Many older houses are improperly insulated, if there is any insulation at all. This can have a large impact on your heating and cooling bills. Loose-fill insulation can be blown into your walls and attic to help increase the efficiency of your house, significantly decreasing your heating and cooling expenses.
Cellulose insulation is relatively inexpensive and easy to install.
Most of the places that sell loose-fill insulation will lend you a blower for the weekend if you buy a minimum quantity of insulation. You may also need to recruit a few helpers for this project. You will need 1 person to blow the insulation into the walls and at least 1 other person to operate the machine - turning it off and on and filling it with insulation. The most difficult part of this project is figuring out where to drill access holes into your walls. First you need to determine what will be the easiest surface to repair once the insulation is blown in.