How To Tile Over Existing Floor Tiles. It is recommended to sand the floor using 80-grit sandpaper. To do this scoop a small amount of thin-set adhesive onto the floor then drag the edge of the trowel over it to cover the floor.
I also recommend in areas where you dont feel that they will stick well enough- invest in a can of 3M adhesive. Optional- oscillating tool with grout removal blade and Quickcrete if you have some obviously uneven existing tile Step 1. Prime existing tiles with an Acrylic primer or SBR add a handful of sand to the mix which will provide a key.
To properly lay laminate floorboards over your tiled flooring follow the procedure outlined below.
Apply a layer of thin-set tile adhesive to the vinyl using a notched trowel. I recommend following the instructions which included applying a primer on the original floor first and renting a 100-lb roller to go over the tiles once you have laid them down. Apply a second layer this time using the notched edge of your trowel. Apply a layer of thin-set tile adhesive to the vinyl using a notched trowel.
