Source google image: https://www.maisonbrico.com/images/conseils/isolation-par-ouate-de-cellulose-en-panneaux-semi-rigides-4737-7398-l480-h480-c.jpeg
Panneau ouate de cellulose
Source google image: https://www.maisonbrico.com/images/conseils/isolation-par-ouate-de-cellulose-en-panneaux-semi-rigides-4737-7398-l480-h480-c.jpeg