Black asphalt help - Tile Advice

[Prezzo]

Hi all,

thanks I’m advance for any help



I've pulled up the floor on the bottom floor of a house. It has a black asphalt layer. I’m looking to lay underfloor heating so I’m going to use tile adhesive to stick down insulation boards, then the heating system and finally tile on top. My question is:



do I need to do anything to the asphalt before I stick the insulation boards down apart from priming it?

 

[Dave]

Looks line a bitumen adhesive, remove as much as you can. 👍