Hello all, I have an internal wall made of ply/hardboard that is covered in woodchip wallpaper. I need a way to cover the woodchip, creating a flat surface for the new wallpaper. Current thinking is to glue some hardboard on top of the woodchip, then wallpaper that. I would screw it on but the battens are few and far between and I don't know how reliable they will be. I was thinking of using CT-1 to glue the boards on but its rather expensive (the adhesive would need to be flexible). Total area approx 2.4m x 2.4m. Have I got it all wrong and are there any better suggestions out there? Many thanks in advance.