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Unread 11-24-2008, 06:11 PM   #1
Tilling Tim
Join Date: Nov 2008
Location: Gainesville, FL
Posts: 1
Cool Bath renovation

I am remodeling my master bath. I have finished the work including tiling for the shower and countertops. I have the floor to complete. It is about 8.5 by 8.5 feet in area. There is an adjacent toilet area that is about 3.5 by 5 feet. The floor is concrete slab. The house is 19 years old. I removed the old tile cleaned up the floor with a diamond cup wheel on an angle grinder. There were no cracked tiles it was just out of style. The main area slab is crack free and in very good shape. The toilet area slab has a hairline crack running down the center of the long dimension. The height of the crack is the same on both sides. If the crack propagates it will not run into the main bath area. I was going to use Ditra on both areas. I am having second thoughts since it seems to be a lot more work and I'm not sure it is necessary for this size bath. I will use the Ditra if you think it wise. If you think it advisable to use the Ditra I would like a recommendation on thin set. I know Schluter recommends using non-modified thin set morter. I bought some from Home Depot. Experimenting with it it seemed to have limited open time. My guess is that that is what you get with non-modified thin set. However, I am not that fast setting tile so this concerns me. I know the notch size Schluter recommends. I can probably find the correct trowel size but how important is that. They specify 1/4 x 3/16 which is awful close to the common 1/4 x1/4. I have greatly enjoyed reading the advise in the forum and any help would be greatly appreciated. Thanks
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Unread 11-24-2008, 06:33 PM   #2
Veteran DIYer -- Schluterville Graduate
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Join Date: Dec 2006
Location: SE Tennessee
Posts: 8,884
Welcome to the forum, Tim.

Schluter doesn't tout Ditra as a crack isolation membrane.

For such a small area, I think I would try an applied liquid crack isolation membrane like RedGard.

As for unmodified thinsets, you really can't find a good one at Home Depot. So, don't let your experience taint your opinion of all unmodifieds. There are some really good ones.
Dan - a DIYer in SE Tennessee
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Unread 11-24-2008, 06:41 PM   #3
John Bridge
Join Date: Mar 2001
Location: Rosanky, Texas
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Hi Tim,

Home Depot sells CustomBlend unmodified mortar. It's the only one they sell, and I advise not using it. It's really not worthwhile. As Dan indicates, you can get a gallon of RedGard and use that as your crack isolation.
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