Question On Black Floor Adhesive

[Carts69]

Hi, I have just removed cork tiles from my concrete kitchen floor, I'm now left with a black tar like adhesive, even though this is applied thinly, it's a total nightmare to remove, I aim to tile this area with ceramic tiles, now I've heard that a slurry application is the way forward, my question is...can I slurry straight over this black adhesive or do I need to scrape away & get most of it off?

 

[Dave]

Slurry over if stuck like poo

 

[StevieBoy]

Prime with SBR, then tile.

 

[Old Mod]

As @Dave above!

 

[Carts69]

Excellent, slurry it is then! Cheers

 

[Carts69]

Another question guys... What trowel & what thickness of adhesive for 450 X 450 tiles please?

 

[AliGage]

Another question guys... What trowel & what thickness of adhesive for 450 X 450 tiles please?

Whats the floor like for flatness?

Back butter the tiles and a 10mm square notch would probably be my choice. It usually is, lol

 

[Carts69]

The floor is pretty flat, although one end of the kitchen has a crack running across the floor, around 500 long, the other side of the crack is around 300 wide, this area has lifted a little, I have a rock on the spirit level.
The area is still solid, I'm just wondering if this could be my starting point, making up differences in slight levels with the adhesive?

 

[AliGage]

300 wide? You sure?

 

[Carts69]

The crack stretches 800 long X 300

 

[AliGage]

I cant see it

 

[Carts69]

The crack is going through the centre of the pic, not so concerned about that, it the higher area beyond the crack, there is a slight lip from the crack backwards, as if the floor beyond the crack a slightly risen

 

[Carts69]

Here is a better pic showing the difference in height, level on bubble but clear gap under the level, is this worth worrying about?

 

[Carts69]

Would also like to tile straight through to this other room, problem is the floor in the next room is 5mm higher as per picture, what would be my options here, can I build the adhesive up to make up the difference in heights, ie..start tiling from this point or put in a transition strip?

 

[Old Mod]

 

[Carts69]

its a concrete base with sticky back tiles from £ shop lol

 

[Old Mod]

Well on what I can see from your pics,
Remove those plastic tiles, clean floor of all loose materials and any 'black' that's not adhered well.
Using a 'Slurry' coat as @Dave, suggested, or use a pre-mixed one.
Tilemaster do a product called Prime+Grip
Mapei do an equivalent, Eco Prime + Grip.
Personally I now use Tilemasters.
Prime whole area, then using levelling compound, bring whole floor to high level by the front door.
All one level, flat and ready to tile.
That's just my opinion, but that's the way I'd go, as long there are no height issues anywhere.

 

[Carts69]

Cheers, not really confident on using flc, would a threshold strip look wrong in this area, has it been used for tile to tile transitions?

 

[Old Mod]

U can use them wherever u wish, that's your choice.
There are ways of using SLC to simplify getting it all flat.
U can put markers in the floor every so often or make bays.
U need to make a decision on which way forward u'd like to go, then u can be directed accordingly.

 

[Italy]

Well on what I can see from your pics,
Remove those plastic tiles, clean floor of all loose materials and any 'black' that's not adhered well.
Using a 'Slurry' coat as @Dave, suggested, or use a pre-mixed one.
Tilemaster do a product called Prime+Grip
Mapei do an equivalent, Eco Prime + Grip.
Personally I now use Tilemasters.
Prime whole area, then using levelling compound, bring whole floor to high level by the front door.
All one level, flat and ready to tile.
That's just my opinion, but that's the way I'd go, as long there are no height issues anywhere.

because mapei ecoprime+grip?
mapei is ecoprimegrip, grip already in the bucket

 

[Italy]

Here is a better pic showing the difference in height, level on bubble but clear gap under the level, is this worth worrying about?

View attachment 78275

in italy is the norm.........

 

[StevieBoy]

Excellent, slurry it is then! Cheers

As you wish

 

[Carts69]

In bays sounds a bit more in my league, how would this be best undertaken, say a square metre at a time, would I stick batterns with instant grab to the floor & simply pour it in, is that the general idea?

 

[Old Mod]

There's a thread here somewhere, I'll try find it.
Think @whitebeam or @Phil Hobson knows.
See what I can find.

 

[StevieBoy]

In bays sounds a bit more in my league, how would this be best undertaken, say a square metre at a time, would I stick batterns with instant grab to the floor & simply pour it in, is that the general idea?

What a load of mucking about - just prime it with SBR and tile it as I said before.

 

[Old Mod]

Have a read of this @Carts69 see if this makes task less daunting.

Slc Method, My Way - How To Use Self Levelling Compound Properly

 

[StevieBoy]

Lol ok I give in.

 

[Carts69]

I appreciate all answers but Stevieboy... Can you back up your theory to be successful 12 months down the line, have you dealt with this exact issue on a regular basis & can vouch for 100 per cent success, if so... I would take this approach hands down?

 

[StevieBoy]

I appreciate all answers but Stevieboy... Can you back up your theory to be successful 12 months down the line, have you dealt with this exact issue on a regular basis & can vouch for 100 per cent success, if so... I would take this approach hands down?

Nothing is ever 100%, all I can say is I've laid dozens and dozens and never had a failure.

I wouldn't suggest it otherwise, as I genuinely wouldn't want anyone to encounter problems.

If it's prepped correctly as I have suggested you will be fine.

 

[Carts69]

Ok... I suppose as the floor is pretty level the slc method is not essential, I have today started to give the floor a slurry coat of SBR & rapid set adhesive, I suppose it best to complete the rest of the floor & tile onto that!