Question regarding where Tile meets Hardwood: Elevation

[rlarson]

Hi Folks, and thanks for putting up with my newbie questions.
We did a total house renovation, down to replacing all floor joists, plumbing, electrical, windows, and roof. The only thing remaining from the original 1949 structure are the four exterior walls. Sounds like fun, huh?

I installed 3/4" T&G OSB as the subfloor throughout. The floor is flat. I plan to install 8" X 8" ceramic tile in the kitchen area. I want to use RedGard decoupling mat. The tile will meet and abut 3/4" hardwood where the tile ends at the kitchen end.

How do I ensure that the tile will be the same height as the hardwood? Should I use a 3/8" notched trowel for the decoupling mat and the tile install in an effort to bring up the height of the tile to 3/4"?

Is it advisable to paint the OSB subfloor with RedGard moisture barrier UNDER the de-coupling mat? I only ask as the potential for H2O entering the kitchen area has me concerned as I live in a place where the H2O accumulates outside the kitchen at times.

Thanks in advance! Rick

 

[highup]

The most important thing right now is adding another layer of material over the OSB because I don't think you can put tile over a 3/4" subfloor especially tongue and groove OSB.
I'm not a tile guy, but I'd think maybe if it was 1 1/4" plywood it might work.
The membrane doesn't add any strength to the OSB.

 

[highup]

From the sounds of your project for a minute I thought your name was Tom.
Sorry that was an inside joke others here will get it.

 

[Floorist]

Check at the "JohnBridge" forum. They have a chart that tells what you need for tile.

 

[havasu]

John Bridge forum is a fantastic source for different tiling techniques. It is also a great place to get some ideas for beautiful tile work.