Whether you’re living near a busy road and have difficulty blocking out the sound of traffic or just would like a more peaceful environment in your home there is an answer for noise control. Windows are generally poor barriers against noise entering your home, a standard window glazed with 4mm glass does very little to insulate against noise, even the performance of wall insulation within wall can be substantially reduced by poor window design. The Weighted Sound Reduction Index (Rw) is a number used to rate the effectiveness of a soundproofing system on windows. The Rw values represent aggregated data showing the average performance of a window across a broad spectrum of sounds. Increasing the Rw by one translates to a reduction of approximately 1db in noise level. Therefore, the higher the Rw number, the better a sound insulation the window will deliver. However no matter how good the window is at keeping noise out, if it is not installed and sealed properly during construction, noise will still penetrate the home all air gaps must be sealed off to ensure that a window will achieve the best noise reduction it can.