Preparing to tile a single brick wall

Hi guys,

I am getting ready to turn my existing laundry into a combined 2nd bathroom and laundry. Its located at the back right hand corner of the house (50's built brick & tile) and the wall is only single brick around the laundry, with mortar or render on the inside which is painted. The paint on the inside of the wall has completely come away in some patches over time with all the moisture so obviously I have to seal the outside thoroughly to stop the moisture getting through the wall and ruining the tiling... My main two questions are:

I'm going to get rid of the flaking paint with a wire brush - can I then tile over the render (or mortar or whatever it is on the inside of the wall)

Also I am planning to render the exterior of the house at some point, but not straight away. If I seal the exterior bricks outside the laundry will this affect the rendering job later?

Thanks for your advice.


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