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brasilmom 09-30-2012 06:26 AM

Radiant flooring under natural stone

We are replacing the pedestal sink on the children's bathroom, so we decided to go ahead and change the vinyl flooring, add radiant heat, put natural stone, and also replace the old toilet. We will not mess with the shower area, other than replacing the shower itself, and add a fresh coat of paint.

Now, the bathroom in on the main level, we have a basement, so the flooring is not concrete. Here is what I am not sure about:
- do I need to use an underlayment such as Schluter Ditra XL?
- if I need to use the underlayment, the order of things are: thinset, radiant mat, thinset, underlayment, thinset, tile, grout?
- is it recommended that I add a waterproofing membrane around the toilet?

Thank you. Be well


brasilmom 09-30-2012 06:37 AM

Oh, forgot to ask. I see that there are at least 2 types of radiant heat. One is on a "wool" type of fabric, and the other is on a wire mesh type of thing. So, which is best for my application? Should I look for this in a big box store or some other more specialized store?

nealtw 10-01-2012 05:54 PM

I've used the mesh thing with wire taped to it, kinda a bear to deal with but easy to cut the mesh and arange it where you want it. The other one looks easier to install but I think you have to order it made to fit the room. With the mesh one I think you would tape it place and install detra over it.

cjn79 10-01-2012 06:14 PM

The best system I have seen is the Warm Board subflooring. It has all the grooves cut for your radiant tubing and is covered by aluminum for maximum heat transfer. It is a phenomenal system which not only gives you maximum heat transfer but maximum efficiency as well. Check it out online. :)

cjn79 10-01-2012 06:20 PM

Oh never mind. Your doing natural stone. It's for standard flooring only I believe. :(

brasilmom 10-07-2012 09:50 AM

Thanks cjn79 for the info. It appears that this would be way more than I want for this small bathroom. However, as time goes by I may get more in depth with that for the bedrooms. A warm floor is a beautiful thing.
Thanks again. Be well

brasilmom 10-10-2012 06:06 AM

Ok, so now, we are almost done with the walls and ceiling. Today, if time allows, I will work on the floor. So, the floor that is there now is glued down vinyl. Is there a real need to remove this flooring before proceeding with the thin set, etc, etc? If so, what is the best way to get this done without causing damages to the subfloor?
Thanks. Be well

nealtw 10-10-2012 07:19 AM

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