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onyx shower wall installation

patrick rabbitt

Posted one year ago

salesman told me that I could put these walls up directly on the studs.. looking at videos, it appears I need to some sort of backer board or drywall in place.  Can you clarify this piece for me?

1. Can I install the walls directly to the studs or should I install backer board?
2. If I need backerboard, can I use drywall or does it need to be cement board?



Posted one year ago


Unfortunately your sales person is wrong. Onyx panels are always installed over a backer board. Ideally, a 1/2" board. 1/2" sheetrock is totally acceptable. If you were doing tile on the walls you would use a concrete backer. The reason for the backer is that is 'firs out' the shower panel out to be installed in front on the tile flange. The tile flange would sit behind the shower panel. The only purpose of the tile flange is in case of a leak the flange would prevent water damage. I hope this answers your question. 



Dave Shaklee

Posted 5 months ago

A quick question for you guys. Can onyx panels be installed directly over cinder block walls or do I need to sheet rock the block walls first?

Adam Harpe

Posted 4 months ago

Dave, Yes the shower panels can be installed directly to cinder block walls. However, when installing shower panels on a shower base or a bathtub you would have the issue of the tile flange. The shower panels must be installed in front of the tile flange ensuring a proper seal in your shower. That is one of the main purposes of the sheetrock behind the panels. Because the 1/2" sheetrock is thicker than the tile flange - when you install the shower panels they would rest in front of that flange. See the image below and replace the 5/8" stone with (3/8" shower panel) and replace existing framing with (cinder block wall). Shower pan cut away viewCheers! Adam  

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