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Why Choose Cellulose Over Fiberglass Insulation?

April 6, 2026

Quick Answer

Cellulose insulation is a better choice than fiberglass due to its natural, non-toxic, and eco-friendly properties, as well as its ability to provide excellent thermal performance and fire resistance.

Natural Thermal Performance

Cellulose insulation is made from recycled paper products and is a natural, breathable material that can help regulate indoor temperatures. Its high thermal performance is due to its ability to trap air pockets, which reduces heat transfer and minimizes energy loss. In fact, studies have shown that cellulose insulation can provide up to R-4 per inch, making it a more effective insulator than fiberglass.

Fire Resistance and Safety

Cellulose insulation is also highly resistant to fire and meets or exceeds local building codes. When exposed to flames, cellulose insulation expands, creating a barrier that helps contain the fire and prevents it from spreading. This makes it a safer choice for homes and buildings, especially in areas prone to wildfires. Additionally, cellulose insulation contains no chemicals or additives that can release toxic fumes when heated.

Eco-Friendly and Sustainable

Cellulose insulation is a natural, biodegradable product that can be composted at the end of its life cycle. It is also made from recycled materials, reducing waste and the demand on natural resources. In contrast, fiberglass insulation is typically made from non-renewable resources and can contribute to landfill waste. Choosing cellulose insulation is a sustainable choice that aligns with eco-friendly building practices and reduces a home’s carbon footprint.

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