floor Tiling over tiles . . . help me please.!!!

[nozzer]

Hi . . .

I have a tiled kitchen floor. the ceramic tiles are 300 x 300mm. They are rock solid. I have another tile (330 x3300)and I want to tile over the old ones. The internet suggests loads of different things, but all very different. Should I. . .

1) Sugar soap the old tiles.
2) Take a grinder to the old tiles, and grout to scratch them up? (If so, how much) ?
3) Paint the old tiles with BAL primer (If so, which primer and how many coats) ?
4) Use a flexible adhesive / grout ?

I look forward to anyones help / comments

Thanks

 

[Ian]

Hello Nozzer, is there any reason you can't remove the old tiles?

 

[nozzer]

Hi Brian . . .They are rock solid, it would take a lot of serious work. I thought it would be pretty straight forward to tile over the tiles but I do only want to it once !!!

 

[EverDon Tiling]

i would take the old tiles up imo you don't know whats under them they might seem solid you just don't know they shouldn't be to hard to get up.

 

[Andy Tiler]

Hi nozzer I would do 1and 2 and also apply a slurry coat of 1part cement and1part sbr primer,and paint it on,leave to dry then tile away with flexible adhesive (powder)..hope this helps


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[Andy Tiler]

Hi Brian . . .They are rock solid, it would take a lot of serious work. I thought it would be pretty straight forward to tile over the tiles but I do only want to it once !!!

1st choice is always remove the tiles if poss,


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[Dan]

If I was tiling a wall or a floor over existing tiles, it would have to be a floor. If a failure occurred at least I'm stubbing my toe and not having tiles fall on me in a shower.

As above. I'd remove if you can. Good thing with knowing they're fixed will is you know your substrate is strong so an SDS hammer drill should lift those tiles up quite easily as you can give it some welly.

Though if you are tiling on tile, as above with the slurry etc.

 

[nozzer]

i would take the old tiles up imo you don't know whats under them they might seem solid you just don't know they shouldn't be to hard to get up.

I was dreading to hear that, but thanks anyway !!

 

[Dan]

If it's concrete and they've been down a while. My guess is it would be very solid. You'd have already had issues a long time ago if concrete was involved. It's strengthens over time and peaks at about 25 years is it? Then starts to devalue (over again about the same length of time it takes to strengthen). Plaster being about 10 years is it?

(Years here are defo wrong but that gives you some info on how it works I think?????? - Need the professionals correct me here)

 

[nozzer]

If I was tiling a wall or a floor over existing tiles, it would have to be a floor. If a failure occurred at least I'm stubbing my toe and not having tiles fall on me in a shower.

As above. I'd remove if you can. Good thing with knowing they're fixed will is you know your substrate is strong so an SDS hammer drill should lift those tiles up quite easily as you can give it some welly.

Though if you are tiling on tile, as above with the slurry etc.

Thanks Dan.

This 'slurry' you mention. . . is it literally dry cement powder mixed with primer (No sand / water) ?

 

[Dan]

I'll let the professionals give you information on that I've never slurry'd anything in my life.

 

[Andy Tiler]

Thanks Dan.

This 'slurry' you mention. . . is it literally dry cement powder mixed with primer (No sand / water) ?

Just mix your flexi adhesive powder with an sbr primer neat,1-1ratio and leave to dry fully before tiling! No sand or water.!



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[Discount Tile Supplies]

Or acrylic primer 50/50 with water and add some adhesive powder to make slurry mix.

 

[DHTiling]

Or acrylic primer 50/50 with water and add some adhesive powder to make slurry mix.

Morning, can you point me towards a brand of acrylic primer that is used for this please.

 

[Bubblecraft]

Hope your existing tiles aren't put down like this

IMO, remove if possible. If your existing tiles are fitted correctly, I'd use a 2 part flexi adhesive & a GT1 mix in with your grout. Sorted!


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