Can Cellulose Insulation Settle Over Time?

Settling Characteristics

Cellulose insulation, a popular eco-friendly option, is made from recycled paper products and can settle over time due to its lightweight and porous nature. Typically, cellulose insulation settles by around 5-10% within the first year after installation. This settling can be influenced by factors such as humidity, compression, and installation density.

Factors Affecting Settling

Factors like humidity, compression, and installation density can significantly impact the settling of cellulose insulation. For instance, high humidity can cause the insulation to expand and then settle as it dries, resulting in a loss of R-value. To minimize settling, it is essential to install cellulose insulation with the correct density and to ensure a tight seal around edges and joints.

Mitigation Techniques

To mitigate the effects of settling, it is crucial to ensure proper installation and maintenance of cellulose insulation. Regular inspections can help identify areas where the insulation may have settled, allowing for targeted adjustments to be made. Additionally, using a higher-density cellulose insulation can reduce settling over time. Typically, a density of 3.5-4.0 pounds per cubic foot is recommended for optimal performance.