Superior thermal performance:Cellulose has a higher R-value (a measure of thermal resistance) per inch than fiberglass, meaning it provides better insulation in a thinner layer. When blown into a cavity, its dense composition fills gaps and crevices, preventing air leaks and drafts more effectively than traditional batts.
Effective soundproofing: The density of cellulose also makes it an excellent material for absorbing sound, reducing noise transfer from outside or between rooms.
Eco-friendly and sustainable: Composed of up to 85% recycled paper, cardboard, and wood products, cellulose insulation repurposes waste that would otherwise go to a landfill. The manufacturing process also requires less energy than other insulation types.
Fire resistance: Cellulose is treated with chemicals like boric acid and borax to make it fire-retardant. It has a Class 1 Fire Rating, meaning it can slow the spread of flames in a fire.
Pest and mold deterrence: The chemical treatment in cellulose is disliked by pests and can also resist mold and mildew growth.
Cost-effective: As a product made from recycled materials, cellulose is an affordable insulation option with the added benefit of providing long-term energy savings.
Cons:
Prone to settling: Over time, the material can settle and compress, reducing its installed thickness. This can leave gaps at the top of wall cavities, decreasing its overall R-value and allowing air to escape.
Moisture sensitivity: As a paper-based product, cellulose readily absorbs moisture. If it gets wet from a leak or excessive humidity, it loses its insulating power and can create an environment for mold and mildew.
Requires professional installation: Proper installation, especially in walls, requires specialized blowing equipment to ensure a dense, even fill. Incorrect installation can lead to a messy cleanup and issues with settling or moisture.
Messy installation: The process of blowing cellulose insulation creates a large amount of dust, requiring thorough cleanup and proper respiratory protection during installation.
Heavy weight: Dense-packed cellulose is significantly heavier than fiberglass. The added weight, especially in attics, can potentially strain or damage ceilings and drywall if not accounted for.
