I want to continue a tile installation that was stopped sometime ago. I have 2x2 ceramic mosaic white wall tile that I want to install over painted cement backer board on one side and painted green board on the other. The paint was laytex primer. I need to scrape off some old globs left from the first install and then I'm ready to roll. I know I need to use a heavily modified laytex thinset.
Any other suggestions? Do I start at the top with the matted 2x2 and work down, or do I start at the bottom and work up? How do I keep the tile form sliding down the wall before it sets up? I'm trying to align with the original install.