Air Hole: The broader the gap amongst the first window as well as secondary glazing (ideally a hundred–150mm or maybe more), the higher the sound reduction. Keep the sheet up for the window in order that it overlaps the window frame evenly on all sides. Two pairs of palms are https://emilianorhtei.bcbloggers.com/35667856/the-smart-trick-of-secondary-glazing-london-that-nobody-is-discussing