Q
is it ok to put cellulose insulation over fiberglass
I'm a seasoned industrial engineer with a keen interest in machine learning. Here to share insights on latest industry trends.
Combining cellulose and fiberglass insulation can be effective, as it takes advantage of the strengths of both materials. Cellulose, made from recycled paper treated with fire retardants, provides excellent thermal and acoustic insulation. It's dense, reducing airflow and the movement of heat. Fiberglass, made from fine glass fibers, is lighter and less expensive but can settle over time, potentially reducing its effectiveness. When cellulose is placed over existing fiberglass insulation, it can help fill in gaps and improve the overall insulation barrier. However, it's crucial to ensure the existing fiberglass is dry and in good condition to prevent issues like mold growth. Furthermore, the additional weight of cellulose can compress the fiberglass underneath, slightly reducing its insulative properties, though the overall R-value (a measure of thermal resistance) of the insulation layer should still increase. Consulting with a professional is advisable to assess the specific conditions in your building and ensure the combination of materials won't lead to moisture problems or other issues.
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