Hello, I live in a 7 year old house built by Morris homes. I'm planning in tiling the hall way and have ripped up the carpet and underlay to discover a black floor. I was going to tile straight onto this but a friend has told me that he did the same in his house and the tile adhesive never dried as the black floor is some form of damp proof membrane.
I've had a look at my floor and around the edges of tha hall some of the flooring is cracked and I can prise up a small piece of this black surface. The black layer is about half an inch think and is very hard
- almost like cinder block but without all the bubbles in it. Under the black layer I can see a concrete floor.
What is the best way to tile my hall? Should I put down marine ply and tile onto that? If so, how do I fix the marine ply to the floor? Thanks Pete