It's hard to say if this is a good thing, but right now in one of our bathrooms, there is a pile of tile that has been broken into pieces, and two workers staring down into a foot deep hole that is filled with water. It might be good if it means they've actually found the source of the leak. It might be bad if it means they simply made a giant mess in my bathroom, uncovered some water, and will simply leave when they're done. Time will tell.
10 years ago