Soft black adhesive removal - Tile Advice

[geraldine]

Hello all!! Great to be back here after a long while away!! My situation is: I have lifted some old lino tiles (asbestos free, got them tested!) and am now faced with a kitchen floor covered in this soft black adhesive (goes quite malleable when heated with a heat gun but very sticky) and I understand I cannot tile directly on top of it. I am not looking to cut corners but would just like to know HOW to deal with the problem. I can scrape it off but how do I clean the concrete substrate for the tile adhesive? The client wants to keep the price down so screed better avoided... Any comments from someone who has had a similar problem would be very welcome!!!

 

[GAZ5518]

Its probably “Bitumen” which was commonly used to stick not only Lino tiles but Parquet flooring as well.
If the screed is in good condition below … I would prime/seal the floor or overlay with a 6mm backer board and go ahead with the Tiling.
Or … put down an anti crack Matt ….
You could always stick a tile down as a tester and see how well it sticks… (it will stick)!!
GW.