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Unread 07-22-2005, 04:23 PM   #1
dr47
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Kohler Villager tub install questions

I have several newbie questions regarding the installation of a Kohler Villager bathtub and prepping the surround area for tile:

1. Getting the tub perfectly level was challenging. At this point it is perfectly level from side to side but slopes very very gently toward the drain. Is this acceptable?

2. My CBU (1/2 inch Hardibacker) currently comes to within 1/4 to 1/2 inch of the top of the tub's flange. Since the tub does not have a very defined flange, this creates a pretty sizable gap. I used 4mm poly as a barrier behind the CBU and it currently overlaps the flange slightly, poking out into the tub to be trimmed to fit. Three questions: 1. Is 1/2 inch too large a gap? 2. What should I seal the gap with? Silicone caulk? How to keep it from falling into the gaps between the wood studs? 3. When sealing it, do I leave the poly overlapping the nearly nonexistent flange?

3. The outside edges of the tub curve downward, but the CBU is cut straight across (difficult to match the curve of the tub with a clean score in the CBU). This creates a very small curved triangle at the outside edge on each end of the tub. Can a 4x4 tile bridge this void, or what would be appropriate to fill this with?

Thanks in advance for any advice you experts might have!

-DR
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Unread 07-22-2005, 05:48 PM   #2
muskymike
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Hi DR welcome. Is that your name? The gap can be filled with silicone and the area that didn't get covered by the cbu will be covered by the tile. Not a problem. If the poly is hanging out just trim it off.
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Unread 07-22-2005, 05:56 PM   #3
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Hi DR, welcome.

The water should fall toward the drain when the tub lip is level. The gap depends on the tile thickness. The gap needs to be about 1/16 larger than the tile thickness.
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Unread 07-22-2005, 08:23 PM   #4
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And any concerns you have about the poly flopping back behind the tub.....just lift it up a bit and throw a bead of silicone under it (right on the flange of the tub). Lay the plastic back down in the bead of silicone. Then trim it off after the silicone has cured (24 hours).

If the tub slopes too much, it's difficult to install shower doors and have them look good and level. Is the tub level to within 3/16" over the length of the tub? Or is it more?

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Unread 07-27-2005, 09:18 PM   #5
dr47
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Thanks guys. This forum is an amazing resource! I hadn't even thought far enough ahead to realize a slope would be exaggerated by the shower doors...

So I'm squared away on my first two questions:

1. I checked and my slight slope is within tolerances. Less than 3/16" so I think I'm ok.
2. Sounds like my 1/4 to 1/2 inch gap between the CBU and tub flange is also ok and will be bridged just fine by 4x4 tiles. (I will put a bead of silicone around the flange under the poly as suggested)

Which leaves me with #3:

Since my CBU scoring skills limit me to straight lines, I've got a triangular void where the outside edge of the tub curves downward. What should I fill that void with? I'm no artist but I've attached my best shot at a rendering of this gap.

Thanks for the guidance.

-Dylan
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Unread 07-27-2005, 09:29 PM   #6
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Hi Dylan, you can put some cbu tape over it and mush some thinset into it. Are you bullnosing down the side of the tub or just to the edge of the tub?
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Unread 07-27-2005, 11:05 PM   #7
dr47
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Thanks Mike,

Just going to the edge of the tub. Due to the small size of the bathroom, the door trim will come to the edge of the tub, so no bullnose there.

In fact, the tile I am using has no bullnose- just 4x4 field tiles. I am not tiling all the way to the ceiling, just up to about 6' or so (all the way to the ceiling would be a bit overwhelming in a bathroom this small I think) Any suggestions on how to best finish that top edge? These tiles have uneven edges, not straight lines. I was debating whether to leave the edge raw and caulk it (above eye level) or trim it out with a piece of sealed wood of some sort. Anyone have any tricks for what visually works best that might be useful?

Thanks,

Dylan
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Unread 07-27-2005, 11:30 PM   #8
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Hi Dylan, I only have done one like that with the tile you are using. I grouted the top of it. It was higher than eye level though. Those squirrelly edges are tricky to caulk. You could try capping it off with a piece of rabbited wood like you suggested.
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Unread 07-28-2005, 01:47 AM   #9
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Or perhaps some bullnoses from another tile line. There is nothing stopping you from adding complimentary or contrasting colored bullnoses to spice it up a bit. Gets ya thinkin......
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