Acquired two units for our entrance bedrooms as we are on a noisy most important highway. Installed them yesterday and the difference in noise is astounding. I went for the 6.4mm laminated glass and positioned the units about the entrance of your window sill to give most hole. Lower heating https://johnnymaahl.affiliatblogger.com/78972778/top-guidelines-of-bespoke-secondary-glazing-in-chelsea