Old bathrooms in vintage houses often suffer from hidden water damage, rotting wall studs, and crumbling old tile backer boards that have been slowly deteriorating for decades. When you do a full old bathroom renovation, replacing all the old damaged wall material with EPS Cement Sandwich Panel is the best way to make sure you will never have to deal with the same hidden water damage problems again. The panel is 100% water resistant, so even if water somehow gets behind your tile finish, it will never cause the wall material to rot, warp, or grow mold. You can install cement board tile backer directly over the EPS Cement Sandwich Panel, or even tile directly onto the properly prepared panel surface, creating an extremely solid, long lasting base for your new bathroom tile work. The panels can also be installed much faster than building a new traditional stud wall and installing cement board, which cuts the total bathroom renovation timeline down by almost half. Many experienced old home renovation plumbers now specify this panel for every bathroom remodel they work on, because it completely removes the risk of hidden water damage developing inside the bathroom walls decades after the renovation work is finished.