Cellulose vs Fiberglass: What Actually Stops Heat & Air Movement This is a real-world demonstration showing the difference between fiberglass insulation and Greenfiber cellulose using the same heat source, started at the same time, in identical cavities. What you’re seeing isn’t a gimmick. The setup is equal. The heat source is equal. The timing is equal. The difference comes down to air movement. Fiberglass is made up of linear strands, which naturally create pathways for air to move through th

1.9K views | This Process Shows Dense Pack Cellulose Insulation Installation! #cellulose #insulation | Ciano Enelyn | Facebook