Purchased 2 units for our entrance bedrooms as we're on a noisy major road. Mounted them yesterday and the difference in noise is awesome. I went for your six.4mm laminated glass and positioned the units to the front with the window sill to provide highest gap. Lower heating costs signifies https://beautyproducts56665.csublogs.com/32763733/fascination-about-retrofit-double-glazing-in-london-sw3