It is not only lazy work. The tiles will come out piece by piece later on. The tile surface is always smoother than bear cement and adhersion to tile is a problem. Your new waterproof that is suppose to work under normal application cannot work properly in this tile on tile situation. Some use a special glue on the old tiles before waterproof, some deface the old tiles with acid just trying to get the old tile stick!!!! All these trying to tell you it is hard to work and get adhersion. So dont do the lazy work, ever.

This post has been edited by stevie8: Mar 31 2012, 05:32 PM