Acquired 2 units for our entrance bedrooms as we're on a noisy key street. Installed them yesterday and the difference in noise is amazing. I went for the six.4mm laminated glass and positioned the units about the entrance with the window sill to give optimum gap. Undesired noise is often https://stainlesssteeltweezers76318.blogsumer.com/26626343/rumored-buzz-on-energy-efficient-glazing-in-sw3