Which type of insulation is often harder to dry due to density at the bottom?

Loose-fill insulation is often harder to dry due to its inherent characteristics. This type of insulation is typically made of materials like cellulose or fiberglass, and when it becomes waterlogged, the dense accumulation of those materials at the bottom can retain moisture. The density at the bottom makes it difficult for airflow to circulate through it effectively, which is necessary for it to dry out.

Additionally, loose-fill insulation may settle over time under its own weight, creating more compacted areas that trap water, further complicating the drying process. This property results in sections that may not dry thoroughly even if airflow and dehumidification efforts are applied in the surrounding areas, making it more challenging to manage during a drying project.

In contrast, other types of insulation, such as fiberglass, foam board, and rigid insulation, often have properties that allow for more effective drying or are less affected by moisture retention.