Source google image: https://www.maisonbrico.com/images/conseils/isolation-renforcee-sous-charpente-par-double-couche-d-isolant-587-3940-l480-h480-c.jpeg
Isolation comble en double couche
Source google image: https://www.maisonbrico.com/images/conseils/isolation-renforcee-sous-charpente-par-double-couche-d-isolant-587-3940-l480-h480-c.jpeg