Browse Forums Windows & Doors And for those with a bit of cash that are chasing a 44db reduction, have a look here: http://www.doubleglazed.com/windows.html Last paragraph 7 3674 5 2136 We have 2 of these in our office... they work fine. http://www.lotusdoors.com.au/acoustic/index.html 4 512 6 1031 | |||