No, the insulation mustn't touch the drywall. Insulation is intended to regulate temperature; if it touches the drywall, it will eventually take up humidity in the air, which can result in mildew and mildew expansion. Expanded polystyrene insulation developing goods, including structural building panels, large structural blocks, wraps & sheathings https://brooks5yiqx.blogscribble.com/32328245/how-insulation-installation-can-save-you-time-stress-and-money