The time it takes to install attic insulation depends on several factors, including the size of your attic, the type of insulation being installed, and any necessary prep work that needs to be done before installation. In general, the installation process can take anywhere from a few hours to a full day. However, it’s important to note that the process may take longer if there are any issues with your existing insulation or if there is a significant amount of prep work that needs to be done before installation. Your insulation contractor will be able to provide you with a more accurate timeline for your specific installation.