Cracks in the wall

[AnkiVB]

Have skim coated the walls. The problem is that the walls are > and long thin cracks are forming in the filler. Have painted with primer on the wall, can I use latex caulk in the cracks? Have tried filling the cracks but they keep cracking. It's an interior wall made of some sort of extremely porous lightweight concrete.

Help

Want to wallpaper

 

[Snickarnisse]

Hello!

Have you been working with drywall or something else?

 

[AnkiVB]

Some mysterious concrete that crumbles very easily The house is from the 40s. Have removed much of the outer layer that was loose but it still seems like a Mission impossible.

 

[coztello]

I would put on 6mm renovation plasterboard...