I noticed a sewer smell coming from my shower drain. Builder has snaked the clean out drain, took out bottom of shower and replaced, cut holes in several walls ajacent to shower. The smell does not come out anywhere else but the drain. When the floor was removed (down to the dirt) the smell was not noticeable, however, returned immediately upon being tiled. Help! What can I do next?
