Use of ready-mix adhesive for shower wall

[Scotiansailor]

Hello, I’m so confused after reading numerous threads. We have a new build, and I’m doing this first bathroom from scratch by myself (pretty much). Ive never tiled. The shower area is barely started, I just bedded down the nassboard shower floor to the concrete screed, and the surrounding walls are marine ply. I have 6mm hardie board to put on the marine ply. I bought Everbuild Aquaseal Waterproof tanking membrane, which I had planned to paint over the hardie board (one it’s fastened in place, seams tapes, etc). Now I’m reading I cant use the Bostix Showerproof ready-mix adhesive on the walls for my 10 x 20mm metro tiles. Is this true? Should I not tank the hardie board? Should I tank the marine ply before I put up the hardie board? I have a ton of other questions, but I better just start with that. Thanks!

 

[Dave]

Hello, I’m so confused after reading numerous threads. We have a new build, and I’m doing this first bathroom from scratch by myself (pretty much). Ive never tiled. The shower area is barely started, I just bedded down the nassboard shower floor to the concrete screed, and the surrounding walls are marine ply. I have 6mm hardie board to put on the marine ply. I bought Everbuild Aquaseal Waterproof tanking membrane, which I had planned to paint over the hardie board (one it’s fastened in place, seams tapes, etc). Now I’m reading I cant use the Bostix Showerproof ready-mix adhesive on the walls for my 10 x 20mm metro tiles. Is this true? Should I not tank the hardie board? Should I tank the marine ply before I put up the hardie board? I have a ton of other questions, but I better just start with that. Thanks!

Use a slow setting cement based adhesive 👍

 

[Scotiansailor]

Thanks Dave So, do you think using hardie board here is unnecessary redundancy?

 

[Dave]

Thanks Dave So, do you think using hardie board here is unnecessary redundancy?

Tiling to plywood on walls is outlawed , so yes it needs to be over boarded. Use the Hardibacker tape for the joints and skim over with adhesive to hold the tape and strengthen the joint. No need to tank if its not a wetroom floor.

 

[Tiberiu]

Better use Wedi boards instead Hardie. They are totally waterproof and you only need to use their special adhesive sealant between the joints. No waterproofing paint and no tape required.