We will soon start working on our upstairs area with sloped ceilings. The walls have a very heavy textured wallpaper, which in some places was very loose, so we've torn it down there. My question is whether the difference in levels between where there is wallpaper and where the old plasterboard is visible behind it will show with 6 mm renovation plasterboard? Anything to consider when installing plasterboard on sloped walls?
Martin