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Old 08-05-2019, 09:02 AM   #1
rudyrock
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Modifying Kerdi niche

Hi All
New to the forum, although have been lurking and learning for some time..great site.
Im a DIY guy that has hit a small snag in my shower stall install.
Bought a schluter niche 12x20" thinking it would fit the stud bays... nope... too many pipes and studs in the way.
So i'm thinking of moving a stud over a bit (non bearing wall) cutting down the niche to 10 1/2" wide so it will fit. Looked around the site for a while and couldn't find an exact answer. I am thinking of cutting the piece out and gluing together with some kerdi fix and then using K band over the cut on front and back.

Will that work? I know schluter won't warranty; no biggie for me and the placement will be on the wall that holds the shower valve so no direct water spray. Thx in advance for advice.

Rudy
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Old 08-05-2019, 09:07 AM   #2
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Welcome, Rudy.

I see no reason why that wouldn't work, but I'd still recommend returning the Schluter niche if it doesn't fit your application and simply making your own niche within the confines of your structure as needed.

My opinion; worth price charged.
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Old 08-06-2019, 08:01 AM   #3
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Smile Modifying Kerdi niche

Thx JB I'll build one
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Old 08-10-2019, 11:04 AM   #4
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It works. I like to fill it up with water when done to check it but it works.
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Old 08-12-2019, 01:30 PM   #5
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Did you have any luck adjusting your shelf that comes with the 12x20? Mine is loose fit with the product in the box but I cannot figure out how to mount it inside the niche and keep it from sliding down....
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Old 08-12-2019, 05:37 PM   #6
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Hey Rudy !

We have done a lot of Kerdi board science projects in the past few years -
And Customized many Schluter Niches as well .
Iíve worked with several Schluter Reps and they didnít blink at all so long as
We have correctly overlapped Kerdi/band in the process .
Let me see if I can dig up some pics
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Old 08-12-2019, 06:18 PM   #7
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Wow so just banding it in place is enough to hold a big bottle of shampoo for example on the upper shelf?
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Old 08-13-2019, 06:30 AM   #8
RichVT
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The shelf in a niche is normally supported by the tiles on the sides and back of the niche that are below the shelf.
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Old 08-13-2019, 07:23 AM   #9
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wow Rich - it seems like such little material to support the weight - but I suppose the band and thinset does add some structure...adding tile to the bottom and side of that will help as well.
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Old 08-13-2019, 07:42 AM   #10
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Joe

The cross shelf gets thinset or Kerdi Fix as an adhesive , then it is permanently locked into place with the tile abutting it on all sides . We install slab corner shelves and small benches on The same principle of compression ( locked in by the tile ) and it’s very
Strong !
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Old 08-13-2019, 08:17 AM   #11
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Joe, the absolute minimum shear bond requirement, which would be the bond between the thinset mortar and the Kerdi or Kerdi niche material is 50psi according to ceramic tile industry standards.

So, if you had only 20 square inches of bonded tile on each side of the niche supporting the ends of your niche shelf, that would amount to at least 2,000 pounds of available support. and that doesn't even consider the tiles across the back of the niche. Doubt you'll likely have more weight than that in shampoo bottles.

My opinion; worth price charged.
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Old 08-13-2019, 08:19 AM   #12
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I just installed my shelf with thinset. seemed quite sturdy. and now its all tiled in.
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Old 08-13-2019, 09:13 AM   #13
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Just to clarify, when I've modified mine I've used sealant to bond the two together. I've never tried it with a Kerdi niche specifically but have done it with both Noble and Laticrete foam niches.
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Old 08-13-2019, 11:27 AM   #14
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I'd probably just get a sheet of 1/2" Kerdi board and make a custom niche. You could probably make several out of one sheet.
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Old 09-09-2019, 02:39 PM   #15
rudyrock
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Modifying Kerdi niche

Thx guys

I have decided on building a custom niche after reading more posts. Got enough board to use.
I will have a few questions on measurements to match the grout joints later.


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