shower stall info

May a person use green board for walls of the stall, if there's 1/4" of cement board screw to it and 2+4's? Should there be thinset between green board and cement board? There's also 3" of 1/2" treated plywood in the fabricated pan ensuring no contact between the mortar pan and green board. I know it's not correct, but will it be acceptable?

If you know it is not correct why are you doing it?

Is this your work you are trying to pass off as ok or did some one do this work for you and now they're trying to get you to pay them for doing crap work, selling you on their novel approach that's worked for them for 20 years with no problems?

It's wrong on so many levels.

[www.ontariotile.com] shows how to build a shower using traditional mud preslope/liner/setting bed mud layer as well as Kerdi shower construction. Pick and do one of them.

I'm finishing some elses job. Do you see any problems with 1/4" cement board? It looks good.

Thank you

It really needs to be redone.

The liner needs a slope under it. Given the description you gave of the current level of hackmanship, I'll bet the liner is flat on the floor with just a setting bed over top.

Why do I envision cement board nailed to the cub framing? By code, there can be no fasteners through the liner at any point that is lower than 1" below the finished curb height. Kind makes ou also wonder how many holes it takes to fasten plywood in the lower 3" of the pan too. Why do I envision PT 2x4's used for the curb as well?

If pt plywood was used in the bottom 3", it will twist and warp in time destroying the bottom row of tile. No PT plywood in any shower construction or any tile installation.

No greenboard. Cement board won't waterproof anything and won't protect the greenboard. If you tile it, you are saying everything up to now is correct and you own everything done up to now.

It looks good.

Do you wear glasses? Did you leave them home today?

Thanks not the info I wanted. What's the difference between cement board and wonder board, besides thickness? I thought they were the same. I would think the thinset, tile, grought, liner, cement board, and slope before the liner was installed, would prevent moisture damage. The plywood is outside the liner also. Thanks for your knowledge. Tear down that wall! lol

. What's the difference between cement board and wonder board

Wonderboard is a brand name for a cement board product.

I would think the thinset, tile, grought, liner, cement board, and slope before the liner was installed, would prevent moisture damage

And you would be wrong.

Lundberg you won't get anyone here to agree with what you have, er uh um, what the other guy has done. It just won't fly my friend.