Variety X 5/8-inch drywall is out there at lumberyards and home facilities. Kind X drywall is designed for hearth-resistance, but as it’s denser than typical drywall, it also stops sound improved, especially when applied with resilient channel. Lots of kits come in multipacks that could cover up to ten windows. https://high-precision-slant-twee46678.bloggadores.com/33897246/detailed-notes-on-window-retrofit