Air pockets....That is what makes insulation do its thing.  The more separate air pockets you have the slower heat can move through.   That is why multi-pane glass works in today's windows, by creating an air pocket in which the heat must move through.  Cellulose insulation has the most air pockets of any of today's materials. More than foam, more than fiberglass and more than any of the poured in materials.  With an r-value of 3.75 per inch, Cellulose will give you the highest applied r-value for your money.   Whether its 3 1/2 inches in your walls, or 12 inches in your attic, you simply can not get better results with any other material.  Rolled insulation in your attic allows the heat to escape between the insulation and your joists, where as Blown Cellulose creates a "Blanket", sealing your rolled insulation and making it even more efficient.  Most of today's home were built with sub standard insulation requirements  and many were built with no insulation what so ever, especially in the wall cavities.  Today's standards call for 3 and 1/2 inches in the walls and 10 to 12 inches in the attic areas.  The more energy rates rise, the more you can save by bringing your home up to the current standards.  The same applies to your cooling, Heat from scorching hot summertime attics, comes through your ceiling, making your air conditioner work much harder than it needs to.  Insulation not only saves on both your heating and cooling bills, but adds years of life to your furnace and air conditioner.  Call us today for a free in home evaluation  and find out how you can save on all of your heating and cooling costs.