No, the insulation mustn't touch the drywall. Insulation is designed to control temperature; if it touches the drywall, it can take up dampness with the air, which may result in mould and mildew development. Expanded polystyrene insulation setting up products and solutions, together with structural building panels, big structural blocks, https://keybookmarks.com/story18776770/the-insulation-installation-diaries