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right thinset choice??
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posted
I'm about ready to tile my bathroom (tile on order) and need to confirm my choice in thinset.

My floor is 2 layers of plywood, then nuheat electic floor mat, then ditra and finally 13"X13" porcelin tile.

I plan on using modified thinset between the plywood and the electric floor mat and between this and the ditra. Then unmodified between the ditra and the tile. Is this correct?

And what about the wall tile on cement backer board...modified or unmodified thinset or mastic? the tile is 8" X 10".
 
Posts: 28 | Registered: 17 April 2007Reply With QuoteReport This Post
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quote:
Originally posted by dino66:
I'm about ready to tile my bathroom (tile on order) and need to confirm my choice in thinset.

My floor is 2 layers of plywood, then nuheat electic floor mat, then ditra and finally 13"X13" porcelin tile.

I plan on using modified thinset between the plywood and the electric floor mat and between this and the ditra. Then unmodified between the ditra and the tile. Is this correct?


Correct.

quote:
And what about the wall tile on cement backer board...modified or unmodified thinset or mastic? the tile is 8" X 10".


Modified thinset. Specifically, you want to use one of the newer lightweight thinsets now available. Custom's Megalite, Mapei's Ultralite, and Laticrete's 255 are all good choices. When mixed properly, they'll allow the tile to "hang" from a level line just the same as mastic will, without the problems that mastic presents, when used improperly. BEsides, it's cheaper than mastic! Smiler


"Whether you think you can, or you think you can't, you're probably right."

http://www.creativeceramicandmarble.com
 
Posts: 135 | Location: Bridgton, Maine | Registered: 18 August 2006Reply With QuoteReport This Post
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thanks Bill
 
Posts: 28 | Registered: 17 April 2007Reply With QuoteReport This Post
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Over plywood, Schluter recommends modified thinset to bond it to the plywood, and then unmodified between the Ditra and the tile.


"Whether you think you can, or you think you can't, you're probably right."

http://www.creativeceramicandmarble.com
 
Posts: 135 | Location: Bridgton, Maine | Registered: 18 August 2006Reply With QuoteReport This Post
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Bill, what is the problem with mastic...I read in a few posts that it can cause "problems" but I'm unsure what "problems" means...so why do people use mastic if thinset is better??? Remember I'm just a beginer here so pardon all the questions.
 
Posts: 28 | Registered: 17 April 2007Reply With QuoteReport This Post
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Not a problem. That's what I'm here for. mastic does have its uses, although they're much more limited than most people, including pros, think. The ONLY time mastic should be used, is with tiles 8x8 or smaller, and on walls in dry areas. That would be anywhere other than showers or tub/shower combos. If you're going to do a tile wainscot in the bathroom, you can use mastic, or a kitchen backsplash-- things like that. it can't be used on the floor, because it won't completely dry for months, and in that time, both tiles and grout will crack out on you.

As far as wet areas go, moisture can reemulsify mastic (soften it back up), and once that happens the bond is lost and won't come back.

The reason people like to use it so much is that it's easier to use. You don't have to mix it, and when you put a tile up, it stays where you put it. Although you have to mix the lightwieght thinsets, they will do the same thing for you, with reference to performance. Plus, they'[ll give you a much stronger bond.


"Whether you think you can, or you think you can't, you're probably right."

http://www.creativeceramicandmarble.com
 
Posts: 135 | Location: Bridgton, Maine | Registered: 18 August 2006Reply With QuoteReport This Post
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thanks Bill
 
Posts: 28 | Registered: 17 April 2007Reply With QuoteReport This Post
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What is the distinction that it is unmodified thinset? Some say modified some say fortified, but they don't specifically say unmodified. I have looked at the 2 big guys (HD and Lowes) and want to make sure I get unmodified thinset for the Ditra/tile install.
Thanks.
 
Posts: 4 | Location: Virginia | Registered: 12 December 2007Reply With QuoteReport This Post
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quote:
Originally posted by RCI:
What is the distinction that it is unmodified thinset? Some say modified some say fortified, but they don't specifically say unmodified. I have looked at the 2 big guys (HD and Lowes) and want to make sure I get unmodified thinset for the Ditra/tile install.
Thanks.


If you see any of the following words:

Modified
Fortified
Latex
Acrylic
It's modified. As for what to get at the box stores, At HD, they usually have the Masterblend, which is Custom's low end unmodified, and is really garbage. If you go to Lowes, you're going to find one of two-- either you're going to find Mapei's products, in which case the product you want is Kerabond (sometimes they carry Keraflor which is Mapei's low end product, which you also don't want), or they'll have Laticrete, in which case you want their 317 thinset.


"Whether you think you can, or you think you can't, you're probably right."

http://www.creativeceramicandmarble.com
 
Posts: 135 | Location: Bridgton, Maine | Registered: 18 August 2006Reply With QuoteReport This Post
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Thanks Bill! I will check out Lowe's as I know HD doesn't have it. I don't think my Lowe's has Mapei...I have used Kerabond before with the additive. I take it to be unmodified, you don't use an additive...just water.

Thanks again.
 
Posts: 4 | Location: Virginia | Registered: 12 December 2007Reply With QuoteReport This Post
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you got it. Smiler


"Whether you think you can, or you think you can't, you're probably right."

http://www.creativeceramicandmarble.com
 
Posts: 135 | Location: Bridgton, Maine | Registered: 18 August 2006Reply With QuoteReport This Post
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Ok..one more question. Am installing travertine over the Ditra membrane around tub and the ditra on the floor. Is an unmodified ok with natural stone? I usually use the Marble/granite from Lowe's...but should I go with the Megabond without the additive?
Thanks
 
Posts: 4 | Location: Virginia | Registered: 12 December 2007Reply With QuoteReport This Post
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quote:
Originally posted by RCI:
Is an unmodified ok with natural stone?


Absoultely. Now a question for you. You say you're suing Ditra around your tub, as well as on the floor. Are you using Ditra on the walls? If so, don't. If you want to use a membrane, Kerdi would be your choice.


"Whether you think you can, or you think you can't, you're probably right."

http://www.creativeceramicandmarble.com
 
Posts: 135 | Location: Bridgton, Maine | Registered: 18 August 2006Reply With QuoteReport This Post
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Yes..I meant the Kerdi membrane...I said Ditra membrane. Using that on walls...Ditra on floors...with the Megabond by itself. Good thanks
 
Posts: 4 | Location: Virginia | Registered: 12 December 2007Reply With QuoteReport This Post
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