deeraeya
New Member
I'm installing a Gerberit in-wall toilet (111.728.00.1). For those who have done so before me: what wall covering material did you use? Does one have to tile behind the wall-hung toilet?
We're not far off now, but just hit a stumbling block and wondered what others have used as the wall-covering material behind the toilet. I was planning to use drywall, but re-reading the instructions the booklet lists "Gypsum / greenboard", cement backer board etc, but calls for a minimum thickness of the wall covering of 3/4 inch (p. 2).
Since it's almost impossible to get 3/4 inch drywall and (AFAIK) impossible to get 3/4 concrete backer board I'm pretty confused by this. I guess one could interpret this as including tile, but I wasn't planning to tile that part of the bathroom (and saying "Gypsum / Green board" as an acceptable material doesn't imply tiled to me, especially since they list "Ceramic tile surface" in the same list).
Confused I called Gerberit Tech support where they managed to confuse me even more. The advisor said that they didn't recommend drywall since the force pushing back on the toilet was too high ... so he suggested concrete backer board. I pointed out that they don't make that in 3/4 inch ... and he basically shrugged. eventually he suggested using backboard just behind the toilet .... which makes no sense as you have to fix it to the studs on either side. I was pretty disappointed with that call.
Anyway, sorry for the long rant. For those who've installed wall-hung toilets, have you seen any issues with simply using drywall? Signs of crushing, etc? Do you use 1/2 inch drywall or 5/8 or even try to source 3/4 drywall?
FWIW, the TOTO in-wall frame instructions call for 1/2 drywall (and since it's exactly the same shape as the Gerberit one, it would be very strange if there was something special about the Gerberit frame that required 3/4 or backboard etc).
We're not far off now, but just hit a stumbling block and wondered what others have used as the wall-covering material behind the toilet. I was planning to use drywall, but re-reading the instructions the booklet lists "Gypsum / greenboard", cement backer board etc, but calls for a minimum thickness of the wall covering of 3/4 inch (p. 2).
Since it's almost impossible to get 3/4 inch drywall and (AFAIK) impossible to get 3/4 concrete backer board I'm pretty confused by this. I guess one could interpret this as including tile, but I wasn't planning to tile that part of the bathroom (and saying "Gypsum / Green board" as an acceptable material doesn't imply tiled to me, especially since they list "Ceramic tile surface" in the same list).
Confused I called Gerberit Tech support where they managed to confuse me even more. The advisor said that they didn't recommend drywall since the force pushing back on the toilet was too high ... so he suggested concrete backer board. I pointed out that they don't make that in 3/4 inch ... and he basically shrugged. eventually he suggested using backboard just behind the toilet .... which makes no sense as you have to fix it to the studs on either side. I was pretty disappointed with that call.
Anyway, sorry for the long rant. For those who've installed wall-hung toilets, have you seen any issues with simply using drywall? Signs of crushing, etc? Do you use 1/2 inch drywall or 5/8 or even try to source 3/4 drywall?
FWIW, the TOTO in-wall frame instructions call for 1/2 drywall (and since it's exactly the same shape as the Gerberit one, it would be very strange if there was something special about the Gerberit frame that required 3/4 or backboard etc).
