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Unread 09-19-2010, 07:36 PM   #31
jadnashua
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A pro worth his salt will check the deflection and the rest of the floor's requirements, but there a just as many out there that will just install it, not knowing.

Click on the 'Deflecto' in the blue bar above, measure your joists, and put those numbers into the tool. It will tell you if the joists are sufficient for either ceramic or natural stone. If it fails, you have to either fix it, or accept the fact that it may not survive. Problems don't always show up immediately...sometimes it can take years.
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Unread 09-30-2010, 03:20 PM   #32
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Well to all of you helped me, thanks! Overall my travertine floor looks OK. There is lippage in numerous areas, like you said there would be, but not so bad I want it replaced. I had a professional install it ( and asked him about the TLS system -he had not heard of it) but not seal it. It has been down for about 3 days now and I want to seal it myself. I like the look of that enhanced sealer but don't know what brand/manufacturer to purchase. The tile was NOT sealed before the grout was laid and I would like to know if the sealer for the tile will seal the grout also. Ive read the threads that said I should have sealed first, yeah, I screwed up. Tell me please, what brand of sealer do you recommend.

Thanks,
Brad
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Unread 09-30-2010, 04:01 PM   #33
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Go to Lowes and get the dupont stuff in the brown bottles made for marble.
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Unread 12-12-2010, 01:47 PM   #34
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ditra on shower walls

I went to the liberry and looked for ditra use on shower walls. If there is any info there I missed it. I have plenty of ditra left and wondering if using this over cement board is acceptable. I'm planning on using my leftover travertine on the walls on the shower walls only, not the floor. Give me your thoughts please.

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Unread 12-12-2010, 02:00 PM   #35
Brian in San Diego
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Brad,

Ditra is for floors only. The Schluter waterproofing membrane for showers is Kerdi.

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Unread 12-15-2010, 01:26 AM   #36
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thinset

I'm wanting to put down ditramat in my bathroom on top of plywood. I cannot find a dealer where I live that carries Laticrete, versabond, or any of the others that you mentioned in the posts. I went to Lowes and HD and they dont have any of the ones you recommend. I purchased one from a local LARGE lumber and flooring supply store called FULL FLEX. It is a latex modified thinset and is manufactured by Tec. Ive never heard of them and don't want to put it down without the OK from all of you. It is gray in color and the tile is travertine. Please let me know what you think.

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Unread 12-15-2010, 05:29 AM   #37
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Tec is a good company. They are my go to after Laticrete. Lowes should have something good as well. Up here they are the Mapei dealer. best of luck.
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Unread 12-15-2010, 10:01 AM   #38
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thinset

Thanks Chris!
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Unread 12-15-2010, 10:11 AM   #39
Brian in San Diego
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Brad,

I merged your thinset question in with your original thread. One project, one thread is the way we roll.

I would not use the TEC full flex to set the travertine if it's grey in color. I would want white. You do have a decision to make regarding installing stone over Ditra. Stone is heavy and it tends to "settle" in regular thinset causing lippage after the tiles are set. The recommendation with stone is to use a marble & granite medium bed mortar. Now for the dilemma. All medium bed mortars are modified. By the letter of the law you shouldn't use modified thinset to set tile on Ditra.

I will tell you that I have done two projects over Ditra and used medium bed mortar both times without a problem, My advantage...I had plenty of time to let the mortar cure.

Tec does make a medium bed mortar and surprisingly enough they call it "medium bed mortar".

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Unread 12-15-2010, 10:46 PM   #40
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thinset

Thanks Brian and sorry about starting a new one, it was late and I know better. I have 2 questions for you now as Im confused. I'm putting the Ditra directly on top of plywood ( deflecto and all sublfloor has ckd ok) and I thought I was supposed to use MODIFIED thin set between Ditra and plywood, and UNMODIFIED between Ditra and tile. Could you set me straight please. This store didnt have white, but why white??? Does it matter?? As long as you are here, I have an Onyx shower pan and am wondering what type of adhesive you would use to bond to floor(plywood). I am dry fitting everything as I realize from listening to all of you how much I DONT know. Thanks for your help and anything else you think is important please let me know.

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Unread 12-16-2010, 12:23 AM   #41
Brian in San Diego
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Brad,

By the letter of the law you are 100% correct. Modified thinset to stick Ditra to plywood and unmodified to set tile over Ditra. That being said I think every person has to weigh what they are most concerned about...a Schluter warranty or a perfect installation. When I set 18x18 travertine my biggest concern was a perfectly flat, level floor with no lippage. I worried that those tiles may "sink" into the thinset after I had them set and lippage would be the result. I opted to take my chances and use a medium bed mortar even though it would void my Schluter warranty. I got the result I was looking for. I did leave an extended period of time before grouting to allow the thinset to cure.

The reason you want to use white thinset with travertine (a relatively light colored stone unless, of course, you are getting walnut or some other darker shade) is to eliminate the possibility of the grey thinset staining or showing through the thin spots of the tile. Most travertine is filled and hone on one side only and there are voids on the underside. These voids when filled with grey thinset can alter the color of the tile. White thinset tends not to do that.

I don't know anything about your shower base. I suggest thoroughly reading the manufacturer's installation instructions.

Brian
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Unread 12-16-2010, 01:18 AM   #42
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travertine

Thanks Brian, I really appreciate your explanation and advice. I had a pro lay my lower level with travetine and there is much more lippage and some of it I made him fix. He was not happy about it either. I guess Id just like to do this myself as I will take my time and make sure its correct. Do you use a TLS or just a level and eyeballs? I dont want to spend the money to buy TLS system as Id really have no use for it after this job. I would like to use the correct mortar what manufacturer do you recommend?Id like to know what kind of grout you use also, if you dont mind. I wish there were instructions for this shower pan, there were none. It is EXTREMELY heavy and I may not need an adhesive, but I dont want it to shift at all after its set. I guess Ill just call the Onyx company. I wish you lived out here, Id just hire you.

Thanks again,

Brad
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Unread 12-16-2010, 01:44 AM   #43
Brian in San Diego
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Brad,

My master bath floor was laid by sweat, perseverance and a Tavy tile puck. It was a small job, but I really took my time.

The entry was a far more complex installation with different materials. I did use the TLS for that job.

I used CBP Marble & Granite medium bed mortar on the upstairs and Laticrete 220 Marble & Granite for the downstairs. Upstairs I used CBP PolyBlend grout in Canvas. Downstairs I used Spectralock epoxy in parchment.

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Unread 12-16-2010, 07:29 AM   #44
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Quote:
I dont want to spend the money to buy TLS system as Id really have no use for it after this job.
Brad,

I would urge you to reconsider your position on TLS. I just used the TLS to set a 400 sq ft outdoor patio in travertine. It's a great system, espcially for inexperienced tile setters. It will greatly improve the quality of your finished floor - I know this from experience.

It's pricey, but you will be able to sell the caps and the installation tool when you're finished. It's a great system and it does work, IMO.
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Unread 12-20-2010, 10:50 PM   #45
b82
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Merkrete

Not much info here on a product called MerKrete, so, I would like your input once again please. I have purchased Hydroguard for duroc prior to tiling AND MerKrete 720 white marble polymer modified dry set mortar. The 720 is for ditra to plywood. Secondly, do any of you have any experience with Onyx shower bases?? The base I purchased is 5ftX3ft and EXTREMELY HEAVY with one open side and 3 sides with a 1/2 inch tall X 1/4 inch wide lip. Question; Would you install the duroc "over" the top of this lip, or inside of it? Any suggestions much appreciated.

Thanks,

Brad
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