Cellulose Blown-In Insulation
What Is Loose-Fill Cellulose Insulation?
To mitigate the risks of fire, water, and mold, cellulose insulation is primarily crafted from post-consumer recycled materials. It offers fire resistance comparable to blown-in insulation. However, if existing issues aren’t addressed prior to installation, it may be susceptible to water damage.
Various factors influence the mechanical degradation rate of cellulose insulation, including temperature, oxygen presence, and moisture levels. Even minimal moisture levels can significantly affect its mechanical durability. Generally, a doubling of water content leads to a 50% decrease in insulation’s mechanical lifespan. Moisture accelerates oxidation-induced degradation, particularly below 120 degrees Celsius. Beyond this temperature, dry insulation degrades at a different pace, influenced by its prior performance. Intermittent exposure to high temperatures exacerbates these effects. According to the “eight-degree-centigrade rule,” mechanical deterioration doubles for every eight degrees centigrade increase from a base temperature of 120 degrees centigrade or higher.
To ensure proper heat retention and maximize utility bill savings, cellulose insulation should be topped off at a height of 16″-17″.
What Are the Pros and Cons of Cellulose Insulation?
Pros:
- Spray foam insulation can seamlessly integrate with this versatile material.
- It features a fire-retardant treatment.
- Cost-effective fiberglass insulation with a comparable R-value.
- Its high recycled content renders it environmentally beneficial and allows for dense packing in pre-existing wall cavities.
Cons:
- Vulnerable to water damage if pre-existing issues are not addressed.
- Post-installation settling may occur, potentially reducing effectiveness (professionally installed cellulose insulation accounts for settling during installation).
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