Blown-in Insulation Overview 
For Electric & Natural Gas Customers

Blown-in insulation - often called loose-fill insulation - is made from cellulose, fiberglass or rock wool in the form of loose fibers or fiber pellets. Using a blower, the blow-in insulation is pushed into place, usually by professional installers.

This form of insulation can be used in wall cavities, in irregularly shaped areas and for filling in around obstructions. Blown-in insulation is often used in attics because it insulates the attic floor to keep the heat in the house, reducing heat lost into the attic. Make sure you follow all of the manufacturer's instructions for the insulation as well as keeping these few extra tips in mind when making your decision:

  • Some types of insulation require professional installation, and others you can install yourself. You should consider the several forms of insulation available, their R-values and the thickness needed.
  • The type of insulation you use will be determined by the nature of the spaces you plan to insulate in the house.
  • Properly installed insulation will not only lower your utility bills but keep rooms warmer in the winter and cooler in the summer.
  • For more information on insulation, go to the Department of Energy's website.

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