A mere 2% in voids and gaps associated with normal fiber glass batt insulation can result in an actual decrease in thermal performance of 14 – 42% less than the batts labeled R-Value.According to a study at the University of Colorado on cellulose insulation‘s superiority to fiberglass, Cellulose Insulation achieves a lighter building cavity and is 26 – 36% more efficient than fiberglass! Two structures were built identical in every respect but the insulation material. Blower door tests demonstrated that the structure filled with cellulose insulation was 36 – 38% lighter than the fiberglass and the structure filled withcellulose insulation went on to use 26.6% less energy for heating.
With Cellulose’s high density and custom fit around obstacles, Cellulose Insulation is able to deliver and maintain it’s effective R-Value against other forms of heat transfer through the buildings envelope (convection and radiation) while, in comparison, other insulations perform poorly.
Cellulose Insulation is a field proven noise control insulation, absorbing substantial levels of unwanted sound.
Because sound is often airborne, it will follow the same paths as air infiltration. The sprayed-in-place Cellulose Insulation creates a monolithic barrier, sealing off voids and gaps that could easily transmit sound. Because of its high-density and seamless coverage, Cellulose Insulation contributes to an excellent STC rating.
The fibers of cellulose insulation are much finer than mineral fiber blowing wool. When cellulose is pneumatically installed it takes on almost liquid-like properties that let it flow into cavities and around obstructions to completely fill walls and seal every crack and seam. No fiber glass or rock wool material duplicates this action. Liquid-applied foam plastics do, but they cost much more than cellulose.
In new construction cellulose insulation can be installed in walls using a spray process or several different dense-pack dry techniques that are also effective at sealing homes against air infiltration.
Walls Insulated with Cellulose Insulation are extremely fire Resistant. The International Fire Safety Code permits electrical boxes installed on opposite sides of an Cellulose-filled wall to be separated by as little as 3.5 inches, while for fiberglass-insulated walls, the required separation is 24 inches.Because the dry-wet process used to make Cellulose Insulation is more advanced than most other cellulose manufacturers, the fir retardants are locked in so well that it would take over 300 years in uninhabitable conditions for Cellulose Insulation to lose it’s retardant ability.
Cellulose Insulation has been approved under some local building codes as a fire blocking product.
Cellulose insulation actually helps make homes safer by providing up to 50% better fire resistance than fiberglass. In practical terms, this means that occupants have more time to reach safety in case of fire. Unlike fiberglass, it greatly restricts the amount of oxygen available to support combustion – it won’t pump oxygen to the fire.
-Insulator’s Guide, news account of fire demonstration.