Fiberglass Insulation

Composition:

  • Made from fine strands of glass fibers.

  • Available in batts, rolls, and loose-fill forms.

Pros:

  • Good moisture resistance, making it less susceptible to mold and mildew.

  • Maintains insulating properties even when exposed to moisture.

  • Non-combustible, adding a layer of fire safety.

Cons:

  • Can cause skin and respiratory irritation during installation.

  • Less effective at filling small gaps and irregular spaces compared to loose-fill cellulose.

Cellulose Insulation

Composition:

  • Made from recycled paper products treated with fire retardants.

  • Available primarily in loose-fill form.

Pros:

  • Better at filling irregular spaces and gaps, reducing air leakage.

  • Made from recycled materials, making it eco-friendly.

  • Good soundproofing properties.

Cons:

  • Absorbs moisture, which can reduce its insulating effectiveness and lead to mold and mildew growth.

  • Can settle over time, potentially reducing its R-value and effectiveness.

  • Combustible, though treated with fire retardants.

Why Fiberglass insulation is preferred in humid climate

Climate Considerations:

  • High Humidity: Florida's climate is characterized by high humidity levels and frequent rainfall. Insulation materials need to resist moisture to prevent issues like mold, mildew, and reduced thermal performance.

Moisture Resistance:

  • Fiberglass: Does not absorb water, maintaining its insulating properties even in humid conditions. This resistance to moisture makes it less prone to mold and mildew growth, crucial in a damp climate like Florida’s.

  • Cellulose: Tends to absorb moisture, which can compromise its insulating effectiveness and promote mold and mildew growth. This is a significant drawback in Florida's humid environment.

Durability:

  • Fiberglass: Due to its moisture resistance, fiberglass insulation tends to have a longer lifespan in humid climates, reducing the need for frequent replacements or maintenance.

  • Cellulose: The tendency to settle and absorb moisture can lead to a decrease in insulation efficiency over time, requiring more maintenance and potential replacement.

Fire Safety:

  • Fiberglass: Being non-combustible, fiberglass adds an extra layer of fire safety, which is an important consideration in any home.

  • Cellulose: Although treated with fire retardants, cellulose is still combustible, which could be a safety concern.