Hello, everyone,
I discovered this under a carpet (the carpet has a layer of soft foam/rubber itself). It looks like cork, but appears to be hard. It's around 5mm thick. The house was built in early 60s. That's all the clues I have.
What kind of flooring/underlay is it? Can I remove the old carpet and lay vinyl flooring or floating floor boards on top of it?
Thanks a lot.
Probably Masonite.
Floating floor, definitely yes. Vinyl will depend on how flat everything is. Ie. Any change in floor height within the room, typically interface between concrete and wood.