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Unread 10-30-2010, 06:48 AM   #1
G Archer
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Shower installation advice

Hi folks,great forum ,im new to the site and I would like to ask a few questions about shower construction.I have laid several small tile floors but never constructed a shower.I was reading about the different water proofing methods available today.Are the new methods such as the Kerdi system better than the older double mud pan construction?Is the poly behind the CBU on the walls as good at waterproofing?Please give some thoughts on the old vs. new method.

Thanks, Glenn
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Unread 10-30-2010, 07:14 AM   #2
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Glenn, either method will produce a leak-tight, long lasting shower, if done correctly. The advantage of a Kerdi shower is that water remains near the surface of the tile, rather than soaking through the backerboard, so the shower dries out faster. Drier showers are less likely to grow mold.
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Unread 10-31-2010, 08:45 AM   #3
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Shower installation advise

Hi folks,just a couple quick questions,I'm installing a 3'x3' neo angle shower,my drain will be about 2'' offset to one side because of a floor joist.I figured about .375 preslope.Can I still use this slope around the perimeter as if the drain was in the center?Is the kerdi system really worth the money for a DIYer? Great site!!!

Thanks,Glenn
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Unread 10-31-2010, 08:56 AM   #4
Brian in San Diego
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Glenn,

The slope is calculated by measuring the furthest point in the shower from the center of the drain. You then need to have a minimum of 1/4" slope per foot of horizontal run. If the center of the drain is 3' from the furthest wall then the slope has to be a minimum of 3/4". In your scenario the furthest wall would have to be 18" from the center of the drain.

Once the slope is determined then the height of the finished drain has to be determined. Once that's determined then one would add the amount of slope and make a mark on the wall. Then a level line is drawn all the way around the shower and this becomes the reference for the height of the mud bed along the walls.

Kerdi is definitely worth it IMHO.

Brian
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Unread 10-31-2010, 09:04 AM   #5
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Quote:
posted by Glenn:
Is the kerdi system really worth the money for a DIYer? Great site!!!
What Brian juss said Perimeter of the shower pan needs to be same height so your first row of tile is all level.

Glenn yes the system is great for a DIYer, in fact the kerdi system has allowed many DIYers the ability to do they're own waterproof shower, and yes many with guidance from this site. I am thinking DIYers were the target for this product by Schluter but many pros using it as well. Allows you to do a mud pan without the traditional liner and preslope. You do your mud pan with the slope in and then you kerdi over it. So you're waterproofing from the surface before you tile not underneath like the traditional methods. You Kerdi the walls as well and you can use sheetrock. So your waterproofing the shower on the surface as opposed to underneath, easier to maintain and less time for mold to grow.

In fact we some DIYers here who did the kerdi system and got so interested in it they are guiding others with they're experience. Experience is the best teacher
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Unread 10-31-2010, 10:01 AM   #6
G Archer
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Thanks for the great advice.Would I need to kerdi the outside of the shower since it will be tile also or will CBU work? My shower valve is on a closed wall now,I would like to put it in the shower wall,where I could access it from inside the bathroom,but there will be tile on that wall on the outside.Is there any tricks that can be done to hide it?Thanks for the insight.


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Unread 10-31-2010, 10:18 AM   #7
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Welcome, Glen.

You need install the waterproofing membrane only in the wet area of your shower. You can tile outside that area over sheetrock or CBU without any sort of waterproofing.
Quote:
Originally Posted by Glen
I would like to put it in the shower wall,where I could access it from inside the bathroom,but there will be tile on that wall on the outside.Is there any tricks that can be done to hide it?
Not sure I unnerstan the question. You're wanting to make an access panel in your wall behind the shower valve?

My opinion; worth price charged.
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Unread 10-31-2010, 12:21 PM   #8
G Archer
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Sorry I was unclear,explaining things is not my strong point,yes i'm wanting to have access to the valve.The old valve was on a wall in the main hall and it was drywalled over with no access and it leaked causing trouble.I was wanting to have access where I could check on it from time to time.The wall I was thinking about installing it on is one of the ones that make up the outside of the shower stall.I'm not sure it can be done without sticking out like a sore thumb.

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Unread 10-31-2010, 01:21 PM   #9
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Glenn,

There are some nice plastic access panel covers which can be found at HD or Lowes, which , when painted, almost disappear. kinda sorta.
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Unread 10-31-2010, 01:31 PM   #10
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You can make an elaborate, removable panel, attached by magnets or similar, and tile over it, caulking the joint around the panel so you can cut it out later.

Or you could leave a large hole, make a wood panel to match some existing cabinetry in the area and attach that over the hole using one of a number of cabinet door spring latches.

Or you could leave a large hole and hang a picher of your granny over it for easy access.

My opinion; worth price charged.
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Unread 11-07-2010, 07:00 AM   #11
G Archer
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CBU installation

Hi folks, I am building a 36 '' neo angle shower and using the kerdi system.Where the CBU's meet the angled wall is about a 1/4 gap and you can see the stud.Can I fill this gap with thinset when I install the kerdi membrane?Also will unmodified thinset work on the CBU's?

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Unread 11-07-2010, 07:03 AM   #12
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Hi Glen,

you can fill it with thinset, that won't be a problem. Unmodified is the only thinset that schluter specifies to install Kerdi. Have fun.
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Unread 11-07-2010, 07:43 AM   #13
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Hi Glenn,
Please keep all of your shower project questions riught her on this one thread. Bookmark it for yourself so you can find it whenever you need it.

Kerdi - good stuff, I used it on my shower and have since gone through Schluter's training program as well. (for fun mostly but it helps me answer questions here on the forum too)

MY advice - skip the cement board and build your shower with regular drywall. Cover it with Kerdi and you will be all set.
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Unread 11-07-2010, 09:19 AM   #14
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Glenn,

You can fill that gap if you desire, but there is no real need to. Unless your tiles are 1/4" in surface size. Which I doubt. Normally the tiles can span over that gap, or the gap is mute because you don't tile all the way against the adjoining wall anyway.
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Unread 11-14-2010, 07:35 AM   #15
G Archer
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H folks,Im doing a kerdi shower and I already had the Hardi backer so I used it.I saw in an earlier post there where added complications using it with the kerdi.What are they?When installing the kerdi drain can you set the drain in thinset and let it harden and then come back and lay the mud?Also can you lay strips around the peremter of the shower floor to screed off of and leave then in place?


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