Tiling over old tile adhesive? A good or bad idea?

[Tyrrelled]

I'm starting my first tiling project: The bathroom - walls and floor. I've been doing DIY for a fair few years but just haven't ever tiled. All the advice points towards good preparation, so I'm really working on that. As I'm removing the old tiles I'm finding that I'll have to do a fiar bit of work on the walls to bring them up to standard. But for the floor, when I remove the old tiles I'll be covering it again completely and so wonder how important is it to remove the old adhesive? Can I tile on top of the old adhesive or is it better to remove it?

Any preparation tips welcomed!
Thanks a million

 

[mathewleo]

Always remove the old adhesive before tiling. The old adhesive may keep the tiles loose. So its better to safe than sorry.

 

[tictic]

if your having problems removing the old cement adhesive,then use a slc over the floor(a latex one)..

then dry lay your tiles to see how you cuts are,...sides off room/door thresholds...etc...

seal tiles..(if needed)...
work clean..wash along the way...

 

[Tyrrelled]

Thanks for your advice guys. It took a long time to get the walls back up to scratch, the plaster etc took ages to dry as it very cold and humid here (I live in Milan) and I was back in Ireland for long break over Christmas. Before then I was just doing a few hours here and there as work allowed. I have a week before I get back to work so I'll be finishing it off before I go back to work... Hopefully!