Bitumen base has come up with tiles in patches

[307camel]

Hi everyone,

I have ripped up some tiles in my kitchen and this has pulled up the bitumen layer underneath in some places. Under the bitumen is a very sandy screed.

Whats best to patch up these areas? Can I just buy bitumen paint and do I have to seal the concrete first?

Also, when I tiled the room next door I got adhesive coming up between the tiles. How is best to avoid this?

Many thanks