Secondary glazing involves putting in yet another windowpane on an existing window to boost insulation. We're not concerned about effect noise. Roxul Protected N Seem appears to be the solution for airborne noise. If we attach the drywall towards the joists devoid of resilient channels soon after setting up Roxul, https://chesterf692ghh6.bloggazzo.com/33678313/the-single-best-strategy-to-use-for-energy-efficiency