A blowable insulation material includes batt shredded into blowable clusters. In the several embodiments, the clusters include water-repellant or lubricant-finished fiber and/or dry fiber and/or binder fiber, and may be a mixture of clusters and a natural material including down, silk, wool, cotton or...http://www.google.fr/patents/US6329052?utm_source=gb-gplus-shareBrevet US6329052 - Blowable insulation
