Insulation is fundamental to energy efficiency, creating a thermal barrier that limits the flow of heat between the inside and outside of a home. Beyond basic fiberglass batts, today’s homeowners can choose from materials such as spray foam, rigid foam boards, or blown-in cellulose, each offering unique benefits for different applications. Proper installation is crucial—gaps or compressed insulation can dramatically reduce effectiveness. Key areas include wall cavities, attics, floors above unconditioned spaces, and around ducts or pipes. Investing in advanced insulation techniques ensures comfortable indoor temperatures year-round with less reliance on heating and cooling systems.