In a word YES!!!

Insulation is the most effective way to improve the energy efficiency of a home. Insulation of the building envelope helps keep heat in during the winter, and releases heat out during summer to improve comfort and save energy.

Insulating a home can save 45–55% of heating and cooling energy.

The term ‘insulation’ refers to materials which provide substantial resistance to heat flow. When these materials are installed in the ceiling, walls, and floors of a building, heat flow into and out of the building is reduced, and the need for heating and cooling is minimized.

Insulation should always be coupled with … more