What are Pros And Cons Of Blown-In Cellulose Vs. Fiberglass?

Blown-In Cellulose Advantages

Blown-in cellulose insulation offers several advantages over fiberglass. With a higher R-value per inch, cellulose can provide better thermal performance, reducing heat transfer and energy bills. Additionally, cellulose is made from recycled paper products, making it a more eco-friendly option. A single pound of cellulose can insulate up to 4.5 inches of space, whereas fiberglass typically requires 15-20 pounds to achieve the same insulation value. Installing cellulose requires a specialized blower, which can be rented or purchased for around $100-$200.

Fiberglass Installation and Cost

Fiberglass is a more traditional insulation material, widely available and relatively inexpensive. It can be installed using a variety of methods, including blowing, spraying, and batts. Fiberglass batts can be cut to fit between joists and studs, making installation easier for DIY projects. However, fiberglass requires a higher volume of material to achieve the same insulation value as cellulose, which can increase upfront costs. Fiberglass batts typically cost between $0.50-$1.50 per square foot, depending on the quality and R-value.

Comparing Installation Techniques

When it comes to installation, cellulose requires a specialized blower and a team of installers, which can increase labor costs. Fiberglass, on the other hand, can be installed by a homeowner or DIY enthusiast, making the process more accessible. However, cellulose can be blown into tighter spaces and around obstructions, providing better coverage and insulation value. To achieve optimal results, installers should aim to fill the cavity to a depth of 3.5-4 inches for cellulose and 12-14 inches for fiberglass.