Bruce coughed up some electrons that declared:

Tim S wrote:
Just peeled some more old flooring up in the bungalow. It had been stuck
down with what looks like industrial evo-stick. The flooring cleaved off
with a spade, but there remains a layer a mm or two thick of the rubbery
adhesive.

snip

Has anyone any bad experiences of tiling straight over this sort of stuff?


Yes, I went over it with a levelling screed, which gave me a smooth and
level surface to tile on to.

Ah yes - that stuff sticks to everything. It's an option.

Cheers

Tim