Tile over hardwood

[Tuleya]

When putting tile over hardwood I know that I have to put cement board down first. Do I need to put anything between the cement board and the floor, or can I screw it directly into the hardwood?

[Unregistered-BobF]

I think you are going to need a layer of plywood floor grade sheathing between the two. Hardwood flooring will expand/contract significantly but the plywood will be more stable.
The latest method (recommended by the Tile Council of America) is to set the backerboard in regular thinset but use latex modified thinset for the tile.

[Woodflooristcom]

How can you even suggest such a thing?? (grin)

I would agree that you do need to put a layer of plywood under the cement board if you are going over the hardwood. Locating the joists under the flooring so that you are fastening the plywood thru the flooring and into the joists would also help.

The thinset under the cement board is to fill voids and not to bond the cement baord down which is why you use unmodified.

If you choose to take up the flooring you might find this site helpful.

http://woodfloorist.com/1/takeupflooring.html

Franklyn

I Teach Wood Floors Online and Offline

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