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Az Framer 04-18-2013 06:26 PM

travertine on concrete
I am installing 18 x 18 travertine on a concrete bathroom floor . The concrete length wise is sloping 1/8 per ft . Should I use a self leveler or just go with it ? If I use a self leveler , what works well on old concrete ?

JazMan 04-18-2013 07:58 PM

Hi AZ,

1/8" per ft. is quite a bit, it'll be noticeable. Use a SLC and make sure you use the appropriate primer as directed. Be careful how you proceed cuz it's easy to create hills where non existed. The product needs a little help to flow, it doesn't really level itself.

By old concrete, do you mean just old, or is it dirty or stained? It's gotta be clean with no foreign film on it.

Once you improve the level of the concrete, make sure it's flat. Flat is more important than level.


Az Framer 04-18-2013 08:23 PM

The concrete had some carpet that was glued to the concrete . I have been going over it with a wire brush . Some of the stuff is coming up . About 25% of the glue is holding to the concrete .

JazMan 04-18-2013 08:33 PM

Use no chemicals. Try this;

Az Framer 04-18-2013 08:35 PM


Thank You .


Az Framer 04-22-2013 06:31 PM

travertine on concrete
After I finish all the scraping and get the SLC work done . What is better , thinset mortar or mastic ?

I like the mastic because I can do some work , then put the lid back on till the next time .

oh'mike 04-22-2013 07:27 PM

Powdered modified thinset---mastic ---never---ever---use that on a floor---

To many reasons not to ,but here are 2---
1. It will take weeks or months to dry----if it ever does.

2. moisture from the slab or even a spill will dissolve it----

C. It might stain your marble

JazMan 04-22-2013 08:20 PM

Mastic makes little sense for ceramic in general except for a backsplash, never ever for natural stone. Mastic a concrete is beyond bad.

Use thinset mortar which comes only in a bag, never use pre-mixed stuff.


pgc555 04-23-2013 08:36 AM

Let me add that you will definitely need to Back Butter that Travertine tile.
If your not sure what Back Buttering is, it's the process of using the FLAT side of the trowel to the BACK side of the tile to "burn-in" thin set and get full coverage. After that you flip the tile and install into the COMBED thin set on the floor. With a big tile like that you will need to support the tile on something to assist you. Do a search for "Back-Buttering on google , there has to be some information out there.:whistling2:

JazMan 04-23-2013 03:08 PM


Originally Posted by pgc555
Let me add that you will definitely need to Back Butter that Travertine tile.

Good point.:thumbsup: I received mine today and plan to use it on the job I'm starting tomorrow.


oh'mike 04-23-2013 04:20 PM

I need one of those----I must keep up with the other guys!

On huge tile like yours--consider using leveling clips---these will pull the tiles up and prevent lippage --

Lash is the system I use----(By QEP) there are other systems that are better,but these have always worked well for me.

pgc555 05-05-2013 07:29 AM

Any update on this job?

Az Framer 05-05-2013 10:12 AM

travertine on concrete
pgc ,

Thanks for the tip on back buttering . I watched the video , very good .

This job is in a bathroom that is not used too often . So I am doing it after work , when I have time .

I have just about finished removing the old carpet adhessive .

The next step is to fill in a low spot with some slc .

The only product that I have found in town here ( it is a small town ) , is ' Level Quik ' . It is a bag mix . The store also sells a latex primer by the same name .

Have you heard of this brand ?


pgc555 05-05-2013 11:03 AM

Sure, That's a CBP ( Custom Building Products ) material. You probably been shopping HD? This is a good product - mix like it says - open time about 15 min before it starts to set up, You will be fine!

Az Framer 05-05-2013 06:48 PM

travertine on concrete
pgc ,

The slc I found was at a Tru-Value store . I love HD , but the nearest is 1 1/2 hours away .

I can't wait to get done with this prep work , so that I can put down some travertine .

I have learned , the hard way of course , that good prep make for a good finished product . Thanks everyone for your input .


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