Blown-in insulation is excellent at trapping heat; however, it won't stop airflow into your attic space from gaps and cracks.

attic ventilation, and sealing. Poor airflow or gaps in the structure can reduce the effectiveness of new insulation, no matter how high its quality. Cellulose insulation typically has a lifespan ...

Cellulose insulation can be installed using the loose-fill method in which the installer or DIYer simply blows the insulation into an open attic using a blowing machine. This method is effective ...

If you can see the floor joists of your attic space through the insulation, it’s likely too thin to provide a sufficient thermal barrier. Dust or Allergens: Older cellulose insulation may ...