Source google image: https://www.seac-gf.fr/igmedias/plancher%20hourdis%20tb/94/plancher-hourdis-isolant-phonique-chape-carelage-seac-tb.jpg
Isolation phonique hourdis
Source google image: https://www.seac-gf.fr/igmedias/plancher%20hourdis%20tb/94/plancher-hourdis-isolant-phonique-chape-carelage-seac-tb.jpg