1. Windows
  2. Doors
  3. Attics
  4. Ventilation
  5. Other Items
Windows are usually the weakest part of a residence in terms of exterior-to-interior noise reduction. To achieve optimum noise reduction, a fairly large air gap (about two inches) is placed between two windows of unequal thickness. This can be done by adding a secondary window to the existing one or by replacing the existing one with a double window assembly.