Is drywall possible on insulated textured wallpaper?

Hello everyone,

we have purchased a house built in 1962 with an extension from 1992. In the extension, the exterior walls are lined on the inside with an insulated wallpaper. It seems to be a ready-made product: woodchip wallpaper with a 1 cm soft, white insulation layer. We want a smooth interior wall. Removing the insulated wallpaper is tedious and leaves adhesive residues (applied at the time with a fine notched trowel). Do we risk mold if we simply screw or glue drywall panels onto the wallpaper?

Thanks for tips!
Best regards

You will curse, cry, and groan, but do yourselves a favor and do it properly right away. Such a "layered construction" will always come back to haunt you. Unless you give away a bit more space and install a proper, complete drywall in front of it (to then immediately use it as an installation level for newly installed electrical stuff). I have experience with botched jobs in old houses and curse every euro saved and every minute saved back then (years later).

We want a smooth interior wall.

Even smoother than wallpaper? - Do you want paint or tiles?

There is just textured wallpaper on it, and we would like it smooth, meaning plastered and painted. I think you are right, and I will tear it out.

Thank you for the answers! Great forum here :)