Cleansing your secondary glazing windows is not hard. Simply open up the secondary window and cleanse each the interior and outer panes of glass as you'd probably with almost every other window. Glass is actually a rigid, inelastic material, which means that it is a foul conductor of audio. https://acousticsecondaryglazing88752.blogolenta.com/31696928/facts-about-secondary-glazing-for-soundproofing-revealed