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Old 05-25-2008, 04:15 AM   #1
Plumb Crazy Purple
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Thin set mortar?

Hi Guys,
I laid down durock on the floors and the walls. I'll be using porcelain tile in the kitchen and stone and ceramic and some glass in the bathrooms. I know I need to use the fiberglass mesh tape at the seams and corners of the durock. Should I mud that with Thinset and let dry before I actually tile? Can I just use a modified white thinset for the floors and wall for the different materials? I'm also planning on a heated floor. Any pointers for that? I haven't quite decided on building a "booth" in the kitchen or just having a small table. What would happen if I placed that heated floor under the booth?
Thanks in advance for your advice.
-Peter
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Old 05-25-2008, 05:55 AM   #2
kerdibird
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Go ahead brother.
I don't think you'll need heating under the island.
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Old 05-25-2008, 06:50 AM   #3
scuttlebuttrp
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You can tape beforehand or as you go. Doesn't matter. Doing it before can leave humps, doing it while you work can be annoying.

White modified should be good for everything except MAYBE the glass. Check with the glass manufacturer to see what their reccomendation is.
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Old 05-25-2008, 07:11 AM   #4
Ken
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Call me crazy.. but did you thinset the durock to the floor before fastening it?
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Old 05-26-2008, 01:45 PM   #5
Plumb Crazy Purple
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Thanks guys. No, I didn't thinset the durock before laying it down. But I did screw the heck out of it, about every 6-8 inches.
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Old 05-26-2008, 01:58 PM   #6
Ken
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It is highly recommended by every pro here to thinset your durock/cbu to the floor before fastening it.
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Old 05-26-2008, 11:52 PM   #7
Plumb Crazy Purple
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Do you lay the thinset directly on to the plywood subfloor? Is this to help fill voids?
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Old 05-27-2008, 09:41 AM   #8
Mike2
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Yes, thin-set is spread directly onto the plywood sub-floor, filling all voids between it and the cement board. You really need to do this, Peter, or the odds of a successful outcome will not be in your favor.

You can read more about the installation requirements for Durock here, see page 5 for floors: http://www.usg.com/USG_Marketing_Con...tion_Guide.pdf .

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