[ymc_cof]

Remove the old cast iron trap and convert to PVC using No-Hub Bands,(see image) and bring the trap and raiser up directly under the shower drain. Good luck, Tom

Thanks for the suggestion, I will try it.

I have another question about the sheetrock with the showerbase I am trying to install.

I found there is a gap (space) about 1/2" between wall stud and showerbase on both (left and right) sides after I lay down the shower base (or 1" on one sides). So, I plan to use 3/4" green board on both side.

But, my original sheet rock is 1/2". What's the better way to handle the space between wall stud and shower base? Push to one end or keep same space on both sides?

In either way, how should I handles the sheetrock issue?

Thanks,

YMC

[dclynch]

What kind of shower wall are you going to install? If it is a fiberglass surround, you should check to see how it is supposed to fit. The gap might be appropriate.

If tiling, I would shim out the studs so that the backer board will clear the lip of the base. You have to use a cement board now, greenboard is no longer up to code. Hardibacker is widely available and not that much harder to work with than greenboard. A vapor barrier (poly sheet) goes behind the backer board and overlaps the pan edge.

[ymc_cof]

What kind of shower wall are you going to install? If it is a fiberglass surround, you should check to see how it is supposed to fit. The gap might be appropriate.

If tiling, I would shim out the studs so that the backer board will clear the lip of the base. You have to use a cement board now, greenboard is no longer up to code. Hardibacker is widely available and not that much harder to work with than greenboard. A vapor barrier (poly sheet) goes behind the backer board and overlaps the pan edge.

Fiberglass surround will be used. Based on the instruction, the sheetrock needs to sit on top of the edge (lip?) of the showerbase then the fiberglass surround will be attached.

Such as following:

WSSSFF
WSSSFF
W B FF
W BBBBBBBBBB

Since there is 1/2" space between wall stud (W) and edge (B) of the showerbase on both left and right hand side. if I use 1/2" greenboard, the green board will slip into the gap and won't sit on top of edge.

In order to have greenboard sit on the edge of showerbase, I need to use a thicker one. But, then, the wall has original sheetrock which is only 1/2", this means the joint between newly installed greenboard and the original sheetrock is not even. Will this a problem? Can I just use mud to cover the difference of height?

I think if I move the showerbase to right hand side (the shower head side), then the left hand side will have 1" space between wall stud and showerbase.

Then, I can use 1/2" greenboard then 5/8" greenboard attached together before I apply fiberglass surround; such as following

W22****F
W22****F
W22BB F
W22BB F
W22BBBBBBB

Will this a better way and satisfy the code?

Thanks,

YMC

[dclynch]

Sorry, but I don't know anything about fiberglass surrounds.