Weatherization is the process of making a building more energy-efficient by improving its ability to maintain a comfortable indoor temperature. This often involves sealing gaps and cracks, adding insulation, and upgrading windows and doors to prevent drafts. By reducing energy loss, weatherization helps lower heating and cooling costs. In addition to saving money, weatherization contributes to environmental sustainability. By using less energy, buildings can reduce their carbon footprint and reliance on fossil fuels. Programs often provide assistance to homeowners and renters, making it easier for them to access energy-efficient upgrades and improve their living conditions.