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Unread 06-06-2006, 08:56 AM   #1
bjc506
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How to grout inner corner of kitchen backsplash

I'm installing a backsplash of Senecal Tile handmold 4x4 tiles in my kitchen. These are really colorful tiles about 3/8 thick. I've done tile floors a few time before but I am definitely not very experienced at this.

From a great book and video set, which I got at my local library, "Setting Tile" by Michael Byrne, Taunton Books and Videos, I know I need an expansion joint at the interface to the counter top and cupboards. I'll use some caulking material that matches my grout.

I am wondering if I should do this also at the inside corner of the backsplash? I am worrying about that joint cracking.

The grout I have is Mapei Ultra/color polymer-modified hydraulic tile grout (KER 700). From that I figure it is going to have some resistence to cracking, but is it adequate for an inside corner where the wall on each side are 8 ft 12 ft. I have laid the tiles onto the drywall, using Mapei Keralastic flexible mortar.
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Unread 06-06-2006, 09:30 AM   #2
Brian in San Diego
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Do you have a first name we can call you? The standard answer is to use caulking whenever there is a "change of plane" in your tile. That would mean you should caulk at the inside corner. In my kitchen, the original tile was grouted everywhere (no caulking). The grout between the countertop and backsplash has cracked everywhere, but the corners have not. The reason grout cracks is generally due to movement. I think you have made a good choice to caulk between the countertop and the backsplash. I think the corner is more of a matter of aesthetics. If grout would look better, I think I would grout it.

Brian
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Unread 06-06-2006, 10:48 AM   #3
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Thanks for your reply Brian,

I think the grout will look better, since finding well matching caulking probably won't be that easy. Also, the inside corner is really apparent when one enters the room.

I am still cutting tile to finish that part of the job, so I have a few days to think before I'll have to tackle the grouting.

Bob
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Unread 06-06-2006, 03:09 PM   #4
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Have a first name Bob? Jes messing wid ya Brian...

Howdy, Bob
If you grout in the corner and it cracks and if it's in that conspicuous spot, you may notice it and you may not. In any case, you could always scratch it out and caulk.. Caulking at the counter wall interface is essential cause it will crack...
You can also order sanded caulks from Mapei.. Lotsa alternatives...
Ya just gotta love it...

Oh, and are ya gonna seal it too?
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Unread 06-06-2006, 05:40 PM   #5
Brian in San Diego
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Hey Mudmaker,

Bob's avatar wasn't up when he first posted! I know I'm blind, but the avatar appeared when he answered my first post...honest. Come on, Bob, vouch for me here.

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Unread 06-06-2006, 05:51 PM   #6
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Ok - Ok a likely story..... Brian you get a pass Buddy...

Sorry, not seeing the first post - I just couldn't pass it up....
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Unread 06-06-2006, 06:01 PM   #7
1Eric
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Personally I caulk every inside corner with color matched caulk. Grout is going to crack because of the change of plane.
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Unread 06-07-2006, 10:05 AM   #8
bjc506
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Brian is absolutely right, on my first post I left out my name. Instead of simply signing my next post with “Bob” I went looking for a way to change my user name “bjc506” to Bob in my profile. I ended up using the avatar option, drawing out my name with the mouse in a little program I have. (I should have been cutting tile during all that....)

I really appreciate this forum. The question I asked has gotten multiple responses with lots of helpful comments. Thanks to everyone who is taking the time to answer.

Bob
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Unread 06-07-2006, 11:30 AM   #9
Brian in San Diego
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I feel vindicated! Hey Frank, can you save that pass for another time? I'm sure I'll say something stupid in the future!

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