I specialize in blowing and batt insulation. Insulation is the most single important element for energy efficiency, and a key element in reducing energy bills. There are several reasons why it is important to install the correct insulation. Un-insulated walls and roofs are letting as much as 60% of a home’s heat escape, which equates to a lot of wasted energy and increased emissions. Savings as much as $150 and up per year can be made on heating cost.