Energy Source Builder
Cellulose Insulation System
Loose insulation isn't used as much as batts for open wall cavities, because it tends to fall out. A variety of systems address the problem with adhesive binders or support systems. The newest system, called the Dry Pak Wall System, blows cellulose insulation into cavities at 3.0 lbs./cu. ft. density. According to the manufacturer this prevents settling and yields an insulation value of R-3.6 per in.
The secret to the system is a plastic sheet reinforced with non-elastic polyester fibers. Installers attach the plastic to the face of the studs by stapling it every four inches. They cut a small hole through the sheet, insert the hose and fill the cavity with dry cellulose. While the plastic may bulge a bit, it doesn't interfere with drywall installation.
Properly installed, blown-in cellulose fills entire wall cavities leaving no voids that promote heat loss. High density applications, such as Dry Pak also reduce heat loss due to air leaks. Cellulose insulation is made from recycled newspapers.
Contact: parPac
This article appeared in Energy Source Builder #30 December 1993 |
