In many cases you can as long as there are no lumps and your new glue bonds well with it.
Sure can, but if its waxed tile you should rough it up unless there's a chance its got asbestos in it. Then use a primer sealer over that top to give the glue something to bind to. Also remember that the new tile is only as good as the old tile that's down. If the old stuff comes loose your new tile job is shot.
It is possible but I would not reccomend it. If possible remove the old tile before laying the new tile. If you want to avoid removing the old tile you can lay a cement board over the old tile before installing the new tile.
Yes, it does . Old tile glue will ball up and mess your job.
Yes, if the adhesive is smooth, no lumps and if you use a compatible glue, not thinset cement
I have never covered up floor tile before without removing the old tile but I have covered up an old back splash with new wall tile and did nothing to go over it just used the white pre mixed wall glue to install the tile right over top with no issues.
No, I would try to avoid that at all costs. If you do it, it will crack. It's best to remove the existing tile and smooth out subfloor before installing any tile, and most especially for installing marble which is very fragile.
Use petrol or paint tinner...
Depends on what kind of tile (porcelain, vinyl etc) and what kind of glue. You basically have told us nothing, so how are we supposed to answer sensiblyDepends on what kind of tile (porcelain, vinyl etc) and what kind of glue. You basically have told us nothing, so how are we supposed to answer sensibly
To install tile over existing tile, first clean and roughen the surface of the old tile. Apply a bonding agent, then spread thin-set mortar over the old tile. Place the new tile on top, pressing firmly to ensure adhesion. Grout the tiles once the mortar has dried.
You can if it's smooth and really sticking to the wall well enough. In this case, I would use a mastic style glue by Mapei.
Installing ceramic tile floors is hard work, labor intensive and extremely exacting. Most would say, in fact, that its an art form. Ceramic tile installers are craftsman with age-old skills. Expertise has been handed down from one generation to the next over dozens of centuries.
To remove old tile glue from concrete floors, you can use a heat gun and a scraper to soften and scrape off the adhesive. Another option is to use a chemical adhesive remover specifically designed for this purpose. Be sure to wear proper protective gear and ventilate the area when working with chemicals.