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Insulation Materials
Cellulose
Fiberglass
Fiberglass
Composition
- Cellulose Made from recycled paper (mostly newspaper) treated with fire retardants like boric acid.
Thermal Performance (R-Value)
- Has an R-value of about R-3.2 to R-3.8 per inch.
Air Sealing.
- Denser and better at reducing air leaks.
Moisture Resistance
- Absorbs moisture, making it more mold-resistant.
Environmental Impact
- Made from 85%+ recycled material, making it the more eco-friendly choice.
Fiberglass
Fiberglass
Fiberglass
Composition
- Fiberglass Made from tiny glass fibers, often spun into batts or blown-in loose-fill form.
Thermal Performance (R-Value)
- About R-2.2 per inch (batts) or R-2.9 per inch (blown-in).
Air Sealing.
- Allows more air movement unless properly sealed.
Moisture Resistance
- Does not absorb water, which can lead to mold if not properly dried.
Environmental Impact
- Contains some recycled glass but is mostly made from new materials.
Which insulation material is Better for you now?
For your attic insulation, cellulose might be a better option because of its superior R-value, air-sealing properties — especially if you are taking advantage of rebate programs!
Let me know if you need a recommendation based on specific home conditions!
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