Hej,
Jag skriver på engelska men ni svarar på svenska, det är ok.
I have bought my first house and started renovating it. I started to remove wallpaper to pain the walls.
But seems I remove one layer more! There were two layer wallpaper and another layer of cardboard( that I do not what is that)
Then what can I do? What is this cardboard? House is old from 1965.
Any clue appropriate a lot.
regards,