dominus_aranearum t1_iu3haue wrote on October 28, 2022 at 7:51 AM

The only things you need to worry about are that you're using the proper backer, mortar and waterproofing and that your ceiling can handle the additional weight.

My biggest concern, other than the weight of the tile/mortar/backer on the ceiling would be an improperly attached tile falling and injuring someone or damaging something. Proper prep work and materials are very important.

Emerald_Yautja OP t1_iu3t6sd wrote on October 28, 2022 at 10:38 AM

>I have already done the ceiling. The tiles have been up there for about a month. I used Schluter All Set in the shower area, and I used a polymer modified thinset for the rest of the ceiling. I did my best to mix it well and I buttered and trowelled both the ceiling and the tiles. I used cement board for the majority of the ceiling and Kerdi on the ceiling of the shower (I had Kerdi left over from the walls). I didn't do anything specific for a ceiling.
>
>Should I be worried they may come down while using the shower? Any way to test it?

dominus_aranearum t1_iu6acb3 wrote on October 28, 2022 at 9:37 PM

Realistically, if you followed instructions and used appropriate backing and screw pattern for the ceiling cement board, you're probably fine. But if you affixed the cement board to your 24" on center trusses or 16" on center floor joists, the cement board doesn't have enough support. Probably needs 12" on center and blocking at any seams.

Also, did you install the cement board over drywall? Or directly to wood framing?