Adding new insulation on top of old attic insulation can be an effective way to improve energy efficiency in your home. However, it's important to consider the type of existing insulation and its condition. If the old insulation is wet or moldy, it should be removed before adding new layers. The choice of insulation material, such as fiberglass, cellulose, or spray foam, can also impact performance and cost. Additionally, proper ventilation is crucial to prevent moisture buildup. Ask Improvi.ai for personalized guidance on selecting the right insulation and ensuring a safe, efficient installation.