GBI and Insulation

In the area of insulation we made another GBI-oriented choice. Just as we sealed the crawlspace, we chose to seal the attic via spray-in foam insulation. This seals the area as well as providing extremely high R-value insulation. For the walls we chose packed cellulose insulation. This brought the cost down versus doing spray-foam everywhere, but also has very high R-value insulation. In addition, it uses recycled materials (often newspapers) that are treated to repel insects and provide fire retardation. A mesh is hung from the walls and the treated cellulose shred is packed in behind the mesh. This type of insulation also has a very high sound-dampening affect, making the house nice and quiet inside. In order to seal the rest of the house, all gaps were sealed on the walls before the cellulose insulation was installed.