What is a potential disadvantage of loose fill insulation?

Loose fill insulation can indeed settle over time, which is a significant disadvantage. When loose fill is initially installed, it occupies the intended space to provide thermal resistance, but as time progresses, gravity can cause the insulation material to compact and settle. This settling can lead to reduced effectiveness in insulating the space as it may create gaps or areas of diminished thermal resistance, ultimately impacting energy efficiency.

In contrast, other types of insulation, such as batts and rigid boards, are less prone to such settling because they maintain their shape and fill potential gaps more effectively upon installation. This characteristic of loose fill insulation is important for homeowners and builders to consider when selecting insulation materials, especially for areas where long-term performance is critical.