Which type of insulation material typically has a higher R-value in loose fill applications?

In loose fill applications, high-density fiberglass insulation typically has a higher R-value compared to other materials. The R-value measures the insulation's resistance to heat flow, which is crucial for energy efficiency in buildings. High-density fiberglass is engineered to provide superior thermal performance, which is beneficial in both residential and commercial applications.

This type of insulation achieves its high R-value due to its dense packing and effective air-trapping ability. The density of the material allows it to minimize air movement, thereby enhancing its insulating properties. As a result, high-density fiberglass not only provides effective thermal resistance but also tends to be more effective at reducing noise transmission compared to lower-density alternatives.

In contrast, cellulose, mineral wool, and low-density fiberglass generally have lower R-values in loose fill applications. Cellulose, while environmentally friendly, can settle over time, reducing its effectiveness. Mineral wool, while effective in certain applications, doesn’t provide the same level of thermal performance as high-density fiberglass in loose fill. Low-density fiberglass is lighter and easier to install but does not offer the same thermal efficiency as its high-density counterpart. Thus, when looking for optimal performance in loose fill insulation, high-density fiberglass is typically the best choice.