Cellulose insulation appears fluffy and usually comes in shades of beige, gray, or tan. Its texture and appearance are similar to papier-mâché, paper pulp, or finely shredded paper, giving it a unique and easily recognizable look.
The 3.5 inch thick R-15 insulation offers 36% more R-value compared to the standard R-11 fiberglass insulation. It features a kraft facing that must not be exposed as it can burn. Ensure the facing is in substantial contact with the finishing material and protect it from open flames or other heat sources.
The optimal choice for basement ceiling insulation is closed-cell spray foam. Key to basement insulation is controlling moisture, and closed-cell spray foam excels by providing a robust water vapor barrier.