Source google image: https://img.yumpu.com/41745775/1/358×507/attaacnuer-le-bruit-dimpact-avec-la-plaque-fermacell-powerpanel-se.jpg?quality=85
Plaque isolation 6 cm
Source google image: https://img.yumpu.com/41745775/1/358×507/attaacnuer-le-bruit-dimpact-avec-la-plaque-fermacell-powerpanel-se.jpg?quality=85