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Unread 04-22-2007, 10:37 AM   #1
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Smile Noble Shower Curb and Misc liner Questions

All my rough in, electrical and framing work is done!! Just a couple of Questions I'd like to ask before start the mud job and tile work:

1) I've seen allot of questions asked about the noble pre-formed curb -- does anyone have actual experience with it, positive or negative?? For a DIY guy it seems like a slam dunk...

2) CPE vs PVC membrane -- any real advantage of one over the other?

3) I'm a little concerned about the hospital corners and getting this to lay flat when I lay the CBU on top of it. I did not "notch" the wall studs for the membrance, and my backing boards are flush with the studs (the devil is in the details I guess). I'm thinking the backerboard, screwed in about an inch above the curb line , should cinch it tight enough (no?) -- please let me know if I am getting into trouble here or what my options are.

Any advice would be appreciated.

Haven't ruled out going with the kerdi, I just find the "modified"/"non-modified" debate regarding porcelain tile a little unnerving. So in that sense "old way, best way" might do it for me...


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Unread 04-22-2007, 11:47 AM   #2
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Hi Dan:

I've not used the Noble curb but it looks like a good design and I see nothing about it that would cause me any concern.

CPE vs. PVC; I'm not aware of any particular advantages of one over the other.

Dan, you are heading down of path of grief if you don't back up and notch those studs. No matter how you fold that liner you will have three layers of membrane on at least one side of the corner. Screws are not going to suck the CBU into plumb position against the stud. If you don't fix it now, when tiled that budge will become quite noticeable. Have you seen the Shower Construction thread in the Liberry where the need for notching studs is discussed?

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Unread 04-22-2007, 11:47 AM   #3
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Hi Dan,

I have used both PVC and CPE membranes and have noticed no considerable difference. However, according to the Ceramic Tile Education Foundation:
"CPE is chlorinated and remains flexible. PVC contains plastizers and may become brittle. " You can find more info here:http://www.tileschool.org
As I stated, though, I have had no problems with either.

About notching the studs: what Mike said.
Roger (The FloorElf)

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Unread 04-22-2007, 01:57 PM   #4
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Hi Dan,

About the studs, I'll make it three. Notch 'em.
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Unread 04-22-2007, 04:05 PM   #5
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Thanks so much to everyone --- I haven't purchased the membrance yet so I guess I'll try the CPE...

Somehow I knew I had to notch the studs, notched they will be... hmmm makes kerdi look a little better!!!
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Unread 04-22-2007, 05:55 PM   #6
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If one was to fir out with strips of 1/4" plywood, would that be enough room for the folds in the liner corners? Would 3/8" be too much and if so, what are the consequences of the bigger gap?

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Unread 04-22-2007, 07:06 PM   #7
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hi dan for what it is worth when i did my shower and i have to say it came out great i didn't notch the studs i took the route of furing out 1/4 in" on the studs above the noble cpe liner material. if you already put in your 2 by material between the studs at the bottom and it is flush with the studs the furring would be easier. i did a mud preslope and not the premade one from noble but it did look tempting and as far as i know the cpe is good for 50 + years and the pvc is good for 30 to 35 years. i read that some where.
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Unread 04-22-2007, 07:31 PM   #8
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CPE will also take a much tighter fold or crease ..
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