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Unread 07-05-2011, 09:38 PM   #1
Got4wd
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RedGard questions

New to the forum and new to tile floors so figured this would be the place to go. Quick run down of my project. Concrete floors with some decent cracks. 3/16 is largest and home is 11 years old. Travertine, 16x16 tiles are going in. I have been told lots of different ways to apply the redgard so my question is can I just use the redgard on the cracks only? Seems like I don't need to do the whole floor as 90% of the concrete is crack free. This is also a starter house for us so I would like to keep the budget as low as possible. Thanks for the help.
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Unread 07-05-2011, 10:53 PM   #2
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Welcome, Jeremiah.

The only opinion that's really meaningful to you in response to your question is that of Custom Building Products, the manufacturer.

You should very carefully read and follow their published installation instructions.

The product does indicate it meets industry standards as a crack isolation membrane (ANSI A118.12) and can be used for particular areas or the entire installation.

You really need to check very carefully to see if there is any height differential between the sides of those bigger cracks. Three-sixteenths of horizontal opening is significant and I'd be very surprised if the floor is still perfectly in plane in that area. We're talking any vertical differential at all.

Nobody's crack isolation product will want to be your friend for anything other than purely horizontal movement.

My opinion; worth price charged.
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Unread 07-05-2011, 11:07 PM   #3
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Thanks for the response. Yes the cracks were raised but I did grind them flush with my Hilti DG150 grinder. The cracks are smooth with the existing floor so I think I should be ok?
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Unread 07-05-2011, 11:14 PM   #4
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No, Jeremiah, 'fraid it doesn't work that way. Once that slab has shifted vertically you have a structural problem. Perhaps a minor one, but you have one.

You can grind the surface flat, but you haven't corrected the problem and it will move again. Probably when you have a significant change in soil moisture levels with changing seasons or particularly wet or dry weather. It may never get bad enough to cause you any other serious problems, but it's gonna crack your tile installation. Hang your hat on that one.

Still, it's entirely up to you. If you have a good tolerance for a little cracking in your floor, you may wanna go ahead with the installation. If not, you might wanna consider some other floor covering in that area.

My opinion; worth price charged.
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Unread 07-12-2011, 10:28 PM   #5
Got4wd
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Pinwheel hopscotch pattern do it or don't?

We are doing our floors in a 16x16 tumbled travertine. I also have 8x8 tumbled travertine tiles I can use as a pinwheel pattern. Question is, is this a "good pattern" that people like? We will be selling the house eventually so go with that pattern or go with a regular layout?
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Unread 07-12-2011, 11:35 PM   #6
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Jeremiah, it'll help if you'll keep all your project questions on one thread so folks can see what you're working on and what's been previously asked and answered. We can give it a more generic title any time you'd like.

Purely aesthetic question, that. I'd ask Mrs. Jeremiah what she likes and that's the pattern I'd use.

My opinion; worth price charged.
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