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cement backer board or not?

2427 Views 4 Replies 4 Participants Last post by  Bud Cline
I want place new tile over existing tile for my hearth. I have a 1920's home, the existing tile cannot be removed because that is all there is there. I am extending the tile out onto the old hardwood about 6". do I need backer board to do this? I don't want to put it down because we upgraded to a sealed gas fireplace and I would have to adjust the height of it if I place the backer board- I would only have to slightly adjust the hieght of the front facing without the backer board. If I don't put the backer down will my new tile crack?
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