Hi

I'm just about to tile a conservatory. There are existing ceramic tiles on the floor - which are very sound. I am putting 45x45 porcelain tiles over the top of them. I was going to prepare by simply washing down with sugar soap to degrease. Then use Weber Rapid SPF as my addy.

Is this the way to go or have I missed something obvious out? I presume the SPF will stick to just about anything. Grout is flexible stuff as well.

Paul

i would give the tiles a really good roughing up to give the surface some grip

you can use an attachment form tradetiler for your angle grinder, dave has the pic somewhere

ed

hi
If you 100% sure that they sound then apply ''Betokontact'' made by ''knauf'' with brush or roller, it will give you key to grip for adhesive

Hi.

A couple points to think about on this floor are

1: Your tiling will only be as sound as the previous tiling.
2: There will quite hot days in a room like that , so you have to be sure that your tiling will stay adhered, as you have the substrate expansion/contraction and then the first covering of tiles and then your new covering, which will all move at different rates.

This is an ideal job given the room conditions for an uncoupling membrane if you are deffo going over the old tiles.

Also a point to consider is if the tiles are glazed and not a matt finish then an S2 grde adhesive will be need for adhesion purposes.

And as you say a good clean with a degreaser will usually suffice.

Just a few points to consider before hand.

Originally Posted by pt44

Hi

I'm just about to tile a conservatory. There are existing ceramic tiles on the floor - which are very sound. I am putting 45x45 porcelain tiles over the top of them. I was going to prepare by simply washing down with sugar soap to degrease. Then use Weber Rapid SPF as my addy.

Is this the way to go or have I missed something obvious out? I presume the SPF will stick to just about anything. Grout is flexible stuff as well.

Paul

That's the way I would do it as well mate