How does the R-value of loose fill cellulose insulation compare to other insulation types?

Loose fill cellulose insulation typically has an R-value of about R-3.5 per inch. This means that for every inch of thickness, it can resist heat flow effectively, providing good thermal insulation. Cellulose insulation is made from recycled paper and treated with fire retardants, making it an environmentally friendly option.

In comparison to other types of insulation, cellulose is less effective than some higher-performing materials such as spray foam insulation, which can have an R-value of around R-6 to R-7 per inch, but it offers superior benefits in terms of air sealing and thermal performance compared to options like fiberglass batts, which often have R-values closer to R-2.9 to R-3.5 per inch, depending on density and installation method.

Therefore, the choice indicating an R-value of about R-3.5 per inch accurately represents the general performance of loose fill cellulose insulation in the field of insulation materials.