So precisely what is secondary glazing which is it worthwhile? Let’s begin with the fundamentals. Secondary glazing includes fitting an additional pane of glass or plastic to the inside of an present window, making a thermal barrier in the center. You simply connect the polycarbonate panels in your present windows https://buildingregulations04790.blazingblog.com/34758066/the-fact-about-secondary-glazing-that-no-one-is-suggesting