Add 1 cup of muriatic acid to the container and stir it.
Removing mortar from roof tiles.
When the job of removing dried mortar seems more involved there are a few tools you should consider using.
Spray the area with the vinegar and wipe down with the sponge.
Don your protective gear and fill your container with at least 5 gallons of water.
Pay special attention to areas that may have excess mortar such as grout lines on a tile floor and grout joints on a tiled backer board.
The thin set instructions say to sponge off any mortar from the tops of the tiles immediately or at least as soon as possible.
Remove a piece of tile from the solution.
Use a scraper or razor blad.
Scrub the mortar with a scrub brush to remove the residue the.
How to remove mortar from old tiles for reuse.
A wire brush can be used to scrub away dried mortar from the area but that can take quite some time if you do it by hand.
In this video i use muriatic acid diluted with water to remove dried mortar from ceramic tile.
I was doing that at the beginning but i was getting really annoyed because after placing each tile and positioning it perfectly and adding the spacers the tile would move out of place every time i sponged it off.
Make sure to apply pressure to the areas with the thickest layer of thin set.