Broken or damaged tiles, worn grout joints, or even a break in the wall behind the tiles can all cause a best leaky shower floor. There are a few easy measures you may take to determine what needs to be fixed if you're not sure where your leak is coming from. We'll go over how to pinpoint the source of your leaks in this article so you can quickly and easily fix them It's time to patch the leak now that you know where it is! Turning off and draining your shower is the first step in repairing a floor leak. Then, remove any loose cement or grout that is still affixed to the subfloor beneath them using a hammer and chisel (or simply your hands). When all of this home renovation work is finished, you'll be able to see what's underneath: possibly more cement or grout, subfloors, or water damage, which could reveal the source of leaks.