Improving existing façade insulation against railway noise
International audience ; The Environment Round Table of the French government ("Grenelle de l'environnement") has focused efforts on the development of alternatives to road transport. A conclusion from these studies has been that railway usage is expected to increase in the future. Departmental noise transport committees were set up in 2001 in order to take an inventory of noise sensitive receivers and to look at technical solutions which could be implemented. A project had been undertaken which studied the insulation offered by existing dwelling facades at 800 properties subject to railway noise. In order to quantify the sound insulation performance, measurements of facade insulation have been carried out and compared to the day and night-time performance targets detailed by the policy document "Circulaire 25 Mai 2004". Where necessary, the sound insulation and the ventilation performance of the facades have been improved to meet the requirement of the aforementioned regulations.
