What Is the Purpose of Insulation?

Insulation is installed in homes or businesses to reduce noise and help maintain desired temperatures inside. Insulation reduces the heat transfer between the inside of a building and the outside.

In the winter, when the inside of a home is warmer than the outside, the heat inside the home is transferred to the colder outside air, making the inside colder. The more insulation installed in a building, the less heat that is lost to the outside. Reducing the amount of heat lost in the winter reduces the energy required to heat a house, makes the house more comfortable and results in lower heating bills. Similarly, a house stays cooler and requires less energy to cool in the warmer months if it’s well insulated.

Insulation’s thermal resistance is measured by an industry standard called “R-value.” As the R-value goes up, so too does the ability of the insulation to slow down the rate of heat transfer between a building and the outside air. This value takes into account all aspects of the insulation including: thickness, materials and weight. The U.S. Department of Energy estimates that homeowners can reduce their energy bills from 10 to 50 percent with a major portion being possible through proper insulation. In addition to thermal benefits, insulation can help reduce sound transmission through walls, floor and ceilings.