Source google image: http://www.rouchenergies.fr/images/isolation/3-usages-fibre-de-bois/sylvactis-isobag-plancher-combles-15.jpg
Isolation combles granules
Source google image: http://www.rouchenergies.fr/images/isolation/3-usages-fibre-de-bois/sylvactis-isobag-plancher-combles-15.jpg