I was told that there was no problem installing tiles on drywall hung on steel studs. I had never worked with drywall before and accepted that. Now after the wall is done, if I hit it, I noticed that it vibrates significantly.
Does that affect tiles installed on it? Like cracks in grout, etc?
PS: I'm in Brazil, drywall is kinda new here, and it is only done with steel studs, no wood.
Movement is the enemy of masonry of any type. In this case, it depends on a few factors. How much movement? How often does the movement occur? What products were used to install the tile? What size and type of tile?
If all you're asking is whether some cracking is likely to occur, the answer is yes. However, it may be negligible from an aesthetic standpoint. The severity depends on the things I mentioned.
If you're asking how you might prevent damage, that depends on whether the wall interior is still accessible. If so, consider adding stiffening members to reduce deflection. More studs, engineered wood, heavy steel, or other devices could stiffen the wall and reduce movement.
