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Discussion Starter #1
We are in the process of doing our first home renovations in our first house which is including doing some sort of covering on the kitchen floor. The house was built in 1970 so has old wooden floor boardoards, we would like to tile but one tiler that we got a quote from said that tiling wouldn't work as the tiles would crack on these old boards within a couple years, another tiler told us we could if we use cement sheeting with a flexible good grade adhesive. We really need some advice on this as we are pensioners and can't afford to rreplace stuff after it is done Any help appreciated
 

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Framing Contractor
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Installing cement board under tile is generally the way it is done now a days. There are other membranes that can be used, but generally they are more expensive. A tile floor should never be laid directly over a wood floor, no matter how old or new the wood may be.
 

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Discussion Starter #3
so even though our floorboards are old and squeak lol is it safe to lay tiles providing there is that cement board?
 

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so even though our floorboards are old and squeak lol is it safe to lay tiles providing there is that cement board?
Not necessarily. More screws could be added first to see if that resolves the squeaks. The floor joists underneath also need to be examined to determine if they can carry the extra weight of the tile. Find a tile guy that you trust and discuss these options with him.
 

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you will have to put a layer of plywood over the floorboards in order to tile. then 1/4 inch cement board over that with thinset under the cement boardand the cement board screwed to the plywood. here is a link to a deflection calculator. this will tell you if your joists will support a tile floor. you just fill in the info, unsupported length of the joists, height and hickness and spacing and type of wood if you can find it on the joist if you have access.most joists are stamped somewhere.


http://www.johnbridge.com/vbulletin/deflecto.pl
 

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I think you also need to consider how much flex your floors have. If they are very rigid, then plywood and cement board should work. But, I have a friend that had it installed that exact way and it cracked anyway. He ended up ripping it all out after several attempts.
 
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