tiles stuck on top

[Handyeire]

Ive to rip up floor in small kitchen/utility and large dining area and while doing this I've noticed there's vinyl (rubbery)tiles underneath laid with evostick. The ceramic tiles I'm removing have bonded decent to these underneath and I'm wanting to know, is it OK to tile on top of them again or should I remove. The reason why I'm asking is that their well down and when removing some of them, I'm taking lumps out of screed. I've never came across this before and want to know is it OK to tile on them or did tiler before me just take a chance and got lucky after he did it seeing as they've been down 15 years.

 

[Rich Midge]

If they're that well bonded you could give them a good clean then apply slurry coat before tiling. Personally I rather take them up then slc the lot.

 

[Handyeire]

If they're that well bonded you could give them a good clean then apply slurry coat before tiling. Personally I rather take them up then slc the lot.

Was told in tile store that I'll be OK just to lay on top. What I've done is removed all old adhesive which has left a rough surface in 70% of the area and I also got the grinder out and scratched the area well. Have to start the tiling tomorrow but wondering will I need to prime the area as well?

 

[Rich Midge]

Sorry mate I'm slightly confused here! Have you taken up the ceramics but left the vinyl tiles or have you stripped the whole lot up leaving the vinyl adhesive down?

 

[Handyeire]

Sorry mate I'm slightly confused here! Have you taken up the ceramics but left the vinyl tiles or have you stripped the whole lot up leaving the vinyl adhesive down?

Sorry, left the vinyl tiles down and scratched them with grinder thou haven't scratched right through. They are well down.

 

[Handyeire]

If they're that well bonded you could give them a good clean then apply slurry coat before tiling. Personally I rather take them up then slc the lot.

Sorry if this sounds silly so go easy on me but what's a slurry coat.

 

[Rich Midge]

If there's adhesive residue I'd prime. If you're down to just vinyl I'd slurry. I know some adhesives state you can tile straight onto vinyl tiles, I guess it's a personal thing but I always slurry. You could have a look at Ultra's Prime it N. It's a primer for impervious substrates, maybe that could be the way to go.

 

[Rich Midge]

Each manufacturers slurry is slightly different but generally its primer mixed with about 30% addy and I apply by brush. Some say use the primer neat, others say dilute it.

 

[Handyeire]

Each manufacturers slurry is slightly different but generally its primer mixed with about 30% addy and I apply by brush. Some say use the primer neat, others say dilute it.

So I can use diluted evo stick 918 mixed with addy and roll all over the floor then wait an hour or 2 then tile?

 

[Rich Midge]

Not a primer I'm familiar with. As long as it's a good quality sbr then yeah roll away. I'd wait until its completely dry. Should dry gritty, like a really heavy, course sandpaper hence the extra adhesion.

 

[NWTiles]

Ensure that the Vinyl is clean and grease free, then use a BAL Single Part Fastflex Adhesive which is an S2 classifciation adhesive which will out perform BSEN12004.

Spec Taken From BAL

"Most substrates including: Asphalt (suitable grade e.g. flooring), Concrete, cement:sand screeds and rendering. Existing vinyl tiles, unglazed ceramic tiles, quarry tiles, terrazzo and natural stone. Fibre reinforced cement boards and lightweight tile backer boards. Tongued and grooved floorboards, Underfloor heating."